[Bug middle-end/45364] Compiling wine's directx.c with -O1 -g takes a very long time
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45364 --- Comment #8 from Richard Biener rguenth at gcc dot gnu.org --- Author: rguenth Date: Tue Jan 28 09:02:59 2014 New Revision: 207172 URL: http://gcc.gnu.org/viewcvs?rev=207172root=gccview=rev Log: 2014-01-28 Richard Biener rguent...@suse.de PR rtl-optimization/45364 PR rtl-optimization/59890 * var-tracking.c (local_get_addr_clear_given_value): Handle already cleared slot. (val_reset): Handle not allocated local_get_addr_cache. (vt_find_locations): Use post-order on the inverted CFG. Modified: trunk/gcc/ChangeLog trunk/gcc/var-tracking.c
[Bug rtl-optimization/59890] var-tracking.c:val_reset segfaults
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59890 --- Comment #3 from Richard Biener rguenth at gcc dot gnu.org --- Author: rguenth Date: Tue Jan 28 09:02:59 2014 New Revision: 207172 URL: http://gcc.gnu.org/viewcvs?rev=207172root=gccview=rev Log: 2014-01-28 Richard Biener rguent...@suse.de PR rtl-optimization/45364 PR rtl-optimization/59890 * var-tracking.c (local_get_addr_clear_given_value): Handle already cleared slot. (val_reset): Handle not allocated local_get_addr_cache. (vt_find_locations): Use post-order on the inverted CFG. Modified: trunk/gcc/ChangeLog trunk/gcc/var-tracking.c
[Bug middle-end/58742] pointer arithmetic simplification
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58742 --- Comment #16 from rguenther at suse dot de rguenther at suse dot de --- On Tue, 21 Jan 2014, glisse at gcc dot gnu.org wrote: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58742 --- Comment #15 from Marc Glisse glisse at gcc dot gnu.org --- Another example: http://stackoverflow.com/q/21253690/1918193 where we have (-DVERSION=2): _128 = img$_M_impl$_M_start_130 + 400; pretmp_146 = (long intD.12) _128; pretmp_145 = (long intD.12) img$_M_impl$_M_start_130; pretmp_76 = pretmp_146 - pretmp_145; pretmp_121 = pretmp_76 /[ex] 4; pretmp_120 = (size_typeD.24047) pretmp_121; We miss that pretmp_120 is a constant, VRP thus fails to eliminate the range checks, vectorization doesn't happen, and the code is more that 4 times slower than it should be. If the desired reassoc version is hard, a simple forwprop pattern matching would already go a long way to alleviate this issue. I agree. I have a patch.
[Bug middle-end/55500] [devirt] trunk fails inline-devirt test #7
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55500 Philip Herron herron.philip at googlemail dot com changed: What|Removed |Added CC||herron.philip at googlemail dot co ||m --- Comment #3 from Philip Herron herron.philip at googlemail dot com --- I just tried this test case with: g++ -O2 -std=c++0x -fdump-tree-optimized test.cc -o test g++ (GCC) 4.9.0 20131127 (experimental) And it ran.
[Bug libstdc++/59656] weak_ptr::lock function crashes when compiling with -fno-exceptions flag
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59656 --- Comment #9 from Jonathan Wakely redi at gcc dot gnu.org --- Author: redi Date: Tue Jan 28 10:23:27 2014 New Revision: 207180 URL: http://gcc.gnu.org/viewcvs?rev=207180root=gccview=rev Log: 2014-01-28 Jonathan Wakely jwak...@redhat.com Kyle Lippincott spect...@google.com PR libstdc++/59656 * include/bits/shared_ptr.h (shared_ptr): Add new non-throwing constructor and grant friendship to weak_ptr. (weak_ptr::lock()): Use new constructor. * include/bits/shared_ptr_base.h (_Sp_counted_base::_M_add_ref_lock_nothrow()): Declare new function and define specializations. (__shared_count): Add new non-throwing constructor. (__shared_ptr): Add new non-throwing constructor and grant friendship to __weak_ptr. (__weak_ptr::lock()): Use new constructor. * testsuite/20_util/shared_ptr/cons/43820_neg.cc: Adjust dg-error. * testsuite/20_util/shared_ptr/cons/void_neg.cc: Likewise. Modified: trunk/libstdc++-v3/ChangeLog trunk/libstdc++-v3/include/bits/shared_ptr.h trunk/libstdc++-v3/include/bits/shared_ptr_base.h trunk/libstdc++-v3/testsuite/20_util/shared_ptr/cons/43820_neg.cc trunk/libstdc++-v3/testsuite/20_util/shared_ptr/cons/void_neg.cc
[Bug libstdc++/59656] weak_ptr::lock function crashes when compiling with -fno-exceptions flag
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59656 Jonathan Wakely redi at gcc dot gnu.org changed: What|Removed |Added Status|ASSIGNED|RESOLVED Resolution|--- |FIXED Target Milestone|--- |4.9.0 --- Comment #10 from Jonathan Wakely redi at gcc dot gnu.org --- Fixed on trunk
[Bug c/59958] alpha does not deal with non-aligned returns from malloc() when doing byte wise access
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59958 --- Comment #2 from Martin Husemann martin at netbsd dot org --- Is the alignment expected from malloc() configurable in gcc and/or different from the standard stack alignment? A small test program along the lines of if ((uintptr_t)malloc(1) mask) printf(yes\n) else printf(no\n); and checking what gcc -O2 optimizes away for different masks seems to show that on alpha 7 is optimized, while 15 is not. This sounds good for alpha. However, I get the same results for amd64 - where I would have expected the required alignement to be 16 byte. Is this a bug in our amd64 target configuration, or am I misundertanding something?
[Bug tree-optimization/59920] [4.9 Regression] build doesn't terminate (at least after an hour)
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59920 Jakub Jelinek jakub at gcc dot gnu.org changed: What|Removed |Added Attachment #31964|0 |1 is obsolete|| Status|NEW |ASSIGNED Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org --- Comment #11 from Jakub Jelinek jakub at gcc dot gnu.org --- Created attachment 31966 -- http://gcc.gnu.org/bugzilla/attachment.cgi?id=31966action=edit gcc49-pr59920.patch Updated patch I'm going to bootstrap/regtest now.
[Bug c++/59916] [4.9 Regression] constructors and destructors can cause control reaches end of non-void function warnings with -Os
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59916
Richard Biener rguenth at gcc dot gnu.org changed:
What|Removed |Added
Target Milestone|--- |4.9.0
--- Comment #2 from Richard Biener rguenth at gcc dot gnu.org ---
Surely frontend related - after gimplification I see
B::B() (struct B * const this, const void * * __vtt_parm)
{
struct B * retval;
retval = B::B (this, 0, __vtt_parm);
}
which misses a return.
[Bug c/59967] New: Performance regression from 4.7.x to 4.8.x (loop not unrolled)
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59967 Bug ID: 59967 Summary: Performance regression from 4.7.x to 4.8.x (loop not unrolled) Product: gcc Version: 4.8.2 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c Assignee: unassigned at gcc dot gnu.org Reporter: chbreitkopf at gmail dot com Created attachment 31967 -- http://gcc.gnu.org/bugzilla/attachment.cgi?id=31967action=edit preprocessed source of ray/src/rt/ambient.c gcc 4.8.x generates 10-15% slower code compared to 4.7.x for Mark Stock's radiance benchmark (http://markjstock.org/pages/rad_bench.html). I observed this regression on Linux x86_64, and with different CPUs (Ivy Bridge, Haswell, AMD Phenom, Kaveri). I had suspected the new register allocator, but the actual cause is a difference in loop unrolling. The hotspot is the nested loops with the recursive call at the end of the sumambient() function. When using -Ofast, gcc 4.7.x will unroll the outer loop, which results in some optimization possibilities in the inner loop. gcc 4.8.x does not unroll the outer loop. -funroll-loops does not change the behavior.
[Bug rtl-optimization/59890] var-tracking.c:val_reset segfaults
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59890 --- Comment #4 from Richard Biener rguenth at gcc dot gnu.org --- Author: rguenth Date: Tue Jan 28 13:13:54 2014 New Revision: 207182 URL: http://gcc.gnu.org/viewcvs?rev=207182root=gccview=rev Log: 2014-01-28 Richard Biener rguent...@suse.de Revert 2014-01-28 Richard Biener rguent...@suse.de PR rtl-optimization/45364 PR rtl-optimization/59890 * var-tracking.c (local_get_addr_clear_given_value): Handle already cleared slot. (val_reset): Handle not allocated local_get_addr_cache. (vt_find_locations): Use post-order on the inverted CFG. Modified: trunk/gcc/ChangeLog trunk/gcc/var-tracking.c
[Bug middle-end/45364] Compiling wine's directx.c with -O1 -g takes a very long time
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45364 --- Comment #9 from Richard Biener rguenth at gcc dot gnu.org --- Author: rguenth Date: Tue Jan 28 13:13:54 2014 New Revision: 207182 URL: http://gcc.gnu.org/viewcvs?rev=207182root=gccview=rev Log: 2014-01-28 Richard Biener rguent...@suse.de Revert 2014-01-28 Richard Biener rguent...@suse.de PR rtl-optimization/45364 PR rtl-optimization/59890 * var-tracking.c (local_get_addr_clear_given_value): Handle already cleared slot. (val_reset): Handle not allocated local_get_addr_cache. (vt_find_locations): Use post-order on the inverted CFG. Modified: trunk/gcc/ChangeLog trunk/gcc/var-tracking.c
[Bug rtl-optimization/59890] var-tracking.c:val_reset segfaults
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59890 --- Comment #5 from Richard Biener rguenth at gcc dot gnu.org --- Seems to break bootstrap now (with -maccumulate-outgoing-args change now for i?86) during libquadmath build where /abuild/rguenther/obj/./gcc/xgcc -B/abuild/rguenther/obj/./gcc/ -B/usr/local/x86_64-unknown-linux-gnu/bin/ -B/usr/local/x86_64-unknown-linux-gnu/lib/ -isystem /usr/local/x86_64-unknown-linux-gnu/include -isystem /usr/local/x86_64-unknown-linux-gnu/sys-include -m32 -DHAVE_CONFIG_H -I. -I/space/rguenther/src/svn/trunk/libquadmath -I /space/rguenther/src/svn/trunk/libquadmath/../include -g -O2 -MT printf/mul_n.lo -MD -MP -MF printf/.deps/mul_n.Tpo -c /space/rguenther/src/svn/trunk/libquadmath/printf/mul_n.c -o printf/mul_n.o doesn't converge anymore in vt_find_locations (). Thus, reverted for now, testcase coming (to be attached here).
[Bug middle-end/59261] [4.9 regression] FAIL: gcc.dg/vect/bb-slp-26.c -flto -ffat-lto-objects (internal compiler error)
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59261 --- Comment #2 from Andreas Schwab sch...@linux-m68k.org --- http://gcc.gnu.org/ml/gcc-testresults/2014-01/msg02171.html It still fails the same. There's a similar ICE in gcc.dg/vect/pr37539.c -flto -ffat-lto-objects: $ gcc/xgcc -Bgcc/ ../gcc/testsuite/gcc.dg/vect/pr37539.c -fno-diagnostics-show-caret -fdiagnostics-color=never -flto -ffat-lto-objects -ftree-vectorize -fno-vect-cost-model -fno-common -O2 -fdump-tree-vect-details -lm -o ./pr37539.exe ../gcc/testsuite/gcc.dg/vect/pr37539.c: In function ‘ayuv2yuyv_ref’: ../gcc/testsuite/gcc.dg/vect/pr37539.c:16:19: internal compiler error: in expand_expr_real_2, at expr.c:9109 0x4056144f expand_expr_real_2(separate_ops*, rtx_def*, machine_mode, expand_modifier) ../../gcc/expr.c:9109 0x4037bdcf expand_gimple_stmt_1 ../../gcc/cfgexpand.c:3249 0x4037bdcf expand_gimple_stmt ../../gcc/cfgexpand.c:3309 0x4037ca3f expand_gimple_basic_block ../../gcc/cfgexpand.c:5149 0x40383f0f gimple_expand_cfg ../../gcc/cfgexpand.c:5715 0x40383f0f execute ../../gcc/cfgexpand.c:5935
[Bug c++/58639] [4.7/4.8/4.9 Regression] ICE on self-referential struct member
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58639 --- Comment #4 from Jason Merrill jason at gcc dot gnu.org --- Author: jason Date: Tue Jan 28 13:40:06 2014 New Revision: 207183 URL: http://gcc.gnu.org/viewcvs?rev=207183root=gccview=rev Log: PR c++/58639 * call.c (build_aggr_conv): Reject value-initialization of reference. Added: branches/gcc-4_7-branch/gcc/testsuite/g++.dg/cpp0x/initlist78.C Modified: branches/gcc-4_7-branch/gcc/cp/ChangeLog branches/gcc-4_7-branch/gcc/cp/call.c
[Bug rtl-optimization/59890] var-tracking.c:val_reset segfaults
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59890
--- Comment #6 from Richard Biener rguenth at gcc dot gnu.org ---
typedef unsigned long int mp_limb_t;
typedef mp_limb_t * mp_ptr;
typedef const mp_limb_t * mp_srcptr;
typedef long int mp_size_t;
mp_limb_t __quadmath_mpn_add_n (mp_ptr, mp_srcptr, mp_srcptr, mp_size_t);
mp_limb_t __quadmath_mpn_addmul_1 (mp_ptr, mp_srcptr, mp_size_t, mp_limb_t);
void __quadmath_mpn_impn_mul_n_basecase (mp_ptr prodp, mp_srcptr up,
mp_srcptr vp, mp_size_t size)
{
mp_size_t i;
mp_limb_t cy_limb;
mp_limb_t v_limb = vp[0];
for (i = 1; i size; i++)
{
if (v_limb = 1)
{
cy_limb = 0;
if (v_limb == 1)
cy_limb = __quadmath_mpn_add_n (prodp, prodp, up, size);
}
else
cy_limb = __quadmath_mpn_addmul_1 (prodp, up, size, v_limb);
prodp[size] = cy_limb;
}
}
fails to converge at -O2 -g -m32 with the patch applied.
[Bug c++/58837] [4.7/4.8/4.9 Regression] [c++11] ICE using invalid condition in static_assert
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58837 --- Comment #3 from Jason Merrill jason at gcc dot gnu.org --- Author: jason Date: Tue Jan 28 13:44:35 2014 New Revision: 207185 URL: http://gcc.gnu.org/viewcvs?rev=207185root=gccview=rev Log: PR c++/58837 * typeck.c (cp_truthvalue_conversion): Use explicit comparison for FUNCTION_DECL. Added: branches/gcc-4_8-branch/gcc/testsuite/g++.dg/cpp0x/static_assert9.C Modified: branches/gcc-4_8-branch/gcc/cp/ChangeLog branches/gcc-4_8-branch/gcc/cp/typeck.c
[Bug c++/59097] [4.7/4.8/4.9 Regression] ICE with invalid statement expression as array size
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59097 --- Comment #2 from Jason Merrill jason at gcc dot gnu.org --- Author: jason Date: Tue Jan 28 13:44:30 2014 New Revision: 207184 URL: http://gcc.gnu.org/viewcvs?rev=207184root=gccview=rev Log: PR c++/59097 * decl.c (compute_array_index_type): Don't call maybe_constant_value for a non-integral expression. Added: branches/gcc-4_8-branch/gcc/testsuite/g++.dg/ext/stmtexpr15.C Modified: branches/gcc-4_8-branch/gcc/cp/ChangeLog branches/gcc-4_8-branch/gcc/cp/decl.c
[Bug c++/58814] [4.7/4.8/4.9 Regression] ICE with volatile and attribute vector_size
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58814 --- Comment #3 from Jason Merrill jason at gcc dot gnu.org --- Author: jason Date: Tue Jan 28 13:44:41 2014 New Revision: 207186 URL: http://gcc.gnu.org/viewcvs?rev=207186root=gccview=rev Log: PR c++/58814 * typeck.c (cp_build_modify_expr): Make the RHS an rvalue before stabilizing. Added: branches/gcc-4_8-branch/gcc/testsuite/g++.dg/ext/vector25.C Modified: branches/gcc-4_8-branch/gcc/cp/ChangeLog branches/gcc-4_8-branch/gcc/cp/typeck.c
[Bug c++/58606] [4.8/4.9 Regression] [c++11] ICE with specialization in variadic template
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58606 --- Comment #3 from Jason Merrill jason at gcc dot gnu.org --- Author: jason Date: Tue Jan 28 13:44:57 2014 New Revision: 207189 URL: http://gcc.gnu.org/viewcvs?rev=207189root=gccview=rev Log: PR c++/58606 * pt.c (template_parm_to_arg): Call convert_from_reference. (tsubst_template_arg): Don't strip reference refs. Added: branches/gcc-4_8-branch/gcc/testsuite/g++.dg/cpp0x/variadic146.C Modified: branches/gcc-4_8-branch/gcc/cp/ChangeLog branches/gcc-4_8-branch/gcc/cp/pt.c
[Bug c++/58639] [4.7/4.8/4.9 Regression] ICE on self-referential struct member
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58639 --- Comment #5 from Jason Merrill jason at gcc dot gnu.org --- Author: jason Date: Tue Jan 28 13:44:51 2014 New Revision: 207188 URL: http://gcc.gnu.org/viewcvs?rev=207188root=gccview=rev Log: PR c++/58639 * call.c (build_aggr_conv): Reject value-initialization of reference. Added: branches/gcc-4_8-branch/gcc/testsuite/g++.dg/cpp0x/initlist78.C Modified: branches/gcc-4_8-branch/gcc/cp/ChangeLog branches/gcc-4_8-branch/gcc/cp/call.c
[Bug c++/58504] [4.7/4.8/4.9 regression] ICE with type trait as default template parameter
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58504 --- Comment #3 from Jason Merrill jason at gcc dot gnu.org --- Author: jason Date: Tue Jan 28 13:45:02 2014 New Revision: 207190 URL: http://gcc.gnu.org/viewcvs?rev=207190root=gccview=rev Log: PR c++/58504 * pt.c (tsubst_copy_and_build) [TRAIT_EXPR]: Use tsubst for types. Added: branches/gcc-4_8-branch/gcc/testsuite/g++.dg/ext/traits1.C Modified: branches/gcc-4_8-branch/gcc/cp/ChangeLog branches/gcc-4_8-branch/gcc/cp/pt.c
[Bug c++/54652] [4.7/4.8/4.9 Regression] ICE with -g
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54652 --- Comment #4 from Jason Merrill jason at gcc dot gnu.org --- Author: jason Date: Tue Jan 28 13:45:08 2014 New Revision: 207191 URL: http://gcc.gnu.org/viewcvs?rev=207191root=gccview=rev Log: PR c++/54652 * decl.c (duplicate_decls): Always use oldtype for TYPE_DECL. Added: branches/gcc-4_8-branch/gcc/testsuite/g++.dg/ext/attrib48.C Modified: branches/gcc-4_8-branch/gcc/cp/ChangeLog branches/gcc-4_8-branch/gcc/cp/decl.c
[Bug c++/58812] [4.7/4.8/4.9 Regression] ICE initializing an r-value reference with an initializer list
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58812 --- Comment #2 from Jason Merrill jason at gcc dot gnu.org --- Author: jason Date: Tue Jan 28 13:44:46 2014 New Revision: 207187 URL: http://gcc.gnu.org/viewcvs?rev=207187root=gccview=rev Log: PR c++/58812 * call.c (convert_like_real): Give helpful error about excess braces for reference binding, too. Added: branches/gcc-4_8-branch/gcc/testsuite/g++.dg/cpp0x/initlist76.C Modified: branches/gcc-4_8-branch/gcc/cp/ChangeLog branches/gcc-4_8-branch/gcc/cp/call.c
[Bug c++/54652] [4.7/4.8/4.9 Regression] ICE with -g
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54652 --- Comment #6 from Jason Merrill jason at gcc dot gnu.org --- Author: jason Date: Tue Jan 28 13:51:15 2014 New Revision: 207192 URL: http://gcc.gnu.org/viewcvs?rev=207192root=gccview=rev Log: PR c++/54652 * decl.c (duplicate_decls): Always use oldtype for TYPE_DECL. Added: branches/gcc-4_7-branch/gcc/testsuite/g++.dg/ext/attrib48.C Modified: branches/gcc-4_7-branch/gcc/cp/ChangeLog branches/gcc-4_7-branch/gcc/cp/decl.c
[Bug c++/59097] [4.7/4.8/4.9 Regression] ICE with invalid statement expression as array size
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59097 Jason Merrill jason at gcc dot gnu.org changed: What|Removed |Added Status|ASSIGNED|RESOLVED Resolution|--- |FIXED Target Milestone|4.7.4 |4.8.3 --- Comment #3 from Jason Merrill jason at gcc dot gnu.org --- Fixed for 4.8.3/4.9. Not applying to 4.7.
[Bug c++/54652] [4.7/4.8/4.9 Regression] ICE with -g
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54652 Jason Merrill jason at gcc dot gnu.org changed: What|Removed |Added Status|ASSIGNED|RESOLVED Resolution|--- |FIXED --- Comment #5 from Jason Merrill jason at gcc dot gnu.org --- Fixed.
[Bug c++/58837] [4.7/4.8/4.9 Regression] [c++11] ICE using invalid condition in static_assert
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58837 Jason Merrill jason at gcc dot gnu.org changed: What|Removed |Added Status|ASSIGNED|RESOLVED Resolution|--- |FIXED Target Milestone|4.7.4 |4.8.3 --- Comment #4 from Jason Merrill jason at gcc dot gnu.org --- Fixed for 4.8.3/4.9. Not fixing in 4.7.
[Bug c++/58814] [4.7/4.8/4.9 Regression] ICE with volatile and attribute vector_size
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58814 Jason Merrill jason at gcc dot gnu.org changed: What|Removed |Added Status|ASSIGNED|RESOLVED Resolution|--- |FIXED Target Milestone|4.7.4 |4.8.3 --- Comment #4 from Jason Merrill jason at gcc dot gnu.org --- Fixed for 4.8.3/4.9. Not fixing in 4.7.
[Bug c++/58812] [4.7/4.8/4.9 Regression] ICE initializing an r-value reference with an initializer list
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58812 Jason Merrill jason at gcc dot gnu.org changed: What|Removed |Added Status|ASSIGNED|RESOLVED Resolution|--- |FIXED Target Milestone|4.7.4 |4.8.3 --- Comment #3 from Jason Merrill jason at gcc dot gnu.org --- Fixed for 4.8.3/4.9. Not fixing in 4.7.
[Bug c++/58651] [4.7/4.8/4.9 Regression] ICE with invalid initializer list
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58651 Jason Merrill jason at gcc dot gnu.org changed: What|Removed |Added Status|ASSIGNED|RESOLVED Resolution|--- |FIXED Target Milestone|4.7.4 |4.8.3 --- Comment #3 from Jason Merrill jason at gcc dot gnu.org --- Fixed for 4.8.3/4.9. Not applying to 4.7.
[Bug c++/58639] [4.7/4.8/4.9 Regression] ICE on self-referential struct member
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58639 Jason Merrill jason at gcc dot gnu.org changed: What|Removed |Added Status|ASSIGNED|RESOLVED Resolution|--- |FIXED --- Comment #6 from Jason Merrill jason at gcc dot gnu.org --- Fixed for 4.7.4/4.8.3/4.9.
[Bug c++/58504] [4.7/4.8/4.9 regression] ICE with type trait as default template parameter
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58504 Jason Merrill jason at gcc dot gnu.org changed: What|Removed |Added Status|ASSIGNED|RESOLVED Resolution|--- |FIXED Target Milestone|4.7.4 |4.8.3 --- Comment #4 from Jason Merrill jason at gcc dot gnu.org --- Fixed for 4.8.3/4.9. Not applying to 4.7 unless someone cares.
[Bug c++/58606] [4.8/4.9 Regression] [c++11] ICE with specialization in variadic template
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58606 Jason Merrill jason at gcc dot gnu.org changed: What|Removed |Added Status|ASSIGNED|RESOLVED Resolution|--- |FIXED --- Comment #4 from Jason Merrill jason at gcc dot gnu.org --- Fixed for 4.8.3/4.9.
[Bug c++/59823] [4.7/4.8/4.9 Regression] conversion operator to const X causes copy-construction of temporary
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59823 Jason Merrill jason at gcc dot gnu.org changed: What|Removed |Added Target Milestone|--- |4.9.0 --- Comment #3 from Jason Merrill jason at gcc dot gnu.org --- Fixed in 4.9. Will apply to 4.8 later if no problems arise.
[Bug middle-end/59261] [4.9 regression] FAIL: gcc.dg/vect/bb-slp-26.c -flto -ffat-lto-objects (internal compiler error)
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59261 --- Comment #3 from Jeffrey A. Law law at redhat dot com --- Can you include -v on your command line. It'd also be helpful if you could include the intermediates generated by -save-temps.
[Bug target/59968] New: Unused BT patterns
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59968 Bug ID: 59968 Summary: Unused BT patterns Product: gcc Version: 4.9.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: target Assignee: unassigned at gcc dot gnu.org Reporter: hjl.tools at gmail dot com Target: x86/x86-64 There are some BT patterns in i386 guarded with TARGET_USE_BT. But there are no testcases to show if they are used at all. Also BT instructions supports memory destination. But BT patterns only allow register destination.
[Bug libstdc++/59969] New: std::pair nonstandard constructor interferes when calling map::emplace with noncopyable nonmovable object
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59969
Bug ID: 59969
Summary: std::pair nonstandard constructor interferes when
calling map::emplace with noncopyable nonmovable
object
Product: gcc
Version: 4.8.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: gcc.gnu.org.49489...@oli-obk.de
Created attachment 31968
-- http://gcc.gnu.org/bugzilla/attachment.cgi?id=31968action=edit
example that cannot be built due to the bug
see also:
http://stackoverflow.com/questions/21405674/why-do-i-need-to-use-piecewise-construct-in-mapemplace-for-single-arg-construc
the issue is that on construction of the pair, the nonstandard constructor
// DR 811.
templateclass _U1,
class = typename enable_ifis_convertible_U1, _T1::value::type
constexpr pair(_U1 __x, const _T2 __y)
: first(std::forward_U1(__x)), second(__y) { }
is preferred over the standard constructor
templateclass _U1, class _U2,
class = typename enable_if__and_is_convertible_U1, _T1,
is_convertible_U2, _T2
::value
::type
constexpr pair(_U1 __x, _U2 __y)
: first(std::forward_U1(__x)), second(std::forward_U2(__y)) { }
[Bug middle-end/58742] pointer arithmetic simplification
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58742 --- Comment #17 from Richard Biener rguenth at gcc dot gnu.org --- Author: rguenth Date: Tue Jan 28 14:53:52 2014 New Revision: 207194 URL: http://gcc.gnu.org/viewcvs?rev=207194root=gccview=rev Log: 2014-01-28 Richard Biener rguent...@suse.de PR tree-optimization/58742 * tree-ssa-forwprop.c (associate_plusminus): Handle pointer subtraction of the form (T)(P + A) - (T)P. Modified: trunk/gcc/ChangeLog trunk/gcc/tree-ssa-forwprop.c
[Bug middle-end/58742] pointer arithmetic simplification
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58742 Richard Biener rguenth at gcc dot gnu.org changed: What|Removed |Added Status|NEW |ASSIGNED --- Comment #18 from Richard Biener rguenth at gcc dot gnu.org --- I'll tackle the EXACT_DIV_EXPR / MULT_EXPR cancellation next. Seems easy enough.
[Bug preprocessor/59935] [4.9 Regression] Firefox build fails with: built-in: internal compiler error: Segmentation fault
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59935 --- Comment #9 from Dodji Seketeli dodji at gcc dot gnu.org --- Author: dodji Date: Tue Jan 28 15:03:19 2014 New Revision: 207195 URL: http://gcc.gnu.org/viewcvs?rev=207195root=gccview=rev Log: PR preprocessor/59935 - caret diagnostics crashes on non-file locations gcc/ChangeLog * input.c (location_get_source_line): Bail out on when line number is zero, and test the return value of lookup_or_add_file_to_cache_tab. gcc/testsuite/ChangeLog * c-c++-common/cpp/warning-zero-location.c: New test. * c-c++-common/cpp/warning-zero-location-2.c: Likewise. Signed-off-by: Dodji Seketeli do...@seketeli.org Added: trunk/gcc/testsuite/c-c++-common/cpp/warning-zero-location-2.c trunk/gcc/testsuite/c-c++-common/cpp/warning-zero-location.c Modified: trunk/gcc/ChangeLog trunk/gcc/input.c trunk/gcc/testsuite/ChangeLog
[Bug sanitizer/59966] All plugin tests fails with --with-build-config=bootstrap-asan
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59966 H.J. Lu hjl.tools at gmail dot com changed: What|Removed |Added Status|UNCONFIRMED |RESOLVED Resolution|--- |DUPLICATE --- Comment #1 from H.J. Lu hjl.tools at gmail dot com --- Dup *** This bug has been marked as a duplicate of bug 55440 ***
[Bug testsuite/55440] Plugin tests is compiled with wrong CFLAGS
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55440 --- Comment #2 from H.J. Lu hjl.tools at gmail dot com --- *** Bug 59966 has been marked as a duplicate of this bug. ***
[Bug testsuite/55440] Plugin tests is compiled with wrong CFLAGS
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55440 H.J. Lu hjl.tools at gmail dot com changed: What|Removed |Added Status|UNCONFIRMED |NEW Last reconfirmed||2014-01-28 Target Milestone|--- |4.9.0 Ever confirmed|0 |1
[Bug preprocessor/59935] [4.9 Regression] Firefox build fails with: built-in: internal compiler error: Segmentation fault
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59935 Markus Trippelsdorf trippels at gcc dot gnu.org changed: What|Removed |Added Status|ASSIGNED|RESOLVED Resolution|--- |FIXED --- Comment #10 from Markus Trippelsdorf trippels at gcc dot gnu.org --- Fixed. Thank you.
[Bug target/58622] With -fomit-frame-pointer, A64 does not generate post-decrement stores
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58622 Richard Earnshaw rearnsha at gcc dot gnu.org changed: What|Removed |Added Status|UNCONFIRMED |NEW Last reconfirmed||2014-01-28 Ever confirmed|0 |1 --- Comment #1 from Richard Earnshaw rearnsha at gcc dot gnu.org --- Confirmed. Prologue and epilogue code is constructed in the backend late on. Any optimizations have to be done during the code generation. The particular path with -fomit-frame-pointer is not on by default and clearly hasn't been tuned yet.
[Bug c++/58466] [4.8/4.9 Regression] ICE in cxx_eval_constant_expression
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58466 Markus Trippelsdorf trippels at gcc dot gnu.org changed: What|Removed |Added CC||chretien at lirmm dot fr --- Comment #10 from Markus Trippelsdorf trippels at gcc dot gnu.org --- *** Bug 59956 has been marked as a duplicate of this bug. ***
[Bug c++/59956] internal compiler error: unexpected expression ‘P_S’ of kind template_parm_index
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59956 Markus Trippelsdorf trippels at gcc dot gnu.org changed: What|Removed |Added Status|NEW |RESOLVED Resolution|--- |DUPLICATE --- Comment #3 from Markus Trippelsdorf trippels at gcc dot gnu.org --- dup. *** This bug has been marked as a duplicate of bug 58466 ***
[Bug middle-end/58742] pointer arithmetic simplification
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58742
--- Comment #19 from Richard Biener rguenth at gcc dot gnu.org ---
The original identity will remain. That is,
;; Function fx (fx, funcdef_no=0, decl_uid=1743, symbol_order=0)
fx (int * b, int * e)
{
long int e.0_2;
long int b.1_4;
long int _5;
long unsigned int _6;
int * _7;
bb 2:
e.0_2 = (long int) e_1(D);
b.1_4 = (long int) b_3(D);
_5 = e.0_2 - b.1_4;
_6 = (long unsigned int) _5;
_7 = b_3(D) + _6;
return _7;
}
that is to be pattern-matched separately, in associate_pointerplus. Of course
that's only a piece of associating as b+5+(e-b) will then still not be
optimized.
[Bug target/59968] Unused BT patterns
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59968
H.J. Lu hjl.tools at gmail dot com changed:
What|Removed |Added
CC||areg.melikadamyan at gmail dot
com
||, kirill.yukhin at intel dot
com
--- Comment #2 from H.J. Lu hjl.tools at gmail dot com ---
For
int bar1;
void
__attribute__((noinline))
foo1 (int y)
{
bar1 |= 1 y;
}
we generate:
movl$1, %eax
movl%edi, %ecx
sall%cl, %eax
orl%eax, bar1(%rip)
ret
I am expecting:
bts %edi, bar1(%rip)
ret
[Bug target/59968] Unused BT patterns
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59968
H.J. Lu hjl.tools at gmail dot com changed:
What|Removed |Added
Status|UNCONFIRMED |NEW
Last reconfirmed||2014-01-28
Ever confirmed|0 |1
--- Comment #1 from H.J. Lu hjl.tools at gmail dot com ---
For
int
__attribute__((noinline))
foo1 (int x, int y)
{
x |= 1 y;
return x;
}
we generate
movl%esi, %ecx
movl$1, %eax
sall%cl, %eax
orl%edi, %eax
ret
I am expecting
movl%edi, %eax
bts %esi, %eax
ret
[Bug target/59968] Unused BT patterns
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59968 --- Comment #4 from Uroš Bizjak ubizjak at gmail dot com --- The conversion to bt is somewhat fragile ATM, implemented with various splitters. There was discussion to represent bit-test instructions with its own RTX, with the intention to generate them from middle-end in a more consistent way.
[Bug middle-end/59261] [4.9 regression] FAIL: gcc.dg/vect/bb-slp-26.c -flto -ffat-lto-objects (internal compiler error)
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59261 --- Comment #5 from Andreas Schwab sch...@linux-m68k.org --- Created attachment 31969 -- http://gcc.gnu.org/bugzilla/attachment.cgi?id=31969action=edit Intermediate files from -save-temps
[Bug target/59672] Add -m16 support for x86
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59672 --- Comment #8 from hjl at gcc dot gnu.org hjl at gcc dot gnu.org --- Author: hjl Date: Tue Jan 28 16:22:45 2014 New Revision: 207196 URL: http://gcc.gnu.org/viewcvs?rev=207196root=gccview=rev Log: Add -m16 support for x86 The .code16gcc directive was added to binutils back in 1999: --- '.code16gcc' provides experimental support for generating 16-bit code from gcc, and differs from '.code16' in that 'call', 'ret', 'enter', 'leave', 'push', 'pop', 'pusha', 'popa', 'pushf', and 'popf' instructions default to 32-bit size. This is so that the stack pointer is manipulated in the same way over function calls, allowing access to function parameters at the same stack offsets as in 32-bit mode. '.code16gcc' also automatically adds address size prefixes where necessary to use the 32-bit addressing modes that gcc generates. --- It encodes 32-bit assembly instructions generated by GCC in 16-bit format so that GCC can be used to generate 16-bit instructions. To do that, the .code16gcc directive must be placed at the very beginning of the assembly code. This patch adds -m16 to x86 backend by: 1. Add -m16 and make it mutually exclusive with -m32, -m64 and -mx32. 2. Treat -m16 like -m32 so that --32 is passed to assembler. 3. Output .code16gcc at the very beginning of the assembly code. 4. Turn off 64-bit ISA when -m16 is used. PR target/59672 * config/i386/gnu-user64.h (SPEC_32): Add m16| to m32. (SPEC_X32): Likewise. (SPEC_64): Likewise. * config/i386/i386.c (ix86_option_override_internal): Turn off OPTION_MASK_ISA_64BIT, OPTION_MASK_ABI_X32 and OPTION_MASK_ABI_64 for TARGET_16BIT. (x86_file_start): Output .code16gcc for TARGET_16BIT. * config/i386/i386.h (TARGET_16BIT): New macro. (TARGET_16BIT_P): Likewise. * config/i386/i386.opt: Add m16. * doc/invoke.texi: Document -m16. Modified: trunk/gcc/ChangeLog trunk/gcc/config/i386/gnu-user64.h trunk/gcc/config/i386/i386.c trunk/gcc/config/i386/i386.h trunk/gcc/config/i386/i386.opt trunk/gcc/doc/invoke.texi
[Bug middle-end/59261] [4.9 regression] FAIL: gcc.dg/vect/bb-slp-26.c -flto -ffat-lto-objects (internal compiler error)
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59261 --- Comment #4 from Andreas Schwab sch...@linux-m68k.org --- $ gcc/xgcc -B gcc/ ../gcc/testsuite/gcc.dg/vect/bb-slp-26.c -flto -ffat-lto-objects -ftree-vectorize -fno-vect-cost-model -fno-common -O2 -v Reading specs from gcc/specs COLLECT_GCC=gcc/xgcc COLLECT_LTO_WRAPPER=gcc/lto-wrapper Target: ia64-suse-linux Configured with: ../configure --prefix=/usr --build=ia64-suse-linux --host=ia64-suse-linux --enable-checking=release --enable-shared --with-system-zlib CFLAGS='-O2 -g' CXXFLAGS='-O2 -g' Thread model: posix gcc version 4.9.0 20140128 (experimental) [trunk revision 207160] (GCC) COLLECT_GCC_OPTIONS='-B' 'gcc/' '-flto' '-ffat-lto-objects' '-ftree-vectorize' '-fvect-cost-model=unlimited' '-fno-common' '-O2' '-v' gcc/cc1 -quiet -v -iprefix /usr/local/gcc/gcc-20140128/Build/gcc/../lib/gcc/ia64-suse-linux/4.9.0/ -isystem gcc/include -isystem gcc/include-fixed ../gcc/testsuite/gcc.dg/vect/bb-slp-26.c -quiet -dumpbase bb-slp-26.c -auxbase bb-slp-26 -O2 -version -flto -ffat-lto-objects -ftree-vectorize -fvect-cost-model=unlimited -fno-common -o /tmp/ccnI2B5p.s GNU C (GCC) version 4.9.0 20140128 (experimental) [trunk revision 207160] (ia64-suse-linux) compiled by GNU C version 4.9.0 20140128 (experimental) [trunk revision 207160], GMP version 4.3.2, MPFR version 2.4.2, MPC version 1.0 GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 ignoring nonexistent directory /usr/local/gcc/gcc-20140128/Build/gcc/../lib/gcc/ia64-suse-linux/4.9.0/include ignoring nonexistent directory /usr/local/gcc/gcc-20140128/Build/gcc/../lib/gcc/ia64-suse-linux/4.9.0/include-fixed ignoring nonexistent directory /usr/local/gcc/gcc-20140128/Build/gcc/../lib/gcc/ia64-suse-linux/4.9.0/../../../../ia64-suse-linux/include ignoring nonexistent directory /usr/local/gcc/gcc-20140128/Build/gcc/../lib/gcc/../../lib/gcc/ia64-suse-linux/4.9.0/include ignoring nonexistent directory /usr/local/gcc/gcc-20140128/Build/gcc/../lib/gcc/../../lib/gcc/ia64-suse-linux/4.9.0/include-fixed ignoring nonexistent directory /usr/local/gcc/gcc-20140128/Build/gcc/../lib/gcc/../../lib/gcc/ia64-suse-linux/4.9.0/../../../../ia64-suse-linux/include #include ... search starts here: #include ... search starts here: gcc/include gcc/include-fixed /usr/local/include /usr/include End of search list. GNU C (GCC) version 4.9.0 20140128 (experimental) [trunk revision 207160] (ia64-suse-linux) compiled by GNU C version 4.9.0 20140128 (experimental) [trunk revision 207160], GMP version 4.3.2, MPFR version 2.4.2, MPC version 1.0 GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 Compiler executable checksum: 9ec120f50573ca1e0b5055cf7d3946d0 COLLECT_GCC_OPTIONS='-B' 'gcc/' '-flto' '-ffat-lto-objects' '-ftree-vectorize' '-fvect-cost-model=unlimited' '-fno-common' '-O2' '-v' gcc/as -v -x -o /tmp/ccIBjE6p.o /tmp/ccnI2B5p.s GNU assembler version 2.23.1 (ia64-suse-linux) using BFD version (GNU Binutils; SUSE Linux Enterprise 11) 2.23.1 COMPILER_PATH=gcc/ LIBRARY_PATH=gcc/:/lib/:/usr/lib/ COLLECT_GCC_OPTIONS='-B' 'gcc/' '-flto' '-ffat-lto-objects' '-ftree-vectorize' '-fvect-cost-model=unlimited' '-fno-common' '-O2' '-v' gcc/collect2 -plugin gcc/liblto_plugin.so -plugin-opt=gcc/lto-wrapper -plugin-opt=-fresolution=/tmp/ccAVXv8p.res -plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lgcc_s -plugin-opt=-pass-through=-lunwind -plugin-opt=-pass-through=-lc -plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lgcc_s -plugin-opt=-pass-through=-lunwind -flto -dynamic-linker /lib/ld-linux-ia64.so.2 /usr/lib/crt1.o /usr/lib/crti.o gcc/crtbegin.o -Lgcc /tmp/ccIBjE6p.o -lgcc --as-needed -lgcc_s -lunwind --no-as-needed -lc -lgcc --as-needed -lgcc_s -lunwind --no-as-needed gcc/crtend.o /usr/lib/crtn.o gcc/xgcc @/tmp/cc8GnggF.args Reading specs from gcc/specs COLLECT_GCC=gcc/xgcc Target: ia64-suse-linux Configured with: ../configure --prefix=/usr --build=ia64-suse-linux --host=ia64-suse-linux --enable-checking=release --enable-shared --with-system-zlib CFLAGS='-O2 -g' CXXFLAGS='-O2 -g' Thread model: posix gcc version 4.9.0 20140128 (experimental) [trunk revision 207160] (GCC) COLLECT_GCC_OPTIONS='-c' '-B' 'gcc/' '-ffat-lto-objects' '-ftree-vectorize' '-fvect-cost-model=unlimited' '-fno-common' '-O2' '-v' '-fltrans-output-list=/tmp/cceMmjdF.ltrans.out' '-fwpa' '-fresolution=/tmp/ccAVXv8p.res' gcc/lto1 -quiet -dumpbase ccIBjE6p.o -auxbase ccIBjE6p -O2 -version -ffat-lto-objects -ftree-vectorize -fvect-cost-model=unlimited -fno-common -fltrans-output-list=/tmp/cceMmjdF.ltrans.out -fwpa -fresolution=/tmp/ccAVXv8p.res @/tmp/ccDZYbNE GNU GIMPLE (GCC) version 4.9.0 20140128 (experimental) [trunk revision 207160] (ia64-suse-linux) compiled by GNU C version 4.9.0 20140128 (experimental) [trunk revision 207160], GMP version 4.3.2, MPFR version 2.4.2, MPC version 1.0 GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 GNU GIMPLE (GCC) version
[Bug tree-optimization/59679] gcc version 4.7.3 and gcc version 4.5.3 cause an unaligned access exception on NetBSD/Alpha
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59679 Uroš Bizjak ubizjak at gmail dot com changed: What|Removed |Added Status|WAITING |NEW Component|target |tree-optimization Target Milestone|--- |4.7.4 --- Comment #13 from Uroš Bizjak ubizjak at gmail dot com --- Confirmed as tree-optimization problem on 4.9 branch. The compiler was build as a crosscompiler from x86_64-linux-gnu to alpha-linux-gnu, configured with configure --target=alpha-linux-gnu. The preprocessed source from comment 12 is compiled with: a) gcc-build-alpha/gcc/cc1 -O2 -fno-tree-ter -fpreprocessed scope-reduced-preprocessed.c b) gcc-build-alpha/gcc/cc1 -O2 -fpreprocessed scope-reduced-preprocessed.c where a) creates correct binary (scope-reduced.s) and b) creates wrong binary (scope-reduced_.s). The difference between scope-reduced.s (correct) and scope-reduced_.s (wrong): --- scope-reduced.s 2014-01-28 17:45:07.803092987 +0100 +++ scope-reduced_.s2014-01-28 17:44:50.365312704 +0100 @@ -16,7 +16,7 @@ $Perl_leave_scope..ng: lda $30,-16($30) cpys $f31,$f31,$f31 - mov $31,$5 + mov $31,$6 ldl $1,48($16) mov $31,$8 stq $26,0($30) @@ -33,10 +33,10 @@ s8addq $2,$1,$1 ldq $3,0($1) and $3,63,$18 - cmpule $18,4,$6 - bne $6,$L3 + cmpule $18,4,$5 + bne $5,$L3 cmpule $18,20,$2 - ldq $5,-8($1) + ldq $6,-8($1) beq $2,$L4 lda $2,-8($1) $L5: @@ -65,14 +65,12 @@ br $31,$L5 .align 4 $L17: - sll $3,48,$3 - ldq_u $1,0($5) - sra $3,56,$3 - mskbl $1,$5,$1 - insbl $3,$5,$3 + extbl $3,1,$3 + ldl $1,0($6) + bic $1,255,$1 cpys $f31,$f31,$f31 bis $3,$1,$3 - stq_u $3,0($5) + stl $3,0($6) ldl $1,48($16) cmplt $17,$1,$2 bne $2,$L12 @@ -84,24 +82,24 @@ $L9: ldl $2,12($8) ldl $1,48($16) - bis $5,$2,$2 + bis $6,$2,$2 stl $2,12($8) br $31,$L2 .align 4 $L8: ldq $3,0($16) ldq $22,24($16) - ldq $4,0($5) + ldq $4,0($6) bis $31,$31,$31 mov $2,$1 - ldq $6,0($7) + ldq $5,0($7) subq $3,$22,$2 cpys $f31,$f31,$f31 sra $2,3,$2 stq $2,16($4) ldq $4,16($7) - ldq $3,24($6) - ldq $2,16($6) + ldq $3,24($5) + ldq $2,16($5) stq $4,24($16) s8addq $3,$4,$3 stq $7,184($16) The problem can be seen just after $L17 label.
[Bug target/59968] Unused BT patterns
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59968 --- Comment #3 from Uroš Bizjak ubizjak at gmail dot com --- (In reply to H.J. Lu from comment #0) There are some BT patterns in i386 guarded with TARGET_USE_BT. But there are no testcases to show if they are used at all. testsuite/gcc.target/i386/bt-*.c Also BT instructions supports memory destination. But BT patterns only allow register destination. bt with a memory operand is slow. The bitpos argument is not limited to operand size, and is primarily used for locked memory access. BTW: $ objdump -d cc1 | grep bt | wc -l 1228
[Bug tree-optimization/59932] spurious undefined behavior warning on valid code
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59932
Jakub Jelinek jakub at gcc dot gnu.org changed:
What|Removed |Added
CC||jakub at gcc dot gnu.org
--- Comment #5 from Jakub Jelinek jakub at gcc dot gnu.org ---
(In reply to Zhendong Su from comment #2)
(In reply to Andrew Pinski from comment #1)
I don't see why you think this is not undefined behavior.
If p1 starts at 1, it cannot turn into 0 as p1++ overflows during the
2147483646th iteration.
Andrew, because d.f1 l is false, so the code simply returns (return
b;).
I also always double-check with CompCert's reference interpreter and Frama-C
if possible.
There clearly is a loop with undefined behavior if it is every entered (several
of them), but you just never happen to enter it. Whether to warn about bugs in
obviously dead code is a heated debate, some people ask for it, others don't
want it, but in this case whether the compiler knows it is dead code or not
depends on optimizations. GCC doesn't warn about the other loops because they
have multiple exits and the -Waggressive-loop-optimization warning is, in order
to have as few false positives as possible, only used for the most simple
loops.
Anyway, in this case IMHO it is very well worth the false positive in this
case, rather than never warning because we can't be 100% sure if it isn't in
dead code.
After all, we couldn't then warn about
int a[3];
void foo (void)
{
for (int i = 0; i 4; i++)
a[i]++;
}
just because main might not call foo at all and thus you'd never invoke the
undefined behavior.
[Bug target/59968] Unused BT patterns
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59968
--- Comment #5 from H.J. Lu hjl.tools at gmail dot com ---
For
int
__attribute__((noinline))
foo1 (int x, int y)
{
x = (1 y);
return x != 0;
}
we generate
movl%esi, %ecx
movl$1, %eax
sall%cl, %eax
testl%edi, %eax
setne%al
movzbl%al, %eax
ret
I am expecting:
bt %esi, %edi
setc%al
movzbl%al, %eax
ret
[Bug c++/53756] [C++1y] ICE: in gen_type_die_with_usage, at dwarf2out.c:18774 with -g and operator auto ()
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53756 --- Comment #6 from Jason Merrill jason at gcc dot gnu.org --- Author: jason Date: Tue Jan 28 17:06:40 2014 New Revision: 207197 URL: http://gcc.gnu.org/viewcvs?rev=207197root=gccview=rev Log: PR c++/53756 gcc/ * dwarf2out.c (auto_die): New static. (gen_type_die_with_usage): Handle C++1y 'auto'. (gen_subprogram_die): If in-class DIE had 'auto', emit type again on definition. gcc/cp/ * mangle.c (write_unqualified_name): Handle operator auto. Added: trunk/gcc/testsuite/g++.dg/cpp1y/auto-fn22.C trunk/gcc/testsuite/g++.dg/debug/dwarf2/auto1.C Modified: trunk/gcc/ChangeLog trunk/gcc/cp/ChangeLog trunk/gcc/cp/mangle.c trunk/gcc/dwarf2out.c trunk/gcc/testsuite/g++.dg/cpp1y/auto-fn12.C
[Bug c++/53756] [C++1y] ICE: in gen_type_die_with_usage, at dwarf2out.c:18774 with -g and operator auto ()
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53756 Jason Merrill jason at gcc dot gnu.org changed: What|Removed |Added Target Milestone|--- |4.9.0 --- Comment #7 from Jason Merrill jason at gcc dot gnu.org --- Fixed in 4.9 so far.
[Bug tree-optimization/59679] gcc version 4.7.3 and gcc version 4.5.3 cause an unaligned access exception on NetBSD/Alpha
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59679 --- Comment #14 from Uroš Bizjak ubizjak at gmail dot com --- There is no differences in .optimized tree dumps.
[Bug fortran/59941] [4.7 Regression] [OOP] ICE with polymorphic types
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59941 --- Comment #10 from janus at gcc dot gnu.org --- (In reply to janus from comment #8) Backtrace from gdb: Program received signal SIGSEGV, Segmentation fault. 0x004d19d6 in replace_comp (expr=expr@entry=0x146cc10, sym=sym@entry=0x146f7a0, i=i@entry=0x7fffdc6c) at /home/jweil/gcc47/branch/gcc/fortran/expr.c:4199 4199 !gfc_is_intrinsic (expr-symtree-n.sym, 0, expr-where))) (gdb) bt #0 0x004d19d6 in replace_comp (expr=expr@entry=0x146cc10, sym=sym@entry=0x146f7a0, i=i@entry=0x7fffdc6c) at /home/jweil/gcc47/branch/gcc/fortran/expr.c:4199 Here in replace_comp, the sym is 'get_smatrix', and the problem is that expr-symtree is NULL. #1 0x004d46ba in gfc_traverse_expr (expr=0x146cc10, sym=sym@entry=0x146f7a0, func=func@entry=0x4d19a0 replace_comp, f=f@entry=0) at /home/jweil/gcc47/branch/gcc/fortran/expr.c:3929 #2 0x004d6c9c in gfc_expr_replace_comp (expr=optimized out, dest=dest@entry=0x146f7a0) at /home/jweil/gcc47/branch/gcc/fortran/expr.c:4218 #3 0x00524615 in resolve_fl_derived0 (sym=sym@entry=0x146e590) at /home/jweil/gcc47/branch/gcc/fortran/resolve.c:11724 #4 0x0052c80d in resolve_fl_derived (sym=sym@entry=0x146e590) at /home/jweil/gcc47/branch/gcc/fortran/resolve.c:12046 In here the sym is '__vtype_beam_structures_Beam_structure_t' (the vtabs and vtypes are always imported when loading a module).
[Bug c++/59598] very simple code using file open for read
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59598
Denis Kolesnik denis.v.koles...@safe-mail.net changed:
What|Removed |Added
Status|RESOLVED|UNCONFIRMED
Resolution|INVALID |---
--- Comment #34 from Denis Kolesnik denis.v.koles...@safe-mail.net ---
// a small text file filter.c //
#include stdio.h
main(int argc, char* argv[])
{
char c, previous_c;
int word_begin_position[3000];
//int spec_symbol[7]={0xAE,0xBB,0xAB,0xA9,0x22,0x2F,0x27};
//int eof_symbol[2]={0x0D,0x0A};
int search_result;
int this_is_the_same_word;
int words_count;
int word_number;
int search_result_A_count;
int search_result_space;
FILE *stream,*stream2;
int i, j, characters_count, character_number;
int other_character_printed;
// double characters
int A_count, E_count;
characters_count=0;
stream = fopen (argv[1],r);
while ((c = fgetc(stream)) != EOF)
{
characters_count++;
}
fclose(stream);
//printf(total characters are %i\n, characters_count);
character_number=1;
words_count=0;
previous_c=0;
stream = fopen (argv[1],r);
while ((c = fgetc(stream)) != EOF)
{
if(((c!=0x20) (character_number==1)) || ((previous_c==0x20)
(c!=0x20) (c!=0x0A)) || ((previous_c!=0x20) (c==0x0D)) || ((c!=0x20)
(c!=0x0D) (c!=0x0A) (previous_c==0x0A)) || ((previous_c!=0x20)
(previous_c!=0x0A) (character_number==characters_count) (c==0x20)))
//1. ((c!=0x20) (character_number==1))
//2. ((previous_c==0x20) (c!=0x20) (c!=0x0A))
//3. ((previous_c!=0x20) (c==0x0D))
//!((previous_c!=0x0D) (c==0x0A))
//4. ((c!=0x20) (c!=0x0D) (c!=0x0A) (previous_c==0x0A))
//5. ((previous_c!=0x20) (previous_c!=0x0A)
(character_number==characters_count) (c==0x20))
this_is_the_same_word=0;
else
this_is_the_same_word=1;
if(this_is_the_same_word==0)
{
words_count++;
word_begin_position[words_count]=character_number;
//printf( the begin char is .
%i,word_begin_position[words_count]);
}
//if(character_number==characters_count)
//printf(the last character);
/*
printf( the number of words is %i\n, words_count);
printf( the current character is . %c\n, c);
if(c==0x0D)
printf( the current character is . 0x0D\n);
if(c==0x0A)
printf( the current character is . 0x0A\n);
*/
previous_c=c;
character_number++;
}
fclose(stream);
word_number=1;
character_number=1;
A_count=1;
E_count=1;
stream = fopen (argv[1],r);
//stream2 = fopen (argv[2],w);
while ((c = fgetc(stream)) != EOF)
{
other_character_printed=0;
if(words_count=2)
if(word_numberwords_count-1)
if((character_number = word_begin_position[word_number])
(character_number word_begin_position[word_number+1]))
{
A_count=1;
E_count=1;
word_number++;
}
//printf(\n the word begin position
%i\n,word_begin_position[word_number]);
//printf(\n1 char is %i\n, character_number);
//printf(\nthe words count is %i\n, words_count);
// A
if((other_character_printed==0) ((c=='a') || (c=='а') || (c=='A') ||
(c=='А')) )
if(A_count==1)
{
printf(A1);
A_count=2;
other_character_printed=1;
}
else
{
printf(A2);
A_count=1;
other_character_printed=1;
}
else
if((other_character_printed==0) ((c!='е') (c!='e') (c!='Е')
(c!='E')))
{
printf(%c, c);
other_character_printed=1;
}
// E
if((other_character_printed==0) ((c=='e') || (c=='е') || (c=='E') ||
(c=='Е')) )
if(E_count==1)
{
printf(E1);
E_count=2;
other_character_printed=1;
}
else
{
printf(E2);
E_count=1;
other_character_printed=1;
}
else
if((other_character_printed==0) ((c!='a') (c!='а') (c!='А')
(c!='A')))
{
printf(%c, c);
other_character_printed=1;
}
//if(c=='0')
//{
//printf(%c, c);
//other_character_printed=1;
//}
character_number++;
}
fclose(stream);
//printf( the number of words is %i, words_count);
return 0;
}
[Bug target/59968] Unused BT patterns
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59968
--- Comment #6 from H.J. Lu hjl.tools at gmail dot com ---
For
int
__attribute__((noinline))
foo1 (int x, int y)
{
int z;
z = x (1 y);
x |= 1 y;
x = ~z;
return x;
}
we generate:
movl%esi, %ecx
movl$1, %edx
sall%cl, %edx
movl%edx, %eax
orl%edi, %eax
andl%edx, %edi
notl%edi
andl%edi, %eax
ret
I expect:
movl%edi, %eax
btc %esi, %eax
ret
[Bug c++/59598] very simple code using file open for read
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59598 --- Comment #35 from Denis Kolesnik denis.v.koles...@safe-mail.net --- it works with every russian letter except small letter ya, I consider it as a bug.
[Bug target/59968] Unused BT patterns
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59968
--- Comment #7 from H.J. Lu hjl.tools at gmail dot com ---
For
int
__attribute__((noinline))
foo1 (int x, int y)
{
x = ~(1 y);
return x;
}
we generate
movl%esi, %ecx
movl$-2, %eax
roll%cl, %eax
andl%edi, %eax
ret
I expect
movl%edi, %eax
btr %esi, %eax
ret
[Bug fortran/59941] [4.7 Regression] [OOP] ICE with polymorphic types
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59941 --- Comment #11 from janus at gcc dot gnu.org --- The reason why the ICE is gone in 4.8 is that 'replace_comp' was completely removed in r195562 (for PR 54107). However this commit is a bit too heavy for a backport, I guess.
[Bug fortran/59941] [4.7 Regression] [OOP] ICE with polymorphic types
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59941
janus at gcc dot gnu.org changed:
What|Removed |Added
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |janus at gcc dot gnu.org
--- Comment #12 from janus at gcc dot gnu.org ---
Here is a more lightweight fix (pretty much straightforward):
Index: gcc/fortran/expr.c
===
--- gcc/fortran/expr.c(revision 207198)
+++ gcc/fortran/expr.c(working copy)
@@ -4195,7 +4195,7 @@ replace_comp (gfc_expr *expr, gfc_symbol *sym, int
gfc_component *comp;
comp = (gfc_component *)sym;
if ((expr-expr_type == EXPR_VARIABLE
- || (expr-expr_type == EXPR_FUNCTION
+ || (expr-expr_type == EXPR_FUNCTION !expr-value.function.isym
!gfc_is_intrinsic (expr-symtree-n.sym, 0, expr-where)))
expr-symtree-n.sym-ns == comp-ts.interface-formal_ns)
{
Removes the ICE on comment 0, comment 5 and comment 7.
[Bug target/59968] Unused BT patterns
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59968
--- Comment #8 from H.J. Lu hjl.tools at gmail dot com ---
For
int bar1;
void
__attribute__((noinline))
foo1 (int y)
{
if (!(bar1 (1 y)))
bar1 |= 1 y;
}
we generate
movlbar1(%rip), %eax
btl%edi, %eax
jc.L1
movl$1, %edx
movl%edi, %ecx
sall%cl, %edx
orl%edx, %eax
movl%eax, bar1(%rip)
.L1:
rep ret
I expect:
bts %edi, bar2(%rip)
ret
[Bug tree-optimization/59932] spurious undefined behavior warning on valid code
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59932 --- Comment #6 from Zhendong Su su at cs dot ucdavis.edu --- Thanks for your explanation Jakub. It's more clear now, but I still don't fully understand the difference in behavior from 4.8 to the current trunk. Is it because 4.8's support for warning undefined behaviors is weaker than 4.9's, and with that enhanced support, 4.9 sometimes gives false warnings like the one reported here?
[Bug target/59968] Unused BT patterns
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59968
--- Comment #9 from H.J. Lu hjl.tools at gmail dot com ---
For
int bar1;
void
__attribute__((noinline))
foo1 (int y)
{
if (!(bar1 (1 y)))
{
bar1 |= 1 y;
xxx1 ();
}
}
we generate
.cfi_startproc
movlbar1(%rip), %eax
btl%edi, %eax
jnc.L5
rep ret
.p2align 4,,10
.p2align 3
.L5:
movl$1, %edx
movl%edi, %ecx
sall%cl, %edx
orl%edx, %eax
movl%eax, bar1(%rip)
jmpxxx1
I expect
bts %edi, bar2(%rip)
jc .L7
jmpxxx2
.L8:
.p2align 4,,10
.p2align 3
.L7:
rep ret
[Bug target/59968] Unused BT patterns
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59968
--- Comment #10 from H.J. Lu hjl.tools at gmail dot com ---
For
int bar1;
void
__attribute__((noinline))
foo1 (int y)
{
if ((bar1 (1 y)))
{
bar1 = ~(1 y);
xxx1 ();
}
}
we generate
movlbar1(%rip), %eax
btl%edi, %eax
jc.L5
rep ret
.p2align 4,,10
.p2align 3
.L5:
movl$-2, %edx
movl%edi, %ecx
roll%cl, %edx
andl%edx, %eax
movl%eax, bar1(%rip)
jmpxxx1
I expect
btr %edi, bar2(%rip)
jnc .L7
jmpxxx2
.L8:
.p2align 4,,10
.p2align 3
.L7:
rep ret
[Bug target/59968] Unused BT patterns
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59968
--- Comment #11 from H.J. Lu hjl.tools at gmail dot com ---
For
int bar1;
void
__attribute__((noinline))
foo1 (int y)
{
if ((bar1 (1 y)))
bar1 = ~(1 y);
}
we generate
.cfi_startproc
movlbar1(%rip), %eax
btl%edi, %eax
jnc.L1
movl$-2, %edx
movl%edi, %ecx
roll%cl, %edx
andl%edx, %eax
movl%eax, bar1(%rip)
.L1:
rep ret
I expect
btr %edi, bar2(%rip)
ret
[Bug middle-end/59679] gcc version 4.7.3 and gcc version 4.5.3 cause an unaligned access exception on NetBSD/Alpha
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59679 Uroš Bizjak ubizjak at gmail dot com changed: What|Removed |Added Component|tree-optimization |middle-end --- Comment #15 from Uroš Bizjak ubizjak at gmail dot com --- (In reply to Uroš Bizjak from comment #13) Confirmed as tree-optimization problem on 4.9 branch. Actually, a middle-end problem, if at all. With -ftree-ter, expand creates a couple of unaligned loads to arg0: (insn 101 100 102 (set (reg:SI 150) (mem:SI (reg/v/f:DI 115 [ arg0 ]) [0 S4 A8])) scope-reduced.c:60 -1 (nil)) ... (insn 105 104 106 17 (set (mem:SI (reg/v/f:DI 115 [ arg0 ]) [0 S4 A8]) (reg:SI 151)) scope-reduced.c:60 -1 (nil))
[Bug middle-end/59679] gcc version 4.7.3 and gcc version 4.5.3 cause an unaligned access exception on NetBSD/Alpha
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59679 --- Comment #16 from Uroš Bizjak ubizjak at gmail dot com --- (In reply to Uroš Bizjak from comment #15) (In reply to Uroš Bizjak from comment #13) Confirmed as tree-optimization problem on 4.9 branch. Actually, a middle-end problem, if at all. With -ftree-ter, expand creates a couple of unaligned loads to arg0: s/loads/moves/
[Bug target/59968] Unused BT patterns
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59968
--- Comment #12 from H.J. Lu hjl.tools at gmail dot com ---
For
int bar1;
void
__attribute__((noinline))
foo1 (int y)
{
int z;
if (!(bar1 (1 y)))
xxx1 ();
z = bar1 (1 y);
bar1 |= 1 y;
bar1 = ~z;
}
we generate
movlbar1(%rip), %edx
pushq%rbx
.cfi_def_cfa_offset 16
.cfi_offset 3, -16
movl%edi, %ebx
btl%edi, %edx
jc.L3
callxxx1
movlbar1(%rip), %edx
.L3:
movl%ebx, %ecx
movl$1, %eax
sall%cl, %eax
movl%edx, %ecx
andl%eax, %ecx
orl%edx, %eax
notl%ecx
andl%ecx, %eax
movl%eax, bar1(%rip)
popq%rbx
.cfi_def_cfa_offset 8
ret
I expect
btc %edi, bar2(%rip)
jc .L7
jmpxxx2
.L8:
.p2align 4,,10
.p2align 3
.L7:
rep ret
[Bug target/59968] Unused BT patterns
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59968 --- Comment #13 from Uroš Bizjak ubizjak at gmail dot com --- (In reply to H.J. Lu from comment #8) I expect: bts %edi, bar2(%rip) Did you see Comment #3?
[Bug c++/58701] [4.9 Regression] [c++11] ICE initializing member of static union
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58701 Jason Merrill jason at gcc dot gnu.org changed: What|Removed |Added Status|NEW |ASSIGNED Assignee|unassigned at gcc dot gnu.org |jason at gcc dot gnu.org
[Bug target/59968] Unused BT patterns
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59968 --- Comment #14 from Uroš Bizjak ubizjak at gmail dot com --- From i386.md: ;; %%% bts, btr, btc, bt. ;; In general these instructions are *slow* when applied to memory, ;; since they enforce atomic operation. When applied to registers, ;; it depends on the cpu implementation. They're never faster than ;; the corresponding and/ior/xor operations, so with 32-bit there's ;; no point. But in 64-bit, we can't hold the relevant immediates ;; within the instruction itself, so operating on bits in the high ;; 32-bits of a register becomes easier. ;; ;; These are slow on Nocona, but fast on Athlon64. We do require the use ;; of btrq and btcq for corner cases of post-reload expansion of absdf and ;; negdf respectively, so they can never be disabled entirely.
[Bug c++/59916] [4.9 Regression] constructors and destructors can cause control reaches end of non-void function warnings with -Os
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59916 Jason Merrill jason at gcc dot gnu.org changed: What|Removed |Added CC||jason at gcc dot gnu.org --- Comment #3 from Jason Merrill jason at gcc dot gnu.org --- (In reply to Richard Biener from comment #2) retval = B::B (this, 0, __vtt_parm); That assigns to the RESULT_DECL, which should count as a return.
[Bug c++/59818] [4.9 regression] Bogus error: call of overloaded .... is ambiguous
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59818 Jason Merrill jason at gcc dot gnu.org changed: What|Removed |Added Status|NEW |ASSIGNED Assignee|unassigned at gcc dot gnu.org |jason at gcc dot gnu.org
[Bug libstdc++/59656] weak_ptr::lock function crashes when compiling with -fno-exceptions flag
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59656 --- Comment #11 from ppluzhnikov at gcc dot gnu.org --- Author: ppluzhnikov Date: Tue Jan 28 19:08:00 2014 New Revision: 207201 URL: http://gcc.gnu.org/viewcvs?rev=207201root=gccview=rev Log: For Google b/12533273 and PR 59656, partially backport r207180 from trunk. (The new test: libstdc++-v3/testsuite/20_util/shared_ptr/cons/void_neg.cc is not added, because it succeeds to compile with gcc-4_8.) Modified: branches/google/gcc-4_8/libstdc++-v3/include/bits/shared_ptr.h branches/google/gcc-4_8/libstdc++-v3/include/bits/shared_ptr_base.h branches/google/gcc-4_8/libstdc++-v3/testsuite/20_util/shared_ptr/cons/43820_neg.cc
[Bug middle-end/59261] [4.9 regression] FAIL: gcc.dg/vect/bb-slp-26.c -flto -ffat-lto-objects (internal compiler error)
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59261 Jeffrey A. Law law at redhat dot com changed: What|Removed |Added Priority|P1 |P2 Status|UNCONFIRMED |NEW Last reconfirmed||2014-01-28 Ever confirmed|0 |1 --- Comment #6 from Jeffrey A. Law law at redhat dot com --- Thanks. I've managed to reproduce the failure using those intermediate files. However, I haven't managed to trigger the failure directly from source. What's happening is we're getting into expand_shift_1: Breakpoint 3, expand_shift_1 (code=LSHIFT_EXPR, mode=V8QImode, shifted=0x2416e0e0, amount=0x24010410, target=0x0, unsignedp=0) The amount is (const_int 1) V8Q8mode isn't a valid shift mode for the ia64 target (mode iterator for the shifts uses VECINT24). Since there isn't a pattern for this, no libcall and the generic bits don't know how to synthesize the shift, we trip the assertion and die. We get into this code trying to expand: mult_expr 0x2414cac8 type vector_type 0x241513b0 type integer_type 0x240e2028 public unsigned QI size integer_cst 0x24029b80 constant 8 unit size integer_cst 0x24029ba0 constant 1 align 8 symtab 0 alias set 0 canonical type 0x240e2028 precision 8 min integer_cst 0x2402b300 0 max integer_cst 0x2402b320 255 unsigned V8QI size integer_cst 0x240299c0 constant 64 unit size integer_cst 0x240299e0 constant 8 align 64 symtab 0 alias set -1 canonical type 0x241513b0 nunits 8 arg 0 ssa_name 0x24142178 type vector_type 0x241513b0 visited var var_decl 0x2401dc80 vect__34.18def_stmt vect__34.18_241 = VIEW_CONVERT_EXPRvector(8) unsigned char(vect__33.17_242); version 241 arg 1 vector_cst 0x2413e300 type vector_type 0x241513b0 constant elt0: integer_cst 0x2402b500 constant 3 elt1: integer_cst 0x2402b500 3 elt2: integer_cst 0x2402b500 3 elt3: integer_cst 0x2402b500 3 elt4: integer_cst 0x2402b500 3 elt5: integer_cst 0x2402b500 3 elt6: integer_cst 0x2402b500 3 elt7: integer_cst 0x2402b500 3 ../gcc/testsuite/gcc.dg/vect/bb-slp-26.c:19:14 Clearly expanding a V8QImode multiply using a shift is a bad idea on Itanic. What I don't see is how to stop the code form using shifts like this. Regardless, the bug is confirmed, but given it's Itanic, it's certainly not worthy of P1 status.
[Bug fortran/59414] [4.8/4.9 Regression] [OOP] ICE in in gfc_conv_expr_descriptor on ALLOCATE inside SELECT TYPE
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59414 --- Comment #16 from Paul Thomas pault at gcc dot gnu.org --- Author: pault Date: Tue Jan 28 20:10:22 2014 New Revision: 207204 URL: http://gcc.gnu.org/viewcvs?rev=207204root=gccview=rev Log: 2014-01-28 Paul Thomas pa...@gcc.gnu.org PR fortran/59414 * trans-stmt.c (gfc_trans_allocate): Before the pointer assignment to transfer the source _vptr to a class allocate expression, the final class reference should be exposed. The tail that includes the _data and array references is stored. This reduced expression is transferred to 'lhs' and the _vptr added. Then the tail is restored to the allocate expression. 2014-01-28 Paul Thomas pa...@gcc.gnu.org PR fortran/59414 * gfortran.dg/allocate_class_3.f90 : New test Added: trunk/gcc/testsuite/gfortran.dg/allocate_class_3.f90 trunk/gcc/testsuite/gfortran.dg/elemental_by_value_1.f90 Modified: trunk/gcc/fortran/ChangeLog trunk/gcc/fortran/trans-stmt.c trunk/gcc/testsuite/ChangeLog
[Bug fortran/59414] [4.8 Regression] [OOP] ICE in in gfc_conv_expr_descriptor on ALLOCATE inside SELECT TYPE
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59414 Paul Thomas pault at gcc dot gnu.org changed: What|Removed |Added Summary|[4.8/4.9 Regression] [OOP] |[4.8 Regression] [OOP] ICE |ICE in in |in in |gfc_conv_expr_descriptor on |gfc_conv_expr_descriptor on |ALLOCATE inside SELECT TYPE |ALLOCATE inside SELECT TYPE --- Comment #17 from Paul Thomas pault at gcc dot gnu.org --- (In reply to Paul Thomas from comment #16) Author: pault Date: Tue Jan 28 20:10:22 2014 New Revision: 207204 ...snip... trunk/gcc/testsuite/gfortran.dg/elemental_by_value_1.f90 This was accidental and was removed in r207205. Sorry about the noise. Paul
[Bug c++/58632] [4.8/4.9 Regression] ICE reusing template parameter name as class name
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58632 --- Comment #3 from Jason Merrill jason at gcc dot gnu.org --- Author: jason Date: Tue Jan 28 21:04:29 2014 New Revision: 207208 URL: http://gcc.gnu.org/viewcvs?rev=207208root=gccview=rev Log: PR c++/58632 * decl.c (lookup_and_check_tag): Ignore template parameters if scope == ts_current. * pt.c (check_template_shadow): Don't complain about the injected class name. Added: trunk/gcc/testsuite/g++.dg/template/shadow1.C Modified: trunk/gcc/cp/ChangeLog trunk/gcc/cp/decl.c trunk/gcc/cp/pt.c
[Bug c++/58701] [4.9 Regression] [c++11] ICE initializing member of static union
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58701 --- Comment #8 from Jason Merrill jason at gcc dot gnu.org --- Author: jason Date: Tue Jan 28 21:04:44 2014 New Revision: 207209 URL: http://gcc.gnu.org/viewcvs?rev=207209root=gccview=rev Log: PR c++/58701 * semantics.c (build_anon_member_initialization): Stop walking when we run out of COMPONENT_REFs. Added: trunk/gcc/testsuite/g++.dg/cpp0x/nsdmi-union5.C Modified: trunk/gcc/cp/ChangeLog trunk/gcc/cp/semantics.c
[Bug middle-end/59970] New: Bogus warnings at low optimization levels
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59970 Bug ID: 59970 Summary: Bogus warnings at low optimization levels Product: gcc Version: unknown Status: UNCONFIRMED Severity: minor Priority: P3 Component: middle-end Assignee: tschwinge at gcc dot gnu.org Reporter: tschwinge at gcc dot gnu.org Build: x86_64-linux-gnu Created attachment 31970 -- http://gcc.gnu.org/bugzilla/attachment.cgi?id=31970action=edit cp-demangle.c The attached code is greatly reduced from libiberty/cp-demangle.c. As discussed in http://news.gmane.org/find-root.php?message_id=%3C87bnyw41hf.fsf%40kepler.schwinge.homeip.net%3E, with trunk r207200, it exhibits the following behavior: $ for t in '' -DTOGGLE1; do for a in '' -DABORT; do for o in -O0 -Og -O1 -O2 -O3 -Ofast; do (set -x gcc/xgcc -Bgcc/ -Wall -Wextra -c ../../cp-demangle.c $t $a $o); done; done; done + gcc/xgcc -Bgcc/ -Wall -Wextra -c ../../cp-demangle.c -O0 + gcc/xgcc -Bgcc/ -Wall -Wextra -c ../../cp-demangle.c -Og ../../cp-demangle.c: In function 'd_demangle_callback': ../../cp-demangle.c:40:3: warning: 'dc' may be used uninitialized in this function [-Wmaybe-uninitialized] return dc; ^ + gcc/xgcc -Bgcc/ -Wall -Wextra -c ../../cp-demangle.c -O1 + gcc/xgcc -Bgcc/ -Wall -Wextra -c ../../cp-demangle.c -O2 + gcc/xgcc -Bgcc/ -Wall -Wextra -c ../../cp-demangle.c -O3 + gcc/xgcc -Bgcc/ -Wall -Wextra -c ../../cp-demangle.c -Ofast + gcc/xgcc -Bgcc/ -Wall -Wextra -c ../../cp-demangle.c -DABORT -O0 + gcc/xgcc -Bgcc/ -Wall -Wextra -c ../../cp-demangle.c -DABORT -Og + gcc/xgcc -Bgcc/ -Wall -Wextra -c ../../cp-demangle.c -DABORT -O1 + gcc/xgcc -Bgcc/ -Wall -Wextra -c ../../cp-demangle.c -DABORT -O2 + gcc/xgcc -Bgcc/ -Wall -Wextra -c ../../cp-demangle.c -DABORT -O3 + gcc/xgcc -Bgcc/ -Wall -Wextra -c ../../cp-demangle.c -DABORT -Ofast + gcc/xgcc -Bgcc/ -Wall -Wextra -c ../../cp-demangle.c -DTOGGLE1 -O0 + gcc/xgcc -Bgcc/ -Wall -Wextra -c ../../cp-demangle.c -DTOGGLE1 -Og ../../cp-demangle.c: In function 'd_demangle_callback': ../../cp-demangle.c:40:3: warning: 'dc' may be used uninitialized in this function [-Wmaybe-uninitialized] return dc; ^ + gcc/xgcc -Bgcc/ -Wall -Wextra -c ../../cp-demangle.c -DTOGGLE1 -O1 ../../cp-demangle.c: In function 'd_demangle_callback': ../../cp-demangle.c:40:3: warning: 'dc' may be used uninitialized in this function [-Wmaybe-uninitialized] return dc; ^ + gcc/xgcc -Bgcc/ -Wall -Wextra -c ../../cp-demangle.c -DTOGGLE1 -O2 + gcc/xgcc -Bgcc/ -Wall -Wextra -c ../../cp-demangle.c -DTOGGLE1 -O3 + gcc/xgcc -Bgcc/ -Wall -Wextra -c ../../cp-demangle.c -DTOGGLE1 -Ofast + gcc/xgcc -Bgcc/ -Wall -Wextra -c ../../cp-demangle.c -DTOGGLE1 -DABORT -O0 + gcc/xgcc -Bgcc/ -Wall -Wextra -c ../../cp-demangle.c -DTOGGLE1 -DABORT -Og + gcc/xgcc -Bgcc/ -Wall -Wextra -c ../../cp-demangle.c -DTOGGLE1 -DABORT -O1 + gcc/xgcc -Bgcc/ -Wall -Wextra -c ../../cp-demangle.c -DTOGGLE1 -DABORT -O2 + gcc/xgcc -Bgcc/ -Wall -Wextra -c ../../cp-demangle.c -DTOGGLE1 -DABORT -O3 + gcc/xgcc -Bgcc/ -Wall -Wextra -c ../../cp-demangle.c -DTOGGLE1 -DABORT -Ofast In certain cases, GCC fails to track that all the possible values for enum type indeed have been covered, and so dc must have been initialized. It does seem appropriate to me for GCC not to do such tracking at low optimization levels, but then the uninitialized warning should also be disabled (which I assume is happening for -O0?) to avoid false positive warnings. The abort to libiberty/cp-demangle.c has been added in r207200. The libgomp/env.c change r203514 looks like another instance of this issue, http://news.gmane.org/find-root.php?message_id=%3C20131014082733.GF30970%40tucnak.zalov.cz%3E. I'm assigning this to me, tentatively, low priority, so if someone has any clues, don't hesititate to take it over.
[Bug c++/58616] [meta-bug] nsdmi
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58616 Bug 58616 depends on bug 58701, which changed state. Bug 58701 Summary: [4.9 Regression] [c++11] ICE initializing member of static union http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58701 What|Removed |Added Status|ASSIGNED|RESOLVED Resolution|--- |FIXED
[Bug c++/58701] [4.9 Regression] [c++11] ICE initializing member of static union
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58701 Jason Merrill jason at gcc dot gnu.org changed: What|Removed |Added Status|ASSIGNED|RESOLVED Resolution|--- |FIXED --- Comment #9 from Jason Merrill jason at gcc dot gnu.org --- Fixed.
[Bug testsuite/59971] New: multilib_flags is placed with the wrong order
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59971
Bug ID: 59971
Summary: multilib_flags is placed with the wrong order
Product: gcc
Version: 4.9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: testsuite
Assignee: unassigned at gcc dot gnu.org
Reporter: hjl.tools at gmail dot com
Some testcases need explicit GCC options to properly run, like
gcc.target/i386/sse2-init-v2di-2.c has
/* { dg-options -O2 -msse4 -march=core2 -dp } */
-march=core2 is specified explicitly. But with multlib, we get
[hjl@gnu-18 gcc]$ make check-gcc RUNTESTFLAGS=--target_board='unix{-march=k8}'
i386.exp=sse2-init-v2di-2.c
make[1]: Entering directory `/export/build/gnu/gcc/build-x86_64-linux/gcc'
test -d plugin || mkdir plugin
test -d testsuite || mkdir testsuite
test -d testsuite/gcc || mkdir testsuite/gcc
(rootme=`${PWDCMD-pwd}`; export rootme; \
srcdir=`cd /export/gnu/import/git/gcc/gcc; ${PWDCMD-pwd}` ; export srcdir ; \
cd testsuite/gcc; \
rm -f tmp-site.exp; \
sed '/set tmpdir/ s|testsuite$|testsuite/gcc|' \
../../site.exp tmp-site.exp; \
/bin/sh ${srcdir}/../move-if-change tmp-site.exp site.exp; \
EXPECT=`if [ -f ${rootme}/../expect/expect ] ; then echo
${rootme}/../expect/expect ; else echo expect ; fi` ; export EXPECT ; \
if [ -f ${rootme}/../expect/expect ] ; then \
TCL_LIBRARY=`cd .. ; cd ${srcdir}/../tcl/library ; ${PWDCMD-pwd}` ; \
export TCL_LIBRARY ; fi ; \
runtestflags= ; \
if [ -n ] ; then \
runtestflags=; \
elif [ -n ] ; then \
parts=`echo ' ' \
| sed 's/=[^ ]* / /g'`; \
for part in `find $srcdir/testsuite/gcc* -name \*.exp` ; do \
part=`basename $part` ; \
case $parts $runtestflags in \
* $part *) ;; \
*) runtestflags=$runtestflags $part ;; \
esac ; \
done ; \
fi ; \
`if [ -f ${srcdir}/../dejagnu/runtest ] ; then echo
${srcdir}/../dejagnu/runtest ; else echo runtest; fi` --tool gcc
--target_board='unix{-march=k8}' i386.exp=sse2-init-v2di-2.c $runtestflags)
WARNING: Couldn't find the global config file.
Test Run By hjl on Tue Jan 28 12:40:33 2014
Native configuration is x86_64-unknown-linux-gnu
=== gcc tests ===
Schedule of variations:
unix/-march=k8
Running target unix/-march=k8
Using /usr/share/dejagnu/baseboards/unix.exp as board description file for
target.
Using /usr/share/dejagnu/config/unix.exp as generic interface file for target.
Using /export/gnu/import/git/gcc/gcc/testsuite/config/default.exp as
tool-and-target-specific interface file.
Running /export/gnu/import/git/gcc/gcc/testsuite/gcc.target/i386/i386.exp ...
FAIL: gcc.target/i386/sse2-init-v2di-2.c scan-assembler-times vec_concatv2di/3
1
=== gcc Summary ===
# of expected passes11
# of unexpected failures1
/export/build/gnu/gcc/build-x86_64-linux/gcc/xgcc version 4.9.0 20140128
(experimental) (GCC)
make[1]: [check-parallel-gcc] Error 1 (ignored)
make[1]: Leaving directory `/export/build/gnu/gcc/build-x86_64-linux/gcc'
The problem is -march=k8 is placed after -march=core2:
[hjl@gnu-18 gcc]$ grep gcc.target/i386/sse2-init-v2di-2.c
testsuite/gcc/gcc.log
Executing on host: /export/build/gnu/gcc/build-x86_64-linux/gcc/xgcc
-B/export/build/gnu/gcc/build-x86_64-linux/gcc/
/export/gnu/import/git/gcc/gcc/testsuite/gcc.target/i386/sse2-init-v2di-2.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -O2 -msse4 -march=core2
-dp -ffat-lto-objects -S -march=k8 -o sse2-init-v2di-2.s(timeout = 300)
spawn -ignore SIGHUP /export/build/gnu/gcc/build-x86_64-linux/gcc/xgcc
-B/export/build/gnu/gcc/build-x86_64-linux/gcc/
/export/gnu/import/git/gcc/gcc/testsuite/gcc.target/i386/sse2-init-v2di-2.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -O2 -msse4 -march=core2
-dp -ffat-lto-objects -S -march=k8 -o sse2-init-v2di-2.s
PASS: gcc.target/i386/sse2-init-v2di-2.c (test for excess errors)
FAIL: gcc.target/i386/sse2-init-v2di-2.c scan-assembler-times vec_concatv2di/3
1
[hjl@gnu-18 gcc]$
It is done by target.exp in dejagnu:
if {[board_info $dest exists multilib_flags]} {
append add_flags [board_info $dest multilib_flags]
}
It doesn't work well with such gcc testcases. It works if we change it to
if {[board_info $dest exists multilib_flags]} {
set add_flags [board_info $dest multilib_flags] $add_flags
}
[Bug debug/59575] [4.9 regression] ICE in maybe_record_trace_start, at dwarf2cfi.c:2239
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59575
--- Comment #20 from Ryan Mansfield rmansfield at qnx dot com ---
Sorry, can't reproduce. Can you run it in the debugger
p debug_rtx (p)
up
p debug_rtx (insn)
?
Sorry for the delay.
Starting program: /home/ryan/gnu/gcc/trunk/arm-eabi/gcc/./cc1 -fexceptions
/home/ryan/conftest.c
foo
Analyzing compilation unit
Performing interprocedural optimizations
*free_lang_data visibility early_local_cleanups *free_inline_summary
whole-program inlineAssembling functions:
foo
Program received signal SIGSEGV, Segmentation fault.
0x00c285e2 in arm_unwind_emit_sequence (asm_out_file=0x165d930,
p=0x76dd20a0) at ../../gcc/config/arm/arm.c:28728
28728 e = XEXP (SET_DEST (e), 0);
(gdb) p debug_rtx(p)
(sequence [
(set/f (reg/f:SI 13 sp)
(plus:SI (reg/f:SI 13 sp)
(const_int -16 [0xfff0])))
(set/f (mem/c:SI (reg/f:SI 13 sp) [0 S4 A32])
(reg:SI 4 r4))
(set/f (mem/c:SI (plus:SI (reg/f:SI 13 sp)
(const_int 4 [0x4])) [0 S4 A32])
(reg:SI 5 r5))
(set/f (mem/c:SI (plus:SI (reg/f:SI 13 sp)
(const_int 8 [0x8])) [0 S4 A32])
(reg/f:SI 11 fp))
(set/f (mem/c:SI (plus:SI (reg/f:SI 13 sp)
(const_int 12 [0xc])) [0 S4 A32])
(reg:SI 14 lr))
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
])
$2 = void
(gdb) up
#1 0x00c2905e in arm_unwind_emit (asm_out_file=0x165d930,
insn=0x76dd31f8) at ../../gcc/config/arm/arm.c:28969
28969 arm_unwind_emit_sequence (asm_out_file, pat);
(gdb) p debug_rtx(insn)
(insn/f 65 3 66 (parallel [
(set (mem/c:BLK (pre_modify:SI (reg/f:SI 13 sp)
(plus:SI (reg/f:SI 13 sp)
(const_int -16 [0xfff0]))) [0 A8])
(unspec:BLK [
(reg:SI 4 r4)
] UNSPEC_PUSH_MULT))
(use (reg:SI 5 r5))
(use (reg/f:SI 11 fp))
(use (reg:SI 14 lr))
]) /home/ryan/conftest.c:4 341 {*push_multi}
(expr_list:REG_FRAME_RELATED_EXPR (sequence [
(set/f (reg/f:SI 13 sp)
(plus:SI (reg/f:SI 13 sp)
(const_int -16 [0xfff0])))
(set/f (mem/c:SI (reg/f:SI 13 sp) [0 S4 A32])
(reg:SI 4 r4))
(set/f (mem/c:SI (plus:SI (reg/f:SI 13 sp)
(const_int 4 [0x4])) [0 S4 A32])
(reg:SI 5 r5))
(set/f (mem/c:SI (plus:SI (reg/f:SI 13 sp)
(const_int 8 [0x8])) [0 S4 A32])
(reg/f:SI 11 fp))
(set/f (mem/c:SI (plus:SI (reg/f:SI 13 sp)
(const_int 12 [0xc])) [0 S4 A32])
(reg:SI 14 lr))
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
(nil)
])
(nil)))
$3 = void
[Bug tree-optimization/59970] Bogus warnings at low optimization levels
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59970 Andrew Pinski pinskia at gcc dot gnu.org changed: What|Removed |Added Component|middle-end |tree-optimization --- Comment #1 from Andrew Pinski pinskia at gcc dot gnu.org --- I don't think this is a GCC bug except for the unitialized predicates is not working. The reason why it fails for -Og is because jump threading is disabled as you want to be able to step through the code. -O1 must not decided jump threading is profitable either. For the unitialized predicates issue, it might be because switch statements are not handled.
[Bug c++/58632] [4.8/4.9 Regression] ICE reusing template parameter name as class name
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58632 --- Comment #5 from Jason Merrill jason at gcc dot gnu.org --- Author: jason Date: Tue Jan 28 21:33:55 2014 New Revision: 207213 URL: http://gcc.gnu.org/viewcvs?rev=207213root=gccview=rev Log: PR c++/58632 * decl.c (lookup_and_check_tag): Ignore template parameters if scope == ts_current. * pt.c (check_template_shadow): Don't complain about the injected class name. Added: branches/gcc-4_8-branch/gcc/testsuite/g++.dg/template/shadow1.C Modified: branches/gcc-4_8-branch/gcc/cp/ChangeLog branches/gcc-4_8-branch/gcc/cp/decl.c branches/gcc-4_8-branch/gcc/cp/pt.c
[Bug c++/58632] [4.8/4.9 Regression] ICE reusing template parameter name as class name
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58632 Jason Merrill jason at gcc dot gnu.org changed: What|Removed |Added Status|ASSIGNED|RESOLVED Resolution|--- |FIXED --- Comment #4 from Jason Merrill jason at gcc dot gnu.org --- Fixed for 4.8.3/4.9.
[Bug tree-optimization/59932] spurious undefined behavior warning on valid code
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59932 --- Comment #7 from Jakub Jelinek jakub at gcc dot gnu.org --- (In reply to Zhendong Su from comment #6) Thanks for your explanation Jakub. It's more clear now, but I still don't fully understand the difference in behavior from 4.8 to the current trunk. Is it because 4.8's support for warning undefined behaviors is weaker than 4.9's, and with that enhanced support, 4.9 sometimes gives false warnings like the one reported here? 4.8 only warned about this in later passes when the loops have been already constructed and preserved, so it wouldn't warn e.g. if it was cunrolli (as in this case) that found the undefined behavior. GCC 4.9 creates loops immediately after cfg is created and the warning is thus enabled much earlier. This means we warn in more cases when it is desirable to warn, but as this testcase shows also sometimes means there can be false positives. The loop with the undefined behavior is there for many passes, from cunrolli where it warns another 20 passes until dom1 is able to find out the code is dead.
[Bug c++/59818] [4.9 regression] Bogus error: call of overloaded .... is ambiguous
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59818 --- Comment #3 from Jason Merrill jason at gcc dot gnu.org --- Author: jason Date: Tue Jan 28 22:00:05 2014 New Revision: 207215 URL: http://gcc.gnu.org/viewcvs?rev=207215root=gccview=rev Log: PR c++/59818 * pt.c (tsubst_function_type): Make sure we keep the same function quals. Added: trunk/gcc/testsuite/g++.dg/template/ptrmem24.C Modified: trunk/gcc/cp/ChangeLog trunk/gcc/cp/pt.c
[Bug middle-end/55500] [devirt] trunk fails inline-devirt test #7
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55500 --- Comment #4 from Matt Hargett matt at use dot net --- Phillip, the problem is not that the program doesn't run properly. It's that the code isn't inline via de-virtualization when it could be. The main() should contain a few printf/puts calls and nothing more.
[Bug target/59968] Unused BT patterns
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59968 --- Comment #15 from H.J. Lu hjl.tools at gmail dot com --- (In reply to Uroš Bizjak from comment #14) From i386.md: ;; %%% bts, btr, btc, bt. ;; In general these instructions are *slow* when applied to memory, ;; since they enforce atomic operation. When applied to registers, ;; it depends on the cpu implementation. They're never faster than ;; the corresponding and/ior/xor operations, so with 32-bit there's ;; no point. But in 64-bit, we can't hold the relevant immediates ;; within the instruction itself, so operating on bits in the high ;; 32-bits of a register becomes easier. ;; BTx with memory operand are slow, but they have smaller code sizes. We can optimize well for register operand as the first step.
