https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68117
--- Comment #12 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
(In reply to Markus Trippelsdorf from comment #11)
> (In reply to rguent...@suse.de from comment #10)
> > >
> > > Valgrind points to r228599:
> >
> > Nothing obvious but does removing
> >
> > mark_virtual_operands_for_renaming (cfun);
> >
> > help? It's the only thing that may end up releasing SSA names
> > (if only virtuals).
>
> No, it doesn't help. But reverting r228760 and r228599 fixes the issue.
No, reverting r228760 and r228599 doesn't help. So back to square one.
trippels@gcc2-power8 shell % ~//gcc_test/usr/local/bin/c++ -o js -Wall
-Wignored-qualifiers -Wsign-compare -Wtype-limits -Werror=char-subscripts
-Werror=comment -Werror=empty-body -Werror=endif-labels
-Werror=int-to-pointer-cast -Werror=missing-braces -Werror=overloaded-virtual
-Werror=pointer-arith -Werror=reorder -Werror=return-type
-Werror=sequence-point -Werror=switch -Werror=trigraphs -Werror=unknown-pragmas
-Werror=unused-label -Werror=unused-value -Werror=write-strings
-Werror=conversion-null -Wno-invalid-offsetof -Wcast-align -std=c++1z -w
-flto=80 --param lto-partitions=80 -ffunction-sections -fdata-sections
-fno-rtti -fno-exceptions -fno-math-errno -std=gnu++0x -pthread -pipe -DNDEBUG
-DTRIMMED -O3 -fomit-frame-pointer Unified_cpp_js_src_shell0.o
../../../mozglue/build/dummy.o ../../../mfbt/Compression.o
../../../mfbt/Decimal.o ../../../mfbt/Unified_cpp_mfbt0.o -lpthread
-Wl,--hash-style=gnu,--as-needed,--gc-sections,--icf=all -Wl,-z,noexecstack
-Wl,-z,text -Wl,--build-id -Wl,-rpath-link,../../../dist/bin
-Wl,-rpath-link,/home/trippels/moz-build-dir/dist/lib ../libjs_static.a
-rdynamic -lm -ldl -lffi -licui18n -licuuc -licudata -L/usr/lib64 -lplds4
-lplc4 -lnspr4 -lz -lm -ldl
/home/trippels/gecko-dev/js/src/builtin/SIMD.cpp: In function
‘simd_float32x4_reciprocal’:
/home/trippels/gecko-dev/js/src/builtin/SIMD.cpp:1221:1: error: incompatible
types in PHI argument 0
FLOAT32X4_FUNCTION_LIST(DEFINE_SIMD_FLOAT32X4_FUNCTION)
^
unsigned int
struct BarrieredBase *
i_38 = PHI <v_4(D)(10), i_61(12)>
/home/trippels/gecko-dev/js/src/builtin/SIMD.cpp:1221:1: internal compiler
error: verify_gimple failed
0x107448cb verify_gimple_in_cfg(function*, bool)
../../gcc/gcc/tree-cfg.c:5082
0x105ecabf execute_function_todo
../../gcc/gcc/passes.c:1945
0x105ed773 do_per_function
../../gcc/gcc/passes.c:1632
0x105eda9f execute_todo
../../gcc/gcc/passes.c:2000
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
make: *** [/home/trippels/tmp/ccL2JcUK.ltrans5.ltrans.o] Error 1
Adding -r -nostdlib makes it segfault instead:
trippels@gcc2-power8 shell % ~//gcc_test/usr/local/bin/c++ -r -nostdlib -o js
-Wall -Wignored-qualifiers -Wsign-compare -Wtype-limits -Werror=char-subscripts
-Werror=comment -Werror=empty-body -Werror=endif-labels
-Werror=int-to-pointer-cast -Werror=missing-braces -Werror=overloaded-virtual
-Werror=pointer-arith -Werror=reorder -Werror=return-type
-Werror=sequence-point -Werror=switch -Werror=trigraphs -Werror=unknown-pragmas
-Werror=unused-label -Werror=unused-value -Werror=write-strings
-Werror=conversion-null -Wno-invalid-offsetof -Wcast-align -std=c++1z -w
-flto=80 --param lto-partitions=80 -ffunction-sections -fdata-sections
-fno-rtti -fno-exceptions -fno-math-errno -std=gnu++0x -pipe -DNDEBUG -DTRIMMED
-O3 -fomit-frame-pointer Unified_cpp_js_src_shell0.o
../../../mozglue/build/dummy.o ../../../mfbt/Compression.o
../../../mfbt/Decimal.o ../../../mfbt/Unified_cpp_mfbt0.o -lpthread -Wl,-z,text
-Wl,--build-id -Wl,-rpath-link,../../../dist/bin
-Wl,-rpath-link,/home/trippels/moz-build-dir/dist/lib ../libjs_static.a
-rdynamic -lm -ldl -lffi -licui18n -licuuc -licudata -L/usr/lib64 -lplds4
-lplc4 -lnspr4 -lz -lm -ldl
/home/trippels/gecko-dev/js/src/jsgc.cpp: In member function
‘sweepCompartments’:
/home/trippels/gecko-dev/js/src/jsgc.cpp:3420:1: error: invalid PHI argument
Zone::sweepCompartments(FreeOp *fop, bool keepAtleastOne, bool lastGC)
^
<<< Unknown tree: <invalid tree code> >>>
/home/trippels/gecko-dev/js/src/jsgc.cpp:3420:1: internal compiler error:
Segmentation fault
0x106eba33 crash_signal
../../gcc/gcc/toplev.c:336
0x10743ee4 contains_struct_check
../../gcc/gcc/tree.h:3030
0x10743ee4 verify_gimple_phi
../../gcc/gcc/tree-cfg.c:4658
0x10743ee4 verify_gimple_in_cfg(function*, bool)
../../gcc/gcc/tree-cfg.c:4952
0x105ecabf execute_function_todo
../../gcc/gcc/passes.c:1945
0x105ed773 do_per_function
../../gcc/gcc/passes.c:1632
0x105eda9f execute_todo
../../gcc/gcc/passes.c:2000
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
make: *** [/home/trippels/tmp/ccv49A7w.ltrans35.ltrans.o] Error 1
make: *** Waiting for unfinished jobs....
lto-wrapper: fatal error: make returned 2 exit status
I'll see if I can come up with a small testcase.
