On Sat, 2009-01-10 at 15:56 +0100, Richard Guenther wrote: > On Sat, Jan 10, 2009 at 3:33 PM, Laurent GUERBY <laur...@guerby.net> wrote: > > Hi, > > > > It looks like the tests for -frtl-abstract-sequences are either skipped > > or xfailed for a long list of platforms: > > > > http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33642 > > "unrecognizable insn for -frtl-abstract-sequences" > > << > > Almost any source file compiled for any of a large number of targets > > (powerpc*-*, arm-eabi, hppa-linux, mipsel-linux, s390*-linux, sh*-*, > > sparc*-*) > > with -O2 -frtl-abstract-sequences results in the following: > > > > bug1.c: In function 'foo': > > bug1.c:8: error: unrecognizable insn: > > (insn 28bug1.c:8: internal compiler error: Segmentation fault > > Please submit a full bug report, > > with preprocessed source if appropriate. > > See <http://gcc.gnu.org/bugs.html> for instructions. > > > > The testcase used here: > > > > int foo (void) > > { > > return 0; > > } > >>> > > > > gcc/testsuite/gcc.c-torture/compile/pr11832.c > > /* { dg-do compile } */ > > /* Currently ICEs for Alpha, IA64, HPPA, MIPS, CRIS, Xtensa, PowerPC, SH > > and SPARC; see PR33642. */ > > /* { dg-xfail-if "PR33642" { alpha*-*-* hppa*-*-* mips*-*-* powerpc*-*-* > > cris-*-* crisv32-*-* ia64-*-* xtensa*-*-* sh*-*-* sparc*-*-* s390*-*-* } { > > "*" } { "" } } */ > > /* Currently ICEs for (x86 && ilp32 && pic). */ > > /* { dg-xfail-if "PR33642/36240" { { i?86-*-* x86_64-*-* } && { ilp32 && { > > ! nonpic } } } { "*" } { "" } } */ > > > > > > I was about to add arm*-*-* but there are other reports about this flag > > (not exhaustive, just based on summary): > > > > http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30121 > > "ICE on frtl-abstract-sequences" > > > > http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31549 > > "Documentation for -frtl-abstract-sequences is in the wrong place" > > > > http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36240 > > "PIC and -frtl-abstract-sequences" > > > > http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38694 > > "gcc.c-torture/compile/pr11832.c and pr33009.c -frtl-abstract-sequences > > ICE on arm-linux-gnueabi on 4.3.2 and trunk" > > > > What should be done about this optimization for 4.4 and 4.5? Is there > > anyone trying to fix its shortcomings? > > > > Thanks in advance, > > I will happily approve a patch to make -frtl-abstract-sequences a > no-op and remove > its implementation.
I've put Gabor Loki in the loop since the last emails from him on this optimization in April 2008 seem to suggest he was working on bugs. Sincerely, Laurent
