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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/61446] [4.10 Regression]: ICE in copyprop_hardreg_forward_1, at regcprop.c with -O2 -m32 -march=corei7
Date: Sun, 08 Jun 2014 10:57:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61446

Dominique d'Humieres <dominiq at lps dot ens.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2014-06-08
     Ever confirmed|0                           |1

--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
This breaks bootstrap on x86_64-apple-darwin13 and other targets (see
https://gcc.gnu.org/ml/gcc-regression/2014-06/). On darwin the failure is

/opt/gcc/build_w/./gcc/xgcc -B/opt/gcc/build_w/./gcc/
-B/opt/gcc/gcc4.10w/x86_64-apple-darwin13.2.0/bin/
-B/opt/gcc/gcc4.10w/x86_64-apple-darwin13.2.0/lib/ -isystem
/opt/gcc/gcc4.10w/x86_64-apple-darwin13.2.0/include -isystem
/opt/gcc/gcc4.10w/x86_64-apple-darwin13.2.0/sys-include    -g -O2 -O2  -g -O2
-DIN_GCC    -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wno-format
-Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition  -isystem
./include   -pipe -fno-common -g -DIN_LIBGCC2 -fbuilding-libgcc
-fno-stack-protector   -pipe -fno-common -I. -I. -I../.././gcc
-I../../../work/libgcc -I../../../work/libgcc/. -I../../../work/libgcc/../gcc
-I../../../work/libgcc/../include  -DHAVE_CC_TLS -DUSE_EMUTLS -o
_fixunssfti_s.o -MT _fixunssfti_s.o -MD -MP -MF _fixunssfti_s.dep -DSHARED
-DL_fixunsdfdi -c ../../../work/libgcc/libgcc2.c \
        -DLIBGCC2_UNITS_PER_WORD=8
../../../../work/libgcc/libgcc2.c: In function '__fixunssfdi':
../../../../work/libgcc/libgcc2.c:1492:1: error: insn does not satisfy its
constraints:
 }
 ^
(insn 60 13 14 2 (set (reg:DI 0 ax)
        (reg:DI 21 xmm0)) ../../../../work/libgcc/libgcc2.c:1444 89
{*movdi_internal}
     (expr_list:REG_UNUSED (reg:DI 0 ax)
        (nil)))
../../../../work/libgcc/libgcc2.c:1492:1: internal compiler error: in
copyprop_hardreg_forward_1, at regcprop.c:776

Reverting r211321 allowed me to bootstrap r211353 on x86_64-apple-darwin13.