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.