http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60525
--- Comment #4 from Markus Trippelsdorf <trippels at gcc dot gnu.org> --- (In reply to Richard Henderson from comment #3) > Created attachment 32350 [details] > proposed patch > > In the description for the patch in question, I mentioned how during > stage1 we could clean up all these patterns to rely on LRA. The fact > that this pr was filed immediately suggests that the current setup is > quite difficult to follow. > > Cleaning this up now instead of waiting for stage1 would seem to be > the way to make sure we get all the cases right. Your patch doesn't bootstrap: /var/tmp/gcc_build_dir/./gcc/xgcc -B/var/tmp/gcc_build_dir/./gcc/ -B/usr/x86_64-pc-linux-gnu/bin/ -B/usr/x86_64-pc-linux-gnu/lib/ -isystem /usr/x86_64-pc-linux-gnu/include -isystem /usr/x86_64-pc-linux-gnu/sys-include -march=native -O3 -pipe -O2 -march=native -O3 -pipe -DIN_GCC -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wno-format -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition -isystem ./include -fpic -mlong-double-80 -g -DIN_LIBGCC2 -fbuilding-libgcc -fno-stack-protector -fpic -mlong-double-80 -I. -I. -I../.././gcc -I../../../gcc/libgcc -I../../../gcc/libgcc/. -I../../../gcc/libgcc/../gcc -I../../../gcc/libgcc/../include -I../../../gcc/libgcc/config/libbid -DENABLE_DECIMAL_BID_FORMAT -DHAVE_CC_TLS -DUSE_TLS -o _fixunssfdi.o -MT _fixunssfdi.o -MD -MP -MF _fixunssfdi.dep -DL_fixunssfdi -c ../../../gcc/libgcc/libgcc2.c -fvisibility=hidden -DHIDE_EXPORTS ../../../gcc/libgcc/libgcc2.c: In function ‘__fixunssfti’: ../../../gcc/libgcc/libgcc2.c:1492:1: error: unrecognizable insn: } ^ (insn 103 102 36 7 (set (reg:V2DF 22 xmm1 [104]) (vec_merge:V4SF (vec_duplicate:V4SF (float:SF (mem/c:DI (plus:DI (reg/f:DI 7 sp) (const_int -16 [0xfffffffffffffff0])) [3 %sfp+-8 S8 A64]))) (reg:V2DF 22 xmm1 [104]) (const_int 1 [0x1]))) ../../../gcc/libgcc/libgcc2.c:1449 -1 (nil)) ../../../gcc/libgcc/libgcc2.c:1492:1: internal compiler error: in extract_insn, at recog.c:2241 Please submit a full bug report, with preprocessed source if appropriate