https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99930
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |segher at gcc dot gnu.org
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Seems because of r93 being live:
insn_cost 8 for 9: r93:V4SF=[`*.LC0']
REG_EQUAL const_vector
insn_cost 4 for 10: {r91:SF=abs(r92:SF);use r93:V4SF;clobber flags:CC;}
REG_DEAD r92:SF
REG_UNUSED flags:CC
insn_cost 8 for 11: r95:V4SF=[`*.LC1']
REG_EQUAL const_vector
insn_cost 4 for 12: {r94:SF=-r91:SF;use r95:V4SF;clobber flags:CC;}
REG_DEAD r91:SF
REG_UNUSED flags:CC
insn_cost 4 for 13: flags:CCFP=cmp(r90:SF,r94:SF)
REG_DEAD r94:SF
insn_cost 12 for 14: pc={(flags:CCFP>0)?L35:pc}
REG_DEAD flags:CCFP
REG_BR_PROB 59055804
insn_cost 8 for 16: r97:SF=[r89:DI+0x4]
REG_DEAD r89:DI
insn_cost 4 for 18: {r96:SF=abs(r97:SF);use r93:V4SF;clobber flags:CC;}
REG_DEAD r97:SF
REG_DEAD r93:V4SF
REG_UNUSED flags:CC
insn_cost 4 for 20: {r99:SF=-r96:SF;use r95:V4SF;clobber flags:CC;}
REG_DEAD r96:SF
REG_DEAD r95:V4SF
REG_UNUSED flags:CC
while at -O1 we have two loads of LC0 and r93 is dead after insn 10.
