[Bug c/82940] Suboptimal code for (a & 0x7f) | (b & 0x80) on powerpc

2017-11-17 Thread segher at gcc dot gnu.org
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82940 --- Comment #3 from Segher Boessenkool --- In combine, we start with insn_cost 4 for10: r137:SI=r136:QI#0&0x7f REG_DEAD r136:QI insn_cost 4 for13: r140:SI=r132:SI&0xff80 REG_DEAD r132:SI insn_cost 4 for16: r1

[Bug c/82940] Suboptimal code for (a & 0x7f) | (b & 0x80) on powerpc

2017-11-17 Thread segher at gcc dot gnu.org
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82940 Segher Boessenkool changed: What|Removed |Added Target|powerpc |powerpc*-*-* Status|UNC

[Bug c/82940] Suboptimal code for (a & 0x7f) | (b & 0x80) on powerpc

2017-11-13 Thread rguenth at gcc dot gnu.org
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82940 Richard Biener changed: What|Removed |Added Keywords||missed-optimization Target|