On Thu, Aug 25, 2011 at 8:00 PM, Richard Henderson <r...@redhat.com> wrote: >> @@ -3445,7 +3463,7 @@ >> }) >> >> (define_insn "*zero_extendsidi2_rex64" >> - [(set (match_operand:DI 0 "nonimmediate_operand" >> "=r,o,?*Ym,?*y,?*Yi,*Y2") >> + [(set (match_operand:DI 0 "nonimmediate_operand" "=r,o,?*Ym,?*y,?*Yi,*x") >> (zero_extend:DI >> (match_operand:SI 1 "nonimmediate_operand" "rm,0,r ,m ,r ,m")))] >> "TARGET_64BIT" >> @@ -3470,7 +3488,7 @@ > > Missing ISA attr? Although perhaps it doesn't matter; this is 64-bit, and > if -mno-sse we disable the register bank. > > Other than this I didn't see any errors.
No, this was done on purpose. We assume that SSE2 (so, Y2) is always enabled on x86_64 target. -mno-sse is handled in ix86_conditional_register_usage by marking all SSE regs fixed. Please note that all *_rex64 patterns were changed in the same way, as described in the ChangeLog entry. Uros.
