https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120427
Harald van Dijk <harald at gigawatt dot nl> changed:
What |Removed |Added
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CC| |harald at gigawatt dot nl
--- Comment #9 from Harald van Dijk <harald at gigawatt dot nl> ---
(In reply to H.J. Lu from comment #2)
> We shouldn't transform "mov $-1,reg" to "push $-1; pop reg".
> We should transform "mov $-1,reg" to "or $-1,reg" instead.
Is that really an improvement? For 32-bit registers, sure, it's fine, but for
64-bit registers this increases code size, does it not? orq $-1, %rax is four
bytes, when pushq $-1; popq %rax is only three.
