Messages in this thread | | | From | Segher Boessenkool <> | Subject | Re: kernel + gcc 4.1 = several problems | Date | Sun, 7 Jan 2007 16:10:53 +0100 |
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> I want this: > > char v[4]; > ... > memcmp(v, "abcd", 4) == 0 > > compile to single cmpl on i386. This (gcc 4.1.1) is ridiculous:
> call memcmp
i686-linux-gcc (GCC) 4.2.0 20060410 (experimental)
movl $4, %ecx #, tmp65 cld movl $v, %esi #, tmp63 movl $.LC0, %edi #, tmp64 repz cmpsb sete %al #, tmp68
Still not perfect, but better already. If you have any specific examples that you'd like to have compiled to better code, please report them in GCC bugzilla (with a self-contained testcase, please).
Segher
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