| commit | af723b9ae460aa42388ee15a79b68bb1c66e9775 | [log] [tgz] |
|---|---|---|
| author | Chris Lattner <sabre@nondot.org> | Fri Jan 25 05:46:26 2008 +0000 |
| committer | Chris Lattner <sabre@nondot.org> | Fri Jan 25 05:46:26 2008 +0000 |
| tree | eb62818a23874fa1e14d81bb28a098140e36a46e | |
| parent | 8eea3392984428930b287aecb160c2feda981a13 [diff] |
Add target-specific dag combines for FAND(x,0) and FOR(x,0). This allows
us to compile:
double test(double X) {
return copysign(0.0, X);
}
into:
_test:
andpd LCPI1_0(%rip), %xmm0
ret
instead of:
_test:
pxor %xmm1, %xmm1
andpd LCPI1_0(%rip), %xmm1
movapd %xmm0, %xmm2
andpd LCPI1_1(%rip), %xmm2
movapd %xmm1, %xmm0
orpd %xmm2, %xmm0
ret
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46344 91177308-0d34-0410-b5e6-96231b3b80d8