| commit | f7c33c816248142d83ac300532b2dcda2de66e4f | [log] [tgz] |
|---|---|---|
| author | Andrea Di Biagio <Andrea_DiBiagio@sn.scee.net> | Tue Dec 10 15:22:48 2013 +0000 |
| committer | Andrea Di Biagio <Andrea_DiBiagio@sn.scee.net> | Tue Dec 10 15:22:48 2013 +0000 |
| tree | 3bf07e2203f111bdf9fc5042597bdf6d34fc98a3 | |
| parent | 2f6d7b96e74b6482d99f65b93648470de342e1c6 [diff] |
Ensure that the backend no longer emits unnecessary vector insert instructions
immediately after SSE scalar fp instructions like addss or mulss.
Added patterns to select SSE scalar fp arithmetic instructions from a scalar
fp operation followed by a blend.
For example, given the following code:
__m128 foo(__m128 A, __m128 B) {
A[0] += B[0];
return A;
}
previously we generated:
addss %xmm0, %xmm1
movss %xmm1, %xmm0
now we generate:
addss %xmm1, %xmm0
llvm-svn: 196925