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1dea0dc279
and vectorizes it.
Test case :
float hadd(float* a) {
return (a[0] + a[1]) + (a[2] + a[3]);
}
AArch64 assembly before patch :
ldp s0, s1, [x0]
ldp s2, s3, [x0, #8]
fadd s0, s0, s1
fadd s1, s2, s3
fadd s0, s0, s1
ret
AArch64 assembly after patch :
ldp d0, d1, [x0]
fadd v0.2s, v0.2s, v1.2s
faddp s0, v0.2s
ret
Reviewed Link : http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20141208/248531.html
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224119 91177308-0d34-0410-b5e6-96231b3b80d8
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