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[X86] Simplify the code that calculates a scaled blend mask. We don't need a second loop.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@291996 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Craig Topper 2017-01-14 04:29:15 +00:00
parent 7c24b913f8
commit 1e76954dbb
1 changed files with 1 additions and 2 deletions
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3
lib/Target/X86/X86ISelLowering.cpp
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@ -8368,8 +8368,7 @@ static SDValue lowerVectorShuffleAsBlend(const SDLoc &DL, MVT VT, SDValue V1,
uint64_t ScaledMask = 0;
for (int i = 0; i != Size; ++i)
if (BlendMask & (1ull << i))
for (int j = 0; j != Scale; ++j)
ScaledMask |= 1ull << (i * Scale + j);
ScaledMask |= ((1ull << Scale) - 1) << (i * Scale);
return ScaledMask;
};