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R600: Remove unnecessary part of computeKnownBitsForTargetNode

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Zero-width BFEs are combined away already, so there's no point in
handling them.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219868 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Matt Arsenault 2014-10-15 23:37:49 +00:00
parent bb402de0c9
commit 37e484b5ef
1 changed files with 0 additions and 5 deletions
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5
lib/Target/R600/AMDGPUISelLowering.cpp
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@ -2388,11 +2388,6 @@ void AMDGPUTargetLowering::computeKnownBitsForTargetNode(
unsigned BitWidth = 32;
uint32_t Width = CWidth->getZExtValue() & 0x1f;
if (Width == 0) {
KnownZero = APInt::getAllOnesValue(BitWidth);
KnownOne = APInt::getNullValue(BitWidth);
return;
}
// FIXME: This could do a lot more. If offset is 0, should be the same as
// sign_extend_inreg implementation, but that involves duplicating it.