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[PowerPC] Clarify a comment in PPCTTI about vector loads 

This should say that we could do unaligned vector loads on the P7 using VSX
instructions, not that we should.

llvm-svn: 264683
This commit is contained in:
Hal Finkel 2016-03-28 22:39:35 +00:00
parent c9d546c291
commit 69ada2f514
1 changed files with 1 additions and 1 deletions
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llvm/lib/Target/PowerPC/PPCTargetTransformInfo.cpp
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@ -375,7 +375,7 @@ int PPCTTIImpl::getMemoryOpCost(unsigned Opcode, Type *Src, unsigned Alignment,
// If we can use the permutation-based load sequence, then this is also
// relatively cheap (not counting loop-invariant instructions): one load plus
// one permute (the last load in a series has extra cost, but we're
// neglecting that here). Note that on the P7, we should do unaligned loads
// neglecting that here). Note that on the P7, we could do unaligned loads
// for Altivec types using the VSX instructions, but that's more expensive
// than using the permutation-based load sequence. On the P8, that's no
// longer true.