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Tweak comments to make it clear that these combines are for SSE scalar instructions. 

llvm-svn: 267360
This commit is contained in:
Simon Pilgrim 2016-04-24 19:31:56 +00:00
parent 4b5462f119
commit 4c564ad4dd
1 changed files with 5 additions and 4 deletions
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9
llvm/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp
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@ -1179,7 +1179,7 @@ Value *InstCombiner::SimplifyDemandedVectorElts(Value *V, APInt DemandedElts,
switch (II->getIntrinsicID()) {
default: break;
// Unary vector operations that work column-wise.
// Unary scalar-as-vector operations that work column-wise.
case Intrinsic::x86_sse_rcp_ss:
case Intrinsic::x86_sse_rsqrt_ss:
case Intrinsic::x86_sse_sqrt_ss:
@ -1193,11 +1193,12 @@ Value *InstCombiner::SimplifyDemandedVectorElts(Value *V, APInt DemandedElts,
// If lowest element of a scalar op isn't used then use Arg0.
if (DemandedElts.getLoBits(1) != 1)
return II->getArgOperand(0);
// TODO: If only low elt lower SQRT to FSQRT (with rounding/exceptions checks).
// TODO: If only low elt lower SQRT to FSQRT (with rounding/exceptions
// checks).
break;
// Binary vector operations that work column-wise. A dest element is a
// function of the corresponding input elements from the two inputs.
// Binary scalar-as-vector operations that work column-wise. A dest element
// is a function of the corresponding input elements from the two inputs.
case Intrinsic::x86_sse_add_ss:
case Intrinsic::x86_sse_sub_ss:
case Intrinsic::x86_sse_mul_ss: