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Allow targets to prefer TypeSplitVector over TypePromoteInteger when computing the legalization method for vectors

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For some targets, it is desirable to prefer scalarizing <N x i1> instead of promoting to a larger legal type, such as <N x i32>.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168882 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Justin Holewinski
2012-11-29 14:26:24 +00:00
parent 84af05e1ba
commit 3d200255d5
5 changed files with 32 additions and 1 deletions
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2
lib/CodeGen/SelectionDAG/TargetLowering.cpp
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@@ -825,7 +825,7 @@ void TargetLowering::computeRegisterProperties() {
// that wider vector type.
EVT EltVT = VT.getVectorElementType();
unsigned NElts = VT.getVectorNumElements();
if (NElts != 1) {
if (NElts != 1 && !shouldSplitVectorElementType(EltVT)) {
bool IsLegalWiderType = false;
// First try to promote the elements of integer vectors. If no legal
// promotion was found, fallback to the widen-vector method.