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SLPVectorizer: Only vectorize intrinsics whose operands are widened equally

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The vectorizer only knows how to vectorize intrinics by widening all operands by
the same factor.

Patch by Tyler Nowicki!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205855 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Arnold Schwaighofer
2014-04-09 14:20:47 +00:00
parent 0d5d656524
commit b0ee2374ce
4 changed files with 100 additions and 26 deletions
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5
lib/Transforms/Vectorize/SLPVectorizer.cpp
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@ -41,6 +41,7 @@
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Transforms/Utils/VectorUtils.h"
#include <algorithm>
#include <map>
@ -949,7 +950,9 @@ void BoUpSLP::buildTree_rec(ArrayRef<Value *> VL, unsigned Depth) {
case Instruction::Call: {
// Check if the calls are all to the same vectorizable intrinsic.
IntrinsicInst *II = dyn_cast<IntrinsicInst>(VL[0]);
if (II==NULL) {
Intrinsic::ID ID = II ? II->getIntrinsicID() : Intrinsic::not_intrinsic;
if (!isTriviallyVectorizable(ID)) {
newTreeEntry(VL, false);
DEBUG(dbgs() << "SLP: Non-vectorizable call.\n");
return;