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[SLPVectorizer] Add isOdd() helper function, NFCI.

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llvm-svn: 306887
This commit is contained in:
Dinar Temirbulatov 2017-06-30 21:16:26 +00:00
parent e4945cb211
commit 885eda0f81
1 changed files with 7 additions and 2 deletions
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9
lib/Transforms/Vectorize/SLPVectorizer.cpp
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@ -173,6 +173,11 @@ static unsigned getAltOpcode(unsigned Op) {
}
}
/// true if the \p Value is odd, false otherwise.
static bool isOdd(unsigned Value) {
return Value & 1;
}
///\returns bool representing if Opcode \p Op can be part
/// of an alternate sequence which can later be merged as
/// a ShuffleVector instruction.
@ -190,7 +195,7 @@ static unsigned isAltInst(ArrayRef<Value *> VL) {
unsigned AltOpcode = getAltOpcode(Opcode);
for (int i = 1, e = VL.size(); i < e; i++) {
Instruction *I = dyn_cast<Instruction>(VL[i]);
if (!I || I->getOpcode() != ((i & 1) ? AltOpcode : Opcode))
if (!I || I->getOpcode() != (isOdd(i) ? AltOpcode : Opcode))
return 0;
}
return Instruction::ShuffleVector;
@ -2820,7 +2825,7 @@ Value *BoUpSLP::vectorizeTree(TreeEntry *E) {
unsigned e = E->Scalars.size();
SmallVector<Constant *, 8> Mask(e);
for (unsigned i = 0; i < e; ++i) {
if (i & 1) {
if (isOdd(i)) {
Mask[i] = Builder.getInt32(e + i);
OddScalars.push_back(E->Scalars[i]);
} else {