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[LoopUtils] Add an extra parameter OpValue to propagateIRFlags function,

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If OpValue is non-null, we only consider operations similar to OpValue
when intersecting.

Differential Revision: https://reviews.llvm.org/D35292

llvm-svn: 308428
This commit is contained in:
Dinar Temirbulatov 2017-07-19 10:02:07 +00:00
parent 8f00944dee
commit 956df253a6
2 changed files with 19 additions and 12 deletions
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4
include/llvm/Transforms/Utils/LoopUtils.h
View File

@ -531,8 +531,10 @@ Value *createTargetReduction(IRBuilder<> &B, const TargetTransformInfo *TTI,
/// Get the intersection (logical and) of all of the potential IR flags
/// of each scalar operation (VL) that will be converted into a vector (I).
/// If OpValue is non-null, we only consider operations similar to OpValue
/// when intersecting.
/// Flag set: NSW, NUW, exact, and all of fast-math.
void propagateIRFlags(Value *I, ArrayRef<Value *> VL);
void propagateIRFlags(Value *I, ArrayRef<Value *> VL, Value *OpValue = nullptr);
} // end namespace llvm

27
lib/Transforms/Utils/LoopUtils.cpp
View File

@ -1376,16 +1376,21 @@ Value *llvm::createTargetReduction(IRBuilder<> &Builder,
}
}
void llvm::propagateIRFlags(Value *I, ArrayRef<Value *> VL) {
if (auto *VecOp = dyn_cast<Instruction>(I)) {
if (auto *I0 = dyn_cast<Instruction>(VL[0])) {
// VecOVp is initialized to the 0th scalar, so start counting from index
// '1'.
VecOp->copyIRFlags(I0);
for (int i = 1, e = VL.size(); i < e; ++i) {
if (auto *Scalar = dyn_cast<Instruction>(VL[i]))
VecOp->andIRFlags(Scalar);
}
}
void llvm::propagateIRFlags(Value *I, ArrayRef<Value *> VL, Value *OpValue) {
auto *VecOp = dyn_cast<Instruction>(I);
if (!VecOp)
return;
auto *Intersection = (OpValue == nullptr) ? dyn_cast<Instruction>(VL[0])
: dyn_cast<Instruction>(OpValue);
if (!Intersection)
return;
const unsigned Opcode = Intersection->getOpcode();
VecOp->copyIRFlags(Intersection);
for (auto *V : VL) {
auto *Instr = dyn_cast<Instruction>(V);
if (!Instr)
continue;
if (OpValue == nullptr || Opcode == Instr->getOpcode())
VecOp->andIRFlags(V);
}
}