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[IR] Add the constructor of ShuffleVector for one-input-vector. 

One of the two inputs of the Shufflevector is often a placeholder.
Previously, there were cases where the placeholder was undef, and there were cases where it was poison.
I added these constructors to create a placeholder consistently.

Changing to use the newly added constructor will be written in a separate patch.

Reviewed By: spatel

Differential Revision: https://reviews.llvm.org/D110146
This commit is contained in:
hyeongyu kim 2021-09-21 21:48:04 +09:00
parent e9ea03c62c
commit 043733d677
2 changed files with 34 additions and 0 deletions
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8
llvm/include/llvm/IR/Instructions.h
View File

@ -2017,6 +2017,14 @@ protected:
ShuffleVectorInst *cloneImpl() const;
public:
ShuffleVectorInst(Value *V1, Value *Mask, const Twine &NameStr = "",
Instruction *InsertBefore = nullptr);
ShuffleVectorInst(Value *V1, Value *Mask, const Twine &NameStr,
BasicBlock *InsertAtEnd);
ShuffleVectorInst(Value *V1, ArrayRef<int> Mask, const Twine &NameStr = "",
Instruction *InsertBefore = nullptr);
ShuffleVectorInst(Value *V1, ArrayRef<int> Mask, const Twine &NameStr,
BasicBlock *InsertAtEnd);
ShuffleVectorInst(Value *V1, Value *V2, Value *Mask,
const Twine &NameStr = "",
Instruction *InsertBefor = nullptr);

26
llvm/lib/IR/Instructions.cpp
View File

@ -1907,6 +1907,32 @@ bool InsertElementInst::isValidOperands(const Value *Vec, const Value *Elt,
// ShuffleVectorInst Implementation
//===----------------------------------------------------------------------===//
static Value *createPlaceholderForShuffleVector(Value *V) {
assert(V && "Cannot create placeholder of nullptr V");
return PoisonValue::get(V->getType());
}
ShuffleVectorInst::ShuffleVectorInst(Value *V1, Value *Mask, const Twine &Name,
Instruction *InsertBefore)
: ShuffleVectorInst(V1, createPlaceholderForShuffleVector(V1), Mask, Name,
InsertBefore) {}
ShuffleVectorInst::ShuffleVectorInst(Value *V1, Value *Mask, const Twine &Name,
BasicBlock *InsertAtEnd)
: ShuffleVectorInst(V1, createPlaceholderForShuffleVector(V1), Mask, Name,
InsertAtEnd) {}
ShuffleVectorInst::ShuffleVectorInst(Value *V1, ArrayRef<int> Mask,
const Twine &Name,
Instruction *InsertBefore)
: ShuffleVectorInst(V1, createPlaceholderForShuffleVector(V1), Mask, Name,
InsertBefore) {}
ShuffleVectorInst::ShuffleVectorInst(Value *V1, ArrayRef<int> Mask,
const Twine &Name, BasicBlock *InsertAtEnd)
: ShuffleVectorInst(V1, createPlaceholderForShuffleVector(V1), Mask, Name,
InsertAtEnd) {}
ShuffleVectorInst::ShuffleVectorInst(Value *V1, Value *V2, Value *Mask,
const Twine &Name,
Instruction *InsertBefore)