Refactor creation of overflow result tuples in InstCombineCalls.
Extract the creation of overflow result tuples in a separate function. NFC.
llvm-svn: 224006
diff --git a/llvm/lib/Transforms/InstCombine/InstCombine.h b/llvm/lib/Transforms/InstCombine/InstCombine.h
index 4ccda4d..755de87 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombine.h
+++ b/llvm/lib/Transforms/InstCombine/InstCombine.h
@@ -331,6 +331,20 @@
return &I;
}
+ /// Creates a result tuple for an overflow intrinsic \p II with a given
+ /// \p Result and a constant \p Overflow value. If \p ReUseName is true the
+ /// \p Result's name is taken from \p II.
+ Instruction *CreateOverflowTuple(IntrinsicInst *II, Value *Result,
+ bool Overflow, bool ReUseName = true) {
+ if (ReUseName)
+ Result->takeName(II);
+ Constant *V[] = { UndefValue::get(Result->getType()),
+ Overflow ? Builder->getTrue() : Builder->getFalse() };
+ StructType *ST = cast<StructType>(II->getType());
+ Constant *Struct = ConstantStruct::get(ST, V);
+ return InsertValueInst::Create(Struct, Result, 0);
+ }
+
// EraseInstFromFunction - When dealing with an instruction that has side
// effects or produces a void value, we can't rely on DCE to delete the
// instruction. Instead, visit methods should return the value returned by