[llvm] [VectorCombine] Pass flags during IR creation (PR #193271)

[Matt Arsenault via llvm-commits]

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@@ -1293,6 +1299,83 @@ bool VectorCombine::scalarizeVPIntrinsic(Instruction &I) {
   return true;
 }
 
+Value *VectorCombine::createUnaryOp(Instruction::UnaryOps Opcode,
+                                    Value *Operand, UnaryOperator *OldI) {
+  switch (Opcode) {
+  case Instruction::FNeg:
+    return Builder.CreateFNegFMF(Operand, OldI,
+                                 OldI->getName() + ".scalar.fneg");
+  case Instruction::UnaryOpsEnd:
+    llvm_unreachable("Invalid unary opcode");
+  }
+  llvm_unreachable("Invalid unary opcode");
+}
+
+Value *VectorCombine::createBinaryOp(Instruction::BinaryOps Opcode, Value *LHS,
+                                     Value *RHS, BinaryOperator *OldI) {
+  Twine Prefix = OldI->getName() + ".scalar.";
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arsenm wrote:

Shouldn't have a Twine stored like this. This will fail a sanitizer build when the temporary string is destroyed 

https://github.com/llvm/llvm-project/pull/193271