[llvm] [VPlan] Separate out logic to manage IR flags to VPIRFlags (NFC). (PR #140621)

[Luke Lau via llvm-commits]

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@@ -1113,8 +1074,9 @@ class VPInstructionWithType : public VPInstruction {
 
   VPInstruction *clone() override {
     SmallVector<VPValue *, 2> Operands(operands());
-    auto *New = new VPInstructionWithType(
-        getOpcode(), Operands, getResultType(), getDebugLoc(), getName());
+    auto *New =
+        new VPInstructionWithType(getOpcode(), Operands, getResultType(), *this,
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lukel97 wrote:

I guess we previously forgot to copy over the FMFs? Is it possible to write a test case which shows this?

https://github.com/llvm/llvm-project/pull/140621