[llvm] [VPlan] Set correct VPIRFlags for FP selects when sinking stores. (PR #212973)

[Luke Lau via llvm-commits]

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@@ -2526,6 +2526,13 @@ VPIRFlags VPIRFlags::getDefaultFlags(unsigned Opcode) {
   case Instruction::FPExt:
   case Instruction::FPTrunc:
     return FastMathFlags();
+  case Instruction::Select:
+  case Instruction::PHI:
+  case Instruction::Call:
+    // Selects only have fast-math flags if they produce a floating-point value.
+    if (ResultTy && FPMathOperator::isSupportedFloatingPointType(ResultTy))
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lukel97 wrote:

Is the plan to eventually assert if Select/PHI/Call don't pass `ResultTy`?

https://github.com/llvm/llvm-project/pull/212973