[llvm] [GlobalISel] Fix crash in isConstantOrConstantSplatVectorFP for non-r… (PR #208657)

[Mateusz Chudyk via llvm-commits]

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@@ -1542,6 +1542,8 @@ llvm::isConstantOrConstantSplatVector(MachineInstr &MI,
 std::optional<APFloat>
 llvm::isConstantOrConstantSplatVectorFP(MachineInstr &MI,
                                         const MachineRegisterInfo &MRI) {
+  if (!MI.getOperand(0).isReg())
+    return std::nullopt;
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mateuszchudyk wrote:

I changed the API.

https://github.com/llvm/llvm-project/pull/208657