[clang] [llvm] [SPIRV] `getMBB()` isn't always safe to call (PR #236948)

[Marcos Maronas via cfe-commits]

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@@ -266,7 +266,8 @@ const MachineInstr 
*SPIRVGlobalRegistry::createConstOrTypeAtFunctionEntry(
     MachineIRBuilder &MIRBuilder,
     std::function<MachineInstr *(MachineIRBuilder &)> Op) {
   auto oldInsertPoint = MIRBuilder.getInsertPt();
-  MachineBasicBlock *OldMBB = &MIRBuilder.getMBB();
+  MachineBasicBlock *OldMBB =
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maarquitos14 wrote:

That works for me.

https://github.com/llvm/llvm-project/pull/236948
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