[llvm] SPIRV: Set NoPHIs property after selection (PR #136327)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-backend-spir-v

Author: Matt Arsenault (arsenm)

<details>
<summary>Changes</summary>

There should be no PHIs after selection, as OpPhi is used
instead. This hopefully avoids errors in #<!-- -->135277.

---
Full diff: https://github.com/llvm/llvm-project/pull/136327.diff


1 Files Affected:

- (modified) llvm/lib/Target/SPIRV/SPIRVTargetMachine.cpp (+6) 


``````````diff
diff --git a/llvm/lib/Target/SPIRV/SPIRVTargetMachine.cpp b/llvm/lib/Target/SPIRV/SPIRVTargetMachine.cpp
index 68286737b972f..f30578767a939 100644
--- a/llvm/lib/Target/SPIRV/SPIRVTargetMachine.cpp
+++ b/llvm/lib/Target/SPIRV/SPIRVTargetMachine.cpp
@@ -269,6 +269,12 @@ class SPIRVInstructionSelect : public InstructionSelect {
     return InstructionSelect::getRequiredProperties().reset(
         MachineFunctionProperties::Property::RegBankSelected);
   }
+
+  MachineFunctionProperties getClearedProperties() const override {
+    // No generic Phis remain, replaced with OpPhi
+    return InstructionSelect::getClearedProperties().reset(
+        MachineFunctionProperties::Property::NoPHIs);
+  }
 };
 } // namespace
 

``````````

</details>


https://github.com/llvm/llvm-project/pull/136327