[llvm] [MachineVerifier] Query TargetInstrInfo for PHI nodes. (PR #110507)

[Vyacheslav Levytskyy via llvm-commits]

Nathan =?utf-8?q?Gauër?= <brioche at google.com>,
Nathan =?utf-8?q?Gauër?= <brioche at google.com>
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In-Reply-To: <llvm.org/llvm/llvm-project/pull/110507 at github.com>


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@@ -267,3 +267,27 @@ bool SPIRVInstrInfo::expandPostRAPseudo(MachineInstr &MI) const {
   }
   return false;
 }
+
+// The SPIR-V backends can emit the OpPhi instruction.
+bool SPIRVInstrInfo::isPhiInstr(const MachineInstr &MI) const {
+  return TargetInstrInfo::isPhiInstr(MI) || MI.getOpcode() == SPIRV::OpPhi;
+}
+
+unsigned SPIRVInstrInfo::getNumPhiIncomingPair(const MachineInstr &MI) const {
+  // OpPhi has 2 operands before the [Value, Src] pairs.
+  if (MI.getOpcode() == SPIRV::OpPhi)
+    return (MI.getNumOperands() - 2) / 2;
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VyacheslavLevytskyy wrote:

`>> 1`?

https://github.com/llvm/llvm-project/pull/110507