[llvm] AMDGPU/SILowerI1Copies process phi incomings in specific order (PR #72124)

[Jay Foad via llvm-commits]

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@@ -581,10 +587,24 @@ bool SILowerI1Copies::lowerPhis() {
         assert(IncomingDef->isPHI() || PhiRegisters.count(IncomingReg));
       }
 
-      IncomingBlocks.push_back(IncomingMBB);
-      IncomingRegs.push_back(IncomingReg);
+      Incomings.push_back({IncomingReg, IncomingMBB, Register{}});
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jayfoad wrote:

Maybe emplace_back instead?

https://github.com/llvm/llvm-project/pull/72124