[llvm] Fix SIFixSGPRCopies To Handle Physical Registers (PR #149859)

[Patrick Simmons via llvm-commits]

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@@ -898,12 +898,13 @@ bool SIFixSGPRCopies::lowerSpecialCase(MachineInstr &MI,
               TII->get(AMDGPU::V_READFIRSTLANE_B32), TmpReg)
           .add(MI.getOperand(1));
       MI.getOperand(1).setReg(TmpReg);
+      return true;
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linuxrocks123 wrote:

I'm not sure I understand.

https://github.com/llvm/llvm-project/pull/149859