[llvm] [AMDGPU] Fixed llvm-debuginfo-analyzer for AMDGPU. (PR #145125)

[Adam Yang via llvm-commits]

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@@ -130,6 +130,11 @@ void SIPreAllocateWWMRegs::rewriteRegs(MachineFunction &MF) {
         if (VirtReg.isPhysical())
           continue;
 
+        if (!VirtReg.isValid()) {
+          assert(MI.isDebugInstr() && "non-debug use of noreg");
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adam-yang wrote:

Are there AMDGPU instructions that take noreg? I could see other targets failing verifier if the assert is run on all targets.

https://github.com/llvm/llvm-project/pull/145125