[llvm] [AMDGPU] Handle llvm.amdgcn.pops.exiting.wave.id with calls (PR #98614)

[Matt Arsenault via llvm-commits]

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@@ -290,14 +290,12 @@ AMDGPUResourceUsageAnalysis::analyzeResourceUsage(
         case AMDGPU::SRC_PRIVATE_BASE:
         case AMDGPU::SRC_PRIVATE_LIMIT_LO:
         case AMDGPU::SRC_PRIVATE_LIMIT:
+        case AMDGPU::SRC_POPS_EXITING_WAVE_ID:
         case AMDGPU::SGPR_NULL:
         case AMDGPU::SGPR_NULL64:
         case AMDGPU::MODE:
           continue;
 
-        case AMDGPU::SRC_POPS_EXITING_WAVE_ID:
-          llvm_unreachable("src_pops_exiting_wave_id should not be used");
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arsenm wrote:

Don't understand what this was doing here before 

https://github.com/llvm/llvm-project/pull/98614