[llvm] [AMDGPU] SelDAG: fix lowering of undefined workitem intrinsics (PR #126058)

[Matt Arsenault via llvm-commits]

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@@ -0,0 +1,36 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
+; RUN: llc -mtriple=amdgcn -mcpu=gfx942 -O0 --global-isel=false -o - %s | FileCheck %s
+
+declare i32 @llvm.amdgcn.workitem.id.x() #0
+declare i32 @llvm.amdgcn.workitem.id.y() #0
+declare i32 @llvm.amdgcn.workitem.id.z() #0
+
+define amdgpu_ps i32 @test_workitem_id_x() #1 {
+; CHECK-LABEL: test_workitem_id_x:
+; CHECK:       ; %bb.0:
+; CHECK-NEXT:    s_mov_b32 s0, 0
+; CHECK-NEXT:    ; return to shader part epilog
+  %id = call i32 @llvm.amdgcn.workitem.id.x()
+  ret i32 %id
+}
+
+define amdgpu_ps i32 @test_workitem_id_y() #1 {
+; CHECK-LABEL: test_workitem_id_y:
+; CHECK:       ; %bb.0:
+; CHECK-NEXT:    s_mov_b32 s0, 0
+; CHECK-NEXT:    ; return to shader part epilog
+  %id = call i32 @llvm.amdgcn.workitem.id.y()
+  ret i32 %id
+}
+
+define amdgpu_ps i32 @test_workitem_id_z() #1 {
+; CHECK-LABEL: test_workitem_id_z:
+; CHECK:       ; %bb.0:
+; CHECK-NEXT:    s_mov_b32 s0, 0
+; CHECK-NEXT:    ; return to shader part epilog
+  %id = call i32 @llvm.amdgcn.workitem.id.z()
+  ret i32 %id
+}
+
+attributes #0 = { nounwind readnone }
+attributes #1 = { nounwind }
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arsenm wrote:

Attribute sets aren't up to date but you can judo drop them 

https://github.com/llvm/llvm-project/pull/126058