[llvm] 0d4d86c - [AMDGPU] Precommit test for D79481. NFC

[Carl Ritson via llvm-commits]

Author: Carl Ritson
Date: 2020-05-07T19:01:51+09:00
New Revision: 0d4d86cbd19603e8919701a3b58c5f1c002a9736

URL: https://github.com/llvm/llvm-project/commit/0d4d86cbd19603e8919701a3b58c5f1c002a9736
DIFF: https://github.com/llvm/llvm-project/commit/0d4d86cbd19603e8919701a3b58c5f1c002a9736.diff

LOG: [AMDGPU] Precommit test for D79481. NFC

Test shows unnecessary s_waitcnt between shader exports.

Added: 
    

Modified: 
    llvm/test/CodeGen/AMDGPU/llvm.amdgcn.exp.ll

Removed: 
    


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diff  --git a/llvm/test/CodeGen/AMDGPU/llvm.amdgcn.exp.ll b/llvm/test/CodeGen/AMDGPU/llvm.amdgcn.exp.ll
index cdfe9b460a01..1bbd209c21af 100644
--- a/llvm/test/CodeGen/AMDGPU/llvm.amdgcn.exp.ll
+++ b/llvm/test/CodeGen/AMDGPU/llvm.amdgcn.exp.ll
@@ -540,5 +540,23 @@ end:
   ret void
 }
 
+; GCN-LABEL: {{^}}test_export_clustering:
+; GCN-DAG: v_mov_b32_e32 [[W0:v[0-9]+]], 0
+; GCN-DAG: v_mov_b32_e32 [[X:v[0-9]+]], s0
+; GCN-DAG: v_mov_b32_e32 [[Y:v[0-9]+]], s1
+; GCN-DAG: v_add_f32_e32 [[Z0:v[0-9]+]]
+; GCN-DAG: exp param0 [[X]], [[Y]], [[Z0]], [[W0]]{{$}}
+; GCN-DAG: v_sub_f32_e32 [[Z1:v[0-9]+]]
+; GCN: s_waitcnt expcnt(0)
+; GCN: v_mov_b32_e32 [[W1:v[0-9]+]], 1.0
+; GCN: exp param1 [[X]], [[Y]], [[Z1]], [[W1]] done{{$}}
+define amdgpu_kernel void @test_export_clustering(float %x, float %y) #0 {
+  %z0 = fadd float %x, %y
+  call void @llvm.amdgcn.exp.f32(i32 32, i32 15, float %x, float %y, float %z0, float 0.0, i1 false, i1 false)
+  %z1 = fsub float %y, %x
+  call void @llvm.amdgcn.exp.f32(i32 33, i32 15, float %x, float %y, float %z1, float 1.0, i1 true, i1 false)
+  ret void
+}
+
 attributes #0 = { nounwind }
 attributes #1 = { nounwind inaccessiblememonly }