[llvm] fc7af12 - [AMDGPU] Pre-commit test for D116469. NFC

[Craig Topper via llvm-commits]

Author: Craig Topper
Date: 2022-01-14T08:54:38-08:00
New Revision: fc7af123ddba48e53ae49af4352cb71f2a27cf89

URL: https://github.com/llvm/llvm-project/commit/fc7af123ddba48e53ae49af4352cb71f2a27cf89
DIFF: https://github.com/llvm/llvm-project/commit/fc7af123ddba48e53ae49af4352cb71f2a27cf89.diff

LOG: [AMDGPU] Pre-commit test for D116469. NFC

The multiply in this test is miscompiled to 0.

Reviewed By: foad

Differential Revision: https://reviews.llvm.org/D117280

Added: 
    

Modified: 
    llvm/test/CodeGen/AMDGPU/amdgpu-mul24-knownbits.ll

Removed: 
    


################################################################################
diff  --git a/llvm/test/CodeGen/AMDGPU/amdgpu-mul24-knownbits.ll b/llvm/test/CodeGen/AMDGPU/amdgpu-mul24-knownbits.ll
index c7b7fc4835cc5..ce5d952408dd1 100644
--- a/llvm/test/CodeGen/AMDGPU/amdgpu-mul24-knownbits.ll
+++ b/llvm/test/CodeGen/AMDGPU/amdgpu-mul24-knownbits.ll
@@ -29,6 +29,19 @@ entry:
   ret void
 }
 
+define i32 @f(i32 %x, i32 %y) {
+; GCN-LABEL: f:
+; GCN:       ; %bb.0:
+; GCN-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GCN-NEXT:    v_mov_b32_e32 v0, 0
+; GCN-NEXT:    s_setpc_b64 s[30:31]
+  %xx = or i32 %x, -128 ; 0xffffff80
+  %yy = or i32 %y, -128 ; 0xffffff80
+  %r = mul i32 %xx, %yy
+  %rr = lshr i32 %r, 14
+  ret i32 %rr
+}
+
 ; Function Attrs: nounwind readnone speculatable
 declare i32 @llvm.amdgcn.workitem.id.x() #20