[llvm] 2cf632a - [ConstraintElimination] UB reproducer for D145677

[Vitaly Buka via llvm-commits]

Author: Vitaly Buka
Date: 2023-03-10T10:25:21-08:00
New Revision: 2cf632a3f39a0df553d157e881d1b8e4554adb47

URL: https://github.com/llvm/llvm-project/commit/2cf632a3f39a0df553d157e881d1b8e4554adb47
DIFF: https://github.com/llvm/llvm-project/commit/2cf632a3f39a0df553d157e881d1b8e4554adb47.diff

LOG: [ConstraintElimination] UB reproducer for D145677

Reviewed By: fhahn

Differential Revision: https://reviews.llvm.org/D145812

Added: 
    

Modified: 
    llvm/test/Transforms/ConstraintElimination/shl.ll

Removed: 
    


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diff  --git a/llvm/test/Transforms/ConstraintElimination/shl.ll b/llvm/test/Transforms/ConstraintElimination/shl.ll
index 5237a346f3d3..6d196f77da1c 100644
--- a/llvm/test/Transforms/ConstraintElimination/shl.ll
+++ b/llvm/test/Transforms/ConstraintElimination/shl.ll
@@ -1275,3 +1275,16 @@ entry:
   %shl.cmp = icmp uge i256 %shl.ub, 0
   ret i1 %shl.cmp
 }
+
+define i1 @shl_55() {
+; CHECK-LABEL: @shl_55(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[SHL_UB:%.*]] = shl nuw nsw i256 1, 55
+; CHECK-NEXT:    [[SHL_CMP:%.*]] = icmp uge i256 [[SHL_UB]], 1
+; CHECK-NEXT:    ret i1 true
+;
+entry:
+  %shl.ub = shl nuw nsw i256 1, 55
+  %shl.cmp = icmp uge i256 %shl.ub, 1
+  ret i1 %shl.cmp
+}