[test][DSE] Precommit test for D123162

diff --git a/llvm/test/Transforms/DeadStoreElimination/assume.ll b/llvm/test/Transforms/DeadStoreElimination/assume.ll
new file mode 100644 (file)
index 0000000..f7559dc
--- /dev/null
+++ b/llvm/test/Transforms/DeadStoreElimination/assume.ll
@@ -0,0 +1,23 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt -passes=dse -S < %s | FileCheck %s
+
+@global = external constant i8
+
+define void @f() {
+; CHECK-LABEL: @f(
+; CHECK-NEXT:    [[TMP1:%.*]] = call noalias i8* @_Znwm(i64 32)
+; CHECK-NEXT:    [[TMP2:%.*]] = icmp ugt i8* [[TMP1]], @global
+; CHECK-NEXT:    call void @llvm.assume(i1 [[TMP2]])
+; CHECK-NEXT:    store i8 0, i8* [[TMP1]], align 1
+; CHECK-NEXT:    ret void
+;
+  %tmp1 = call noalias i8* @_Znwm(i64 32)
+  %tmp2 = icmp ugt i8* %tmp1, @global
+  call void @llvm.assume(i1 %tmp2)
+  store i8 0, i8* %tmp1, align 1
+  ret void
+}
+
+declare i8* @_Znwm(i64)
+
+declare void @llvm.assume(i1)