--- /dev/null
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt -dse -S %s | FileCheck %s
+
+declare void @use(i32)
+
+; Out-of-bounds stores can be considered killing any other stores to the same
+; object in the same BB, because they are UB and guaranteed to execute. Note
+; that cases in which the BB is exited through unwinding are handled separately
+; by DSE and the unwinding call will be considered as clobber.
+define i32 @test_out_of_bounds_store_local(i1 %c) {
+; CHECK-LABEL: @test_out_of_bounds_store_local(
+; CHECK-NEXT: [[D:%.*]] = alloca [1 x i32], align 4
+; CHECK-NEXT: [[ARRAYIDX1:%.*]] = getelementptr inbounds [1 x i32], [1 x i32]* [[D]], i64 0, i64 0
+; CHECK-NEXT: [[LV1:%.*]] = load i32, i32* [[ARRAYIDX1]], align 4
+; CHECK-NEXT: call void @use(i32 [[LV1]])
+; CHECK-NEXT: ret i32 0
+;
+ %d = alloca [1 x i32], align 4
+ %arrayidx = getelementptr inbounds [1 x i32], [1 x i32]* %d, i64 0, i64 0
+ store i32 10, i32* %arrayidx, align 4
+ %arrayidx.1 = getelementptr inbounds [1 x i32], [1 x i32]* %d, i64 0, i64 1
+ store i32 20, i32* %arrayidx.1, align 4
+ %arrayidx1 = getelementptr inbounds [1 x i32], [1 x i32]* %d, i64 0, i64 0
+ %lv1 = load i32, i32* %arrayidx1, align 4
+ call void @use(i32 %lv1)
+ ret i32 0
+}
+
+; Make sure that out-of-bound stores are not considered killing other stores to
+; the same underlying object, if they are in different basic blocks. The
+; out-of-bounds store may not be executed.
+;
+; Test case from PR48279. FIXME.
+define i32 @test_out_of_bounds_store_nonlocal(i1 %c) {
+; CHECK-LABEL: @test_out_of_bounds_store_nonlocal(
+; CHECK-NEXT: [[D:%.*]] = alloca [1 x i32], align 4
+; CHECK-NEXT: br label [[FOR_BODY:%.*]]
+; CHECK: for.body:
+; CHECK-NEXT: br label [[FOR_INC:%.*]]
+; CHECK: for.inc:
+; CHECK-NEXT: br i1 [[C:%.*]], label [[FOR_BODY_1:%.*]], label [[FOR_END:%.*]]
+; CHECK: for.body.1:
+; CHECK-NEXT: ret i32 1
+; CHECK: for.end:
+; CHECK-NEXT: [[ARRAYIDX1:%.*]] = getelementptr inbounds [1 x i32], [1 x i32]* [[D]], i64 0, i64 0
+; CHECK-NEXT: [[LV1:%.*]] = load i32, i32* [[ARRAYIDX1]], align 4
+; CHECK-NEXT: call void @use(i32 [[LV1]])
+; CHECK-NEXT: ret i32 0
+;
+ %d = alloca [1 x i32], align 4
+ br label %for.body
+
+for.body: ; preds = %for.cond
+ %arrayidx = getelementptr inbounds [1 x i32], [1 x i32]* %d, i64 0, i64 0
+ store i32 10, i32* %arrayidx, align 4
+ br label %for.inc
+
+for.inc: ; preds = %for.body
+ br i1 %c, label %for.body.1, label %for.end
+
+for.body.1: ; preds = %for.inc
+ %arrayidx.1 = getelementptr inbounds [1 x i32], [1 x i32]* %d, i64 0, i64 1
+ store i32 20, i32* %arrayidx.1, align 4
+ ret i32 1
+
+for.end: ; preds = %for.inc
+ %arrayidx1 = getelementptr inbounds [1 x i32], [1 x i32]* %d, i64 0, i64 0
+ %lv1 = load i32, i32* %arrayidx1, align 4
+ call void @use(i32 %lv1)
+ ret i32 0
+}