1 files changed, 34 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/readnone-maythrow.ll b/test/Transforms/InstCombine/readnone-maythrow.ll
new file mode 100644
index 0000000000000..f01e90263a303
--- /dev/null
+++ b/test/Transforms/InstCombine/readnone-maythrow.ll
@@ -0,0 +1,34 @@
+; RUN: opt -S -instcombine < %s | FileCheck %s
+
+declare void @readnone_but_may_throw() readnone
+
+define void @f_0(i32* %ptr) {
+; CHECK-LABEL: @f_0(
+entry:
+; CHECK:  store i32 10, i32* %ptr
+; CHECK-NEXT:  call void @readnone_but_may_throw()
+; CHECK-NEXT:  store i32 20, i32* %ptr, align 4
+; CHECK:  ret void
+
+  store i32 10, i32* %ptr
+  call void @readnone_but_may_throw()
+  store i32 20, i32* %ptr
+  ret void
+}
+
+define void @f_1(i1 %cond, i32* %ptr) {
+; CHECK-LABEL: @f_1(
+; CHECK:  store i32 10, i32* %ptr
+; CHECK-NEXT:  call void @readnone_but_may_throw()
+
+  store i32 10, i32* %ptr
+  call void @readnone_but_may_throw()
+  br i1 %cond, label %left, label %merge
+
+left:
+  store i32 20, i32* %ptr
+  br label %merge
+
+merge:
+  ret void
+}