1 files changed, 28 insertions, 0 deletions
diff --git a/llvm/test/Transforms/IPConstantProp/comdat-ipo.ll b/llvm/test/Transforms/IPConstantProp/comdat-ipo.ll
new file mode 100644
index 00000000000..6c4c44c33e2
--- /dev/null
+++ b/llvm/test/Transforms/IPConstantProp/comdat-ipo.ll
@@ -0,0 +1,28 @@
+; RUN: opt < %s -ipconstprop -S | FileCheck %s
+
+; See PR26774
+
+define i32 @baz() {
+  ret i32 10
+}
+
+; We can const-prop @baz's return value *into* @foo, but cannot
+; constprop @foo's return value into bar.
+
+define linkonce_odr i32 @foo() {
+; CHECK-LABEL: @foo(
+; CHECK-NEXT:  %val = call i32 @baz()
+; CHECK-NEXT:  ret i32 10
+
+  %val = call i32 @baz()
+  ret i32 %val
+}
+
+define i32 @bar() {
+; CHECK-LABEL: @bar(
+; CHECK-NEXT:  %val = call i32 @foo()
+; CHECK-NEXT:  ret i32 %val
+
+  %val = call i32 @foo()
+  ret i32 %val
+}