1 files changed, 87 insertions, 0 deletions
diff --git a/llvm/test/Transforms/IPConstantProp/multiple_callbacks.ll b/llvm/test/Transforms/IPConstantProp/multiple_callbacks.ll
new file mode 100644
index 00000000000..3288b5b94de
--- /dev/null
+++ b/llvm/test/Transforms/IPConstantProp/multiple_callbacks.ll
@@ -0,0 +1,87 @@
+; RUN: opt -ipconstprop -S < %s | FileCheck %s
+;
+;
+;                            /---------------------------------------|
+;                            |                /----------------------|----|
+;                            |                |                /-----|    |
+;                            V                V                V     |    |
+;    void broker(int (*cb0)(int), int (*cb1)(int), int (*cb2)(int), int, int);
+;
+;    static int cb0(int zero) {
+;      return zero;
+;    }
+;    static int cb1(int unknown) {
+;      return unknown;
+;    }
+;    static int cb2(int unknown) {
+;      cb0(0);
+;      return unknown;
+;    }
+;    static int cb3(int unknown) {
+;      return unknown;
+;    }
+;    static int cb4(int unknown) {
+;      return unknown;
+;    }
+;
+;    void foo() {
+;      cb0(0);
+;      cb3(1);
+;      broker(cb0, cb1, cb0, 0, 1);
+;      broker(cb1, cb2, cb2, 0, 1);
+;      broker(cb3, cb2, cb3, 0, 1);
+;      broker(cb4, cb4, cb4, 0, 1);
+;    }
+;
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+
+define internal i32 @cb0(i32 %zero) {
+entry:
+; CHECK:      @cb0
+; CHECK-NEXT: entry
+; CHECK-NEXT: ret i32 0
+  ret i32 %zero
+}
+
+define internal i32 @cb1(i32 %unknown) {
+entry:
+; CHECK: ret i32 %unknown
+  ret i32 %unknown
+}
+
+define internal i32 @cb2(i32 %unknown) {
+entry:
+  %call = call i32 @cb0(i32 0)
+; CHECK: ret i32 %unknown
+  ret i32 %unknown
+}
+
+define internal i32 @cb3(i32 %unknown) {
+entry:
+; CHECK: ret i32 %unknown
+  ret i32 %unknown
+}
+
+define internal i32 @cb4(i32 %unknown) {
+entry:
+; CHECK: ret i32 %unknown
+  ret i32 %unknown
+}
+
+define void @foo() {
+entry:
+  %call = call i32 @cb0(i32 0)
+  %call1 = call i32 @cb3(i32 1)
+  call void @broker(i32 (i32)* nonnull @cb0, i32 (i32)* nonnull @cb1, i32 (i32)* nonnull @cb0, i32 0, i32 1)
+  call void @broker(i32 (i32)* nonnull @cb1, i32 (i32)* nonnull @cb2, i32 (i32)* nonnull @cb2, i32 0, i32 1)
+  call void @broker(i32 (i32)* nonnull @cb3, i32 (i32)* nonnull @cb2, i32 (i32)* nonnull @cb3, i32 0, i32 1)
+  call void @broker(i32 (i32)* nonnull @cb4, i32 (i32)* nonnull @cb4, i32 (i32)* nonnull @cb4, i32 0, i32 1)
+  ret void
+}
+
+declare !callback !3 void @broker(i32 (i32)*, i32 (i32)*, i32 (i32)*, i32, i32)
+
+!0 = !{i64 0, i64 3, i1 false}
+!1 = !{i64 1, i64 4, i1 false}
+!2 = !{i64 2, i64 3, i1 false}
+!3 = !{!0, !2, !1}