1 files changed, 56 insertions, 0 deletions
diff --git a/test/Transforms/WholeProgramDevirt/unique-retval.ll b/test/Transforms/WholeProgramDevirt/unique-retval.ll
new file mode 100644
index 0000000000000..50b938c43e4ad
--- /dev/null
+++ b/test/Transforms/WholeProgramDevirt/unique-retval.ll
@@ -0,0 +1,56 @@
+; RUN: opt -S -wholeprogramdevirt %s | FileCheck %s
+
+target datalayout = "e-p:64:64"
+target triple = "x86_64-unknown-linux-gnu"
+
+@vt1 = constant [1 x i8*] [i8* bitcast (i1 (i8*)* @vf0 to i8*)], !type !0
+@vt2 = constant [1 x i8*] [i8* bitcast (i1 (i8*)* @vf0 to i8*)], !type !0, !type !1
+@vt3 = constant [1 x i8*] [i8* bitcast (i1 (i8*)* @vf1 to i8*)], !type !0, !type !1
+@vt4 = constant [1 x i8*] [i8* bitcast (i1 (i8*)* @vf1 to i8*)], !type !1
+
+define i1 @vf0(i8* %this) readnone {
+  ret i1 0
+}
+
+define i1 @vf1(i8* %this) readnone {
+  ret i1 1
+}
+
+; CHECK: define i1 @call1
+define i1 @call1(i8* %obj) {
+  %vtableptr = bitcast i8* %obj to [1 x i8*]**
+  %vtable = load [1 x i8*]*, [1 x i8*]** %vtableptr
+  ; CHECK: [[VT1:%[^ ]*]] = bitcast [1 x i8*]* {{.*}} to i8*
+  %vtablei8 = bitcast [1 x i8*]* %vtable to i8*
+  %p = call i1 @llvm.type.test(i8* %vtablei8, metadata !"typeid1")
+  call void @llvm.assume(i1 %p)
+  %fptrptr = getelementptr [1 x i8*], [1 x i8*]* %vtable, i32 0, i32 0
+  %fptr = load i8*, i8** %fptrptr
+  %fptr_casted = bitcast i8* %fptr to i1 (i8*)*
+  ; CHECK: [[RES1:%[^ ]*]] = icmp eq i8* [[VT1]], bitcast ([1 x i8*]* @vt3 to i8*)
+  %result = call i1 %fptr_casted(i8* %obj)
+  ; CHECK: ret i1 [[RES1]]
+  ret i1 %result
+}
+
+; CHECK: define i1 @call2
+define i1 @call2(i8* %obj) {
+  %vtableptr = bitcast i8* %obj to [1 x i8*]**
+  %vtable = load [1 x i8*]*, [1 x i8*]** %vtableptr
+  ; CHECK: [[VT2:%[^ ]*]] = bitcast [1 x i8*]* {{.*}} to i8*
+  %vtablei8 = bitcast [1 x i8*]* %vtable to i8*
+  %p = call i1 @llvm.type.test(i8* %vtablei8, metadata !"typeid2")
+  call void @llvm.assume(i1 %p)
+  %fptrptr = getelementptr [1 x i8*], [1 x i8*]* %vtable, i32 0, i32 0
+  %fptr = load i8*, i8** %fptrptr
+  %fptr_casted = bitcast i8* %fptr to i1 (i8*)*
+  ; CHECK: [[RES1:%[^ ]*]] = icmp ne i8* [[VT1]], bitcast ([1 x i8*]* @vt2 to i8*)
+  %result = call i1 %fptr_casted(i8* %obj)
+  ret i1 %result
+}
+
+declare i1 @llvm.type.test(i8*, metadata)
+declare void @llvm.assume(i1)
+
+!0 = !{i32 0, !"typeid1"}
+!1 = !{i32 0, !"typeid2"}