1 files changed, 61 insertions, 0 deletions
diff --git a/llvm/test/Transforms/WholeProgramDevirt/unique-retval.ll b/llvm/test/Transforms/WholeProgramDevirt/unique-retval.ll
new file mode 100644
index 00000000000..41aa3e59e8a
--- /dev/null
+++ b/llvm/test/Transforms/WholeProgramDevirt/unique-retval.ll
@@ -0,0 +1,61 @@
+; 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*)]
+@vt2 = constant [1 x i8*] [i8* bitcast (i1 (i8*)* @vf0 to i8*)]
+@vt3 = constant [1 x i8*] [i8* bitcast (i1 (i8*)* @vf1 to i8*)]
+@vt4 = constant [1 x i8*] [i8* bitcast (i1 (i8*)* @vf1 to i8*)]
+
+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.bitset.test(i8* %vtablei8, metadata !"bitset1")
+  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.bitset.test(i8* %vtablei8, metadata !"bitset2")
+  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.bitset.test(i8*, metadata)
+declare void @llvm.assume(i1)
+
+!0 = !{!"bitset1", [1 x i8*]* @vt1, i32 0}
+!1 = !{!"bitset1", [1 x i8*]* @vt2, i32 0}
+!2 = !{!"bitset1", [1 x i8*]* @vt3, i32 0}
+!3 = !{!"bitset2", [1 x i8*]* @vt2, i32 0}
+!4 = !{!"bitset2", [1 x i8*]* @vt3, i32 0}
+!5 = !{!"bitset2", [1 x i8*]* @vt4, i32 0}
+!llvm.bitsets = !{!0, !1, !2, !3, !4, !5}