1 files changed, 79 insertions, 0 deletions
diff --git a/llvm/test/Transforms/WholeProgramDevirt/constant-arg.ll b/llvm/test/Transforms/WholeProgramDevirt/constant-arg.ll
new file mode 100644
index 00000000000..ea72d16930a
--- /dev/null
+++ b/llvm/test/Transforms/WholeProgramDevirt/constant-arg.ll
@@ -0,0 +1,79 @@
+; RUN: opt -S -wholeprogramdevirt %s | FileCheck %s
+
+target datalayout = "e-p:64:64"
+target triple = "x86_64-unknown-linux-gnu"
+
+; CHECK: private constant { [8 x i8], [1 x i8*], [0 x i8] } { [8 x i8] c"\00\00\00\00\00\00\00\01", [1 x i8*] [i8* bitcast (i1 (i8*, i32)* @vf1 to i8*)], [0 x i8] zeroinitializer }
+; CHECK: private constant { [8 x i8], [1 x i8*], [0 x i8] } { [8 x i8] c"\00\00\00\00\00\00\00\02", [1 x i8*] [i8* bitcast (i1 (i8*, i32)* @vf2 to i8*)], [0 x i8] zeroinitializer }
+; CHECK: private constant { [8 x i8], [1 x i8*], [0 x i8] } { [8 x i8] c"\00\00\00\00\00\00\00\01", [1 x i8*] [i8* bitcast (i1 (i8*, i32)* @vf4 to i8*)], [0 x i8] zeroinitializer }
+; CHECK: private constant { [8 x i8], [1 x i8*], [0 x i8] } { [8 x i8] c"\00\00\00\00\00\00\00\02", [1 x i8*] [i8* bitcast (i1 (i8*, i32)* @vf8 to i8*)], [0 x i8] zeroinitializer }
+
+@vt1 = constant [1 x i8*] [i8* bitcast (i1 (i8*, i32)* @vf1 to i8*)]
+@vt2 = constant [1 x i8*] [i8* bitcast (i1 (i8*, i32)* @vf2 to i8*)]
+@vt4 = constant [1 x i8*] [i8* bitcast (i1 (i8*, i32)* @vf4 to i8*)]
+@vt8 = constant [1 x i8*] [i8* bitcast (i1 (i8*, i32)* @vf8 to i8*)]
+
+define i1 @vf1(i8* %this, i32 %arg) readnone {
+  %and = and i32 %arg, 1
+  %cmp = icmp ne i32 %and, 0
+  ret i1 %cmp
+}
+
+define i1 @vf2(i8* %this, i32 %arg) readnone {
+  %and = and i32 %arg, 2
+  %cmp = icmp ne i32 %and, 0
+  ret i1 %cmp
+}
+
+define i1 @vf4(i8* %this, i32 %arg) readnone {
+  %and = and i32 %arg, 4
+  %cmp = icmp ne i32 %and, 0
+  ret i1 %cmp
+}
+
+define i1 @vf8(i8* %this, i32 %arg) readnone {
+  %and = and i32 %arg, 8
+  %cmp = icmp ne i32 %and, 0
+  ret i1 %cmp
+}
+
+; 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
+  %vtablei8 = bitcast [1 x i8*]* %vtable to i8*
+  %p = call i1 @llvm.bitset.test(i8* %vtablei8, metadata !"bitset")
+  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*, i32)*
+  ; CHECK: getelementptr {{.*}} -1
+  ; CHECK: and {{.*}}, 1
+  %result = call i1 %fptr_casted(i8* %obj, i32 5)
+  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
+  %vtablei8 = bitcast [1 x i8*]* %vtable to i8*
+  %p = call i1 @llvm.bitset.test(i8* %vtablei8, metadata !"bitset")
+  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*, i32)*
+  ; CHECK: getelementptr {{.*}} -1
+  ; CHECK: and {{.*}}, 2
+  %result = call i1 %fptr_casted(i8* %obj, i32 10)
+  ret i1 %result
+}
+
+declare i1 @llvm.bitset.test(i8*, metadata)
+declare void @llvm.assume(i1)
+
+!0 = !{!"bitset", [1 x i8*]* @vt1, i32 0}
+!1 = !{!"bitset", [1 x i8*]* @vt2, i32 0}
+!2 = !{!"bitset", [1 x i8*]* @vt4, i32 0}
+!3 = !{!"bitset", [1 x i8*]* @vt8, i32 0}
+!llvm.bitsets = !{!0, !1, !2, !3}