1 files changed, 141 insertions, 0 deletions
diff --git a/test/Transforms/WholeProgramDevirt/virtual-const-prop-check.ll b/test/Transforms/WholeProgramDevirt/virtual-const-prop-check.ll
new file mode 100644
index 000000000000..d2eff163a840
--- /dev/null
+++ b/test/Transforms/WholeProgramDevirt/virtual-const-prop-check.ll
@@ -0,0 +1,141 @@
+; RUN: opt -S -wholeprogramdevirt -pass-remarks=wholeprogramdevirt %s 2>&1 | FileCheck %s
+
+target datalayout = "e-p:64:64"
+target triple = "x86_64-unknown-linux-gnu"
+
+; CHECK: remark: <unknown>:0:0: devirtualized call
+; CHECK: remark: <unknown>:0:0: devirtualized call
+; CHECK: remark: <unknown>:0:0: devirtualized call
+; CHECK-NOT: devirtualized call
+
+; CHECK: [[VT1DATA:@[^ ]*]] = private constant { [8 x i8], [3 x i8*], [0 x i8] } { [8 x i8] c"\00\00\00\01\01\00\00\00", [3 x i8*] [i8* bitcast (i1 (i8*)* @vf0i1 to i8*), i8* bitcast (i1 (i8*)* @vf1i1 to i8*), i8* bitcast (i32 (i8*)* @vf1i32 to i8*)], [0 x i8] zeroinitializer }, section "vt1sec", !type [[T8:![0-9]+]]
+@vt1 = constant [3 x i8*] [
+i8* bitcast (i1 (i8*)* @vf0i1 to i8*),
+i8* bitcast (i1 (i8*)* @vf1i1 to i8*),
+i8* bitcast (i32 (i8*)* @vf1i32 to i8*)
+], section "vt1sec", !type !0
+
+; CHECK: [[VT2DATA:@[^ ]*]] = private constant { [8 x i8], [3 x i8*], [0 x i8] } { [8 x i8] c"\00\00\00\02\02\00\00\00", [3 x i8*] [i8* bitcast (i1 (i8*)* @vf1i1 to i8*), i8* bitcast (i1 (i8*)* @vf0i1 to i8*), i8* bitcast (i32 (i8*)* @vf2i32 to i8*)], [0 x i8] zeroinitializer }, !type [[T8]]
+@vt2 = constant [3 x i8*] [
+i8* bitcast (i1 (i8*)* @vf1i1 to i8*),
+i8* bitcast (i1 (i8*)* @vf0i1 to i8*),
+i8* bitcast (i32 (i8*)* @vf2i32 to i8*)
+], !type !0
+
+; CHECK: [[VT3DATA:@[^ ]*]] = private constant { [8 x i8], [3 x i8*], [0 x i8] } { [8 x i8] c"\00\00\00\01\03\00\00\00", [3 x i8*] [i8* bitcast (i1 (i8*)* @vf0i1 to i8*), i8* bitcast (i1 (i8*)* @vf1i1 to i8*), i8* bitcast (i32 (i8*)* @vf3i32 to i8*)], [0 x i8] zeroinitializer }, !type [[T8]]
+@vt3 = constant [3 x i8*] [
+i8* bitcast (i1 (i8*)* @vf0i1 to i8*),
+i8* bitcast (i1 (i8*)* @vf1i1 to i8*),
+i8* bitcast (i32 (i8*)* @vf3i32 to i8*)
+], !type !0
+
+; CHECK: [[VT4DATA:@[^ ]*]] = private constant { [8 x i8], [3 x i8*], [0 x i8] } { [8 x i8] c"\00\00\00\02\04\00\00\00", [3 x i8*] [i8* bitcast (i1 (i8*)* @vf1i1 to i8*), i8* bitcast (i1 (i8*)* @vf0i1 to i8*), i8* bitcast (i32 (i8*)* @vf4i32 to i8*)], [0 x i8] zeroinitializer }, !type [[T8]]
+@vt4 = constant [3 x i8*] [
+i8* bitcast (i1 (i8*)* @vf1i1 to i8*),
+i8* bitcast (i1 (i8*)* @vf0i1 to i8*),
+i8* bitcast (i32 (i8*)* @vf4i32 to i8*)
+], !type !0
+
+; CHECK: @vt5 = {{.*}}, !type [[T0:![0-9]+]]
+@vt5 = constant [3 x i8*] [
+i8* bitcast (void ()* @__cxa_pure_virtual to i8*),
+i8* bitcast (void ()* @__cxa_pure_virtual to i8*),
+i8* bitcast (void ()* @__cxa_pure_virtual to i8*)
+], !type !0
+
+; CHECK: @vt1 = alias [3 x i8*], getelementptr inbounds ({ [8 x i8], [3 x i8*], [0 x i8] }, { [8 x i8], [3 x i8*], [0 x i8] }* [[VT1DATA]], i32 0, i32 1)
+; CHECK: @vt2 = alias [3 x i8*], getelementptr inbounds ({ [8 x i8], [3 x i8*], [0 x i8] }, { [8 x i8], [3 x i8*], [0 x i8] }* [[VT2DATA]], i32 0, i32 1)
+; CHECK: @vt3 = alias [3 x i8*], getelementptr inbounds ({ [8 x i8], [3 x i8*], [0 x i8] }, { [8 x i8], [3 x i8*], [0 x i8] }* [[VT3DATA]], i32 0, i32 1)
+; CHECK: @vt4 = alias [3 x i8*], getelementptr inbounds ({ [8 x i8], [3 x i8*], [0 x i8] }, { [8 x i8], [3 x i8*], [0 x i8] }* [[VT4DATA]], i32 0, i32 1)
+
+define i1 @vf0i1(i8* %this) readnone {
+  ret i1 0
+}
+
+define i1 @vf1i1(i8* %this) readnone {
+  ret i1 1
+}
+
+define i32 @vf1i32(i8* %this) readnone {
+  ret i32 1
+}
+
+define i32 @vf2i32(i8* %this) readnone {
+  ret i32 2
+}
+
+define i32 @vf3i32(i8* %this) readnone {
+  ret i32 3
+}
+
+define i32 @vf4i32(i8* %this) readnone {
+  ret i32 4
+}
+
+; CHECK: define i1 @call1(
+define i1 @call1(i8* %obj) {
+  %vtableptr = bitcast i8* %obj to [3 x i8*]**
+  %vtable = load [3 x i8*]*, [3 x i8*]** %vtableptr
+  ; CHECK: [[VT1:%[^ ]*]] = bitcast [3 x i8*]* {{.*}} to i8*
+  %vtablei8 = bitcast [3 x i8*]* %vtable to i8*
+  %pair = call {i8*, i1} @llvm.type.checked.load(i8* %vtablei8, i32 0, metadata !"typeid")
+  %fptr = extractvalue {i8*, i1} %pair, 0
+  %fptr_casted = bitcast i8* %fptr to i1 (i8*)*
+  ; CHECK: [[VTGEP1:%[^ ]*]] = getelementptr i8, i8* [[VT1]], i64 -5
+  ; CHECK: [[VTLOAD1:%[^ ]*]] = load i8, i8* [[VTGEP1]]
+  ; CHECK: [[VTAND1:%[^ ]*]] = and i8 [[VTLOAD1]], 2
+  ; CHECK: [[VTCMP1:%[^ ]*]] = icmp ne i8 [[VTAND1]], 0
+  %result = call i1 %fptr_casted(i8* %obj)
+  ; CHECK: [[AND1:%[^ ]*]] = and i1 [[VTCMP1]], true
+  %p = extractvalue {i8*, i1} %pair, 1
+  %and = and i1 %result, %p
+  ; CHECK: ret i1 [[AND1]]
+  ret i1 %and
+}
+
+; CHECK: define i1 @call2(
+define i1 @call2(i8* %obj) {
+  %vtableptr = bitcast i8* %obj to [3 x i8*]**
+  %vtable = load [3 x i8*]*, [3 x i8*]** %vtableptr
+  ; CHECK: [[VT2:%[^ ]*]] = bitcast [3 x i8*]* {{.*}} to i8*
+  %vtablei8 = bitcast [3 x i8*]* %vtable to i8*
+  %pair = call {i8*, i1} @llvm.type.checked.load(i8* %vtablei8, i32 8, metadata !"typeid")
+  %fptr = extractvalue {i8*, i1} %pair, 0
+  %fptr_casted = bitcast i8* %fptr to i1 (i8*)*
+  ; CHECK: [[VTGEP2:%[^ ]*]] = getelementptr i8, i8* [[VT2]], i64 -5
+  ; CHECK: [[VTLOAD2:%[^ ]*]] = load i8, i8* [[VTGEP2]]
+  ; CHECK: [[VTAND2:%[^ ]*]] = and i8 [[VTLOAD2]], 1
+  ; CHECK: [[VTCMP2:%[^ ]*]] = icmp ne i8 [[VTAND2]], 0
+  %result = call i1 %fptr_casted(i8* %obj)
+  ; CHECK: [[AND2:%[^ ]*]] = and i1 [[VTCMP2]], true
+  %p = extractvalue {i8*, i1} %pair, 1
+  %and = and i1 %result, %p
+  ; CHECK: ret i1 [[AND2]]
+  ret i1 %and
+}
+
+; CHECK: define i32 @call3(
+define i32 @call3(i8* %obj) {
+  %vtableptr = bitcast i8* %obj to [3 x i8*]**
+  %vtable = load [3 x i8*]*, [3 x i8*]** %vtableptr
+  ; CHECK: [[VT3:%[^ ]*]] = bitcast [3 x i8*]* {{.*}} to i8*
+  %vtablei8 = bitcast [3 x i8*]* %vtable to i8*
+  %pair = call {i8*, i1} @llvm.type.checked.load(i8* %vtablei8, i32 16, metadata !"typeid")
+  %fptr = extractvalue {i8*, i1} %pair, 0
+  %fptr_casted = bitcast i8* %fptr to i32 (i8*)*
+  ; CHECK: [[VTGEP3:%[^ ]*]] = getelementptr i8, i8* [[VT3]], i64 -4
+  ; CHECK: [[VTBC3:%[^ ]*]] = bitcast i8* [[VTGEP3]] to i32*
+  ; CHECK: [[VTLOAD3:%[^ ]*]] = load i32, i32* [[VTBC3]]
+  %result = call i32 %fptr_casted(i8* %obj)
+  ; CHECK: ret i32 [[VTLOAD3]]
+  ret i32 %result
+}
+
+declare {i8*, i1} @llvm.type.checked.load(i8*, i32, metadata)
+declare void @llvm.assume(i1)
+declare void @__cxa_pure_virtual()
+
+; CHECK: [[T8]] = !{i32 8, !"typeid"}
+; CHECK: [[T0]] = !{i32 0, !"typeid"}
+
+!0 = !{i32 0, !"typeid"}