xref: /aosp_15_r20/external/llvm/test/Transforms/WholeProgramDevirt/virtual-const-prop-end.ll (revision 9880d6810fe72a1726cb53787c6711e909410d58)

; RUN: opt -S -wholeprogramdevirt %s | FileCheck %s

target datalayout = "e-p:64:64"
target triple = "x86_64-unknown-linux-gnu"

; CHECK: [[VT1DATA:@[^ ]*]] = private constant { [0 x i8], [4 x i8*], [8 x i8] } { [0 x i8] zeroinitializer, [4 x i8*] [i8* null, i8* bitcast (i1 (i8*)* @vf0i1 to i8*), i8* bitcast (i1 (i8*)* @vf1i1 to i8*), i8* bitcast (i32 (i8*)* @vf1i32 to i8*)], [8 x i8] c"\01\00\00\00\01\00\00\00" }, !type [[T8:![0-9]+]]
@vt1 = constant [4 x i8*] [
i8* null,
i8* bitcast (i1 (i8*)* @vf0i1 to i8*),
i8* bitcast (i1 (i8*)* @vf1i1 to i8*),
i8* bitcast (i32 (i8*)* @vf1i32 to i8*)
], !type !1

; CHECK: [[VT2DATA:@[^ ]*]] = private constant { [0 x i8], [3 x i8*], [8 x i8] } { [0 x i8] zeroinitializer, [3 x i8*] [i8* bitcast (i1 (i8*)* @vf1i1 to i8*), i8* bitcast (i1 (i8*)* @vf0i1 to i8*), i8* bitcast (i32 (i8*)* @vf2i32 to i8*)], [8 x i8] c"\02\00\00\00\02\00\00\00" }, !type [[T0:![0-9]+]]
@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 { [0 x i8], [4 x i8*], [8 x i8] } { [0 x i8] zeroinitializer, [4 x i8*] [i8* null, i8* bitcast (i1 (i8*)* @vf0i1 to i8*), i8* bitcast (i1 (i8*)* @vf1i1 to i8*), i8* bitcast (i32 (i8*)* @vf3i32 to i8*)], [8 x i8] c"\03\00\00\00\01\00\00\00" }, !type [[T8]]
@vt3 = constant [4 x i8*] [
i8* null,
i8* bitcast (i1 (i8*)* @vf0i1 to i8*),
i8* bitcast (i1 (i8*)* @vf1i1 to i8*),
i8* bitcast (i32 (i8*)* @vf3i32 to i8*)
], !type !1

; CHECK: [[VT4DATA:@[^ ]*]] = private constant { [0 x i8], [3 x i8*], [8 x i8] } { [0 x i8] zeroinitializer, [3 x i8*] [i8* bitcast (i1 (i8*)* @vf1i1 to i8*), i8* bitcast (i1 (i8*)* @vf0i1 to i8*), i8* bitcast (i32 (i8*)* @vf4i32 to i8*)], [8 x i8] c"\04\00\00\00\02\00\00\00" }, !type [[T0]]
@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: @vt1 = alias [4 x i8*], getelementptr inbounds ({ [0 x i8], [4 x i8*], [8 x i8] }, { [0 x i8], [4 x i8*], [8 x i8] }* [[VT1DATA]], i32 0, i32 1)
; CHECK: @vt2 = alias [3 x i8*], getelementptr inbounds ({ [0 x i8], [3 x i8*], [8 x i8] }, { [0 x i8], [3 x i8*], [8 x i8] }* [[VT2DATA]], i32 0, i32 1)
; CHECK: @vt3 = alias [4 x i8*], getelementptr inbounds ({ [0 x i8], [4 x i8*], [8 x i8] }, { [0 x i8], [4 x i8*], [8 x i8] }* [[VT3DATA]], i32 0, i32 1)
; CHECK: @vt4 = alias [3 x i8*], getelementptr inbounds ({ [0 x i8], [3 x i8*], [8 x i8] }, { [0 x i8], [3 x i8*], [8 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*
  %p = call i1 @llvm.type.test(i8* %vtablei8, metadata !"typeid")
  call void @llvm.assume(i1 %p)
  %fptrptr = getelementptr [3 x i8*], [3 x i8*]* %vtable, i32 0, i32 0
  %fptr = load i8*, i8** %fptrptr
  %fptr_casted = bitcast i8* %fptr to i1 (i8*)*
  ; CHECK: [[VTGEP1:%[^ ]*]] = getelementptr i8, i8* [[VT1]], i64 28
  ; 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: ret i1 [[VTCMP1]]
  ret i1 %result
}

; 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*
  %p = call i1 @llvm.type.test(i8* %vtablei8, metadata !"typeid")
  call void @llvm.assume(i1 %p)
  %fptrptr = getelementptr [3 x i8*], [3 x i8*]* %vtable, i32 0, i32 1
  %fptr = load i8*, i8** %fptrptr
  %fptr_casted = bitcast i8* %fptr to i1 (i8*)*
  ; CHECK: [[VTGEP2:%[^ ]*]] = getelementptr i8, i8* [[VT2]], i64 28
  ; 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: ret i1 [[VTCMP2]]
  ret i1 %result
}

; 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*
  %p = call i1 @llvm.type.test(i8* %vtablei8, metadata !"typeid")
  call void @llvm.assume(i1 %p)
  %fptrptr = getelementptr [3 x i8*], [3 x i8*]* %vtable, i32 0, i32 2
  %fptr = load i8*, i8** %fptrptr
  %fptr_casted = bitcast i8* %fptr to i32 (i8*)*
  ; CHECK: [[VTGEP3:%[^ ]*]] = getelementptr i8, i8* [[VT3]], i64 24
  ; 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 i1 @llvm.type.test(i8*, metadata)
declare void @llvm.assume(i1)

; CHECK: [[T8]] = !{i32 8, !"typeid"}
; CHECK: [[T0]] = !{i32 0, !"typeid"}

!0 = !{i32 0, !"typeid"}
!1 = !{i32 8, !"typeid"}