f8aaec19e6
Currently, LLParser will create a Function/GlobalVariable forward
reference based on the desired pointer type and then modify it when
it is declared. With opaque pointers, we generally do not know the
correct type to use until we see the declaration.
Solve this by creating the forward reference with a dummy type, and
then performing a RAUW with the correct Function/GlobalVariable when
it is declared. The approach is adopted from
b5b55963f6.
This results in a change to the use list order, which is why we see
test changes on some module passes that are not stable under use list
reordering.
Differential Revision: https://reviews.llvm.org/D104950
142 lines
6.1 KiB
LLVM
142 lines
6.1 KiB
LLVM
; RUN: opt -S -wholeprogramdevirt -whole-program-visibility %s | FileCheck %s
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target datalayout = "e-p:64:64"
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target triple = "x86_64-unknown-linux-gnu"
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; CHECK: [[VT1DATA:@[^ ]*]] = private constant { [8 x i8], [3 x i8*], [0 x i8] } { [8 x i8] c"\00\00\00\01\00\00\00\02", [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]+]]
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@vt1 = constant [3 x i8*] [
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i8* bitcast (i1 (i8*)* @vf0i1 to i8*),
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i8* bitcast (i1 (i8*)* @vf1i1 to i8*),
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i8* bitcast (i32 (i8*)* @vf1i32 to i8*)
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], section "vt1sec", !type !0
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; CHECK: [[VT2DATA:@[^ ]*]] = private constant { [8 x i8], [3 x i8*], [0 x i8] } { [8 x i8] c"\00\00\00\02\00\00\00\01", [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]]
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@vt2 = constant [3 x i8*] [
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i8* bitcast (i1 (i8*)* @vf1i1 to i8*),
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i8* bitcast (i1 (i8*)* @vf0i1 to i8*),
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i8* bitcast (i32 (i8*)* @vf2i32 to i8*)
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], !type !0
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; CHECK: [[VT3DATA:@[^ ]*]] = private constant { [5 x i8], [3 x i8*], [0 x i8] } { [5 x i8] c"\03\00\00\00\02", [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 }, align 1, !type [[T5:![0-9]+]]
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@vt3 = constant [3 x i8*] [
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i8* bitcast (i1 (i8*)* @vf0i1 to i8*),
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i8* bitcast (i1 (i8*)* @vf1i1 to i8*),
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i8* bitcast (i32 (i8*)* @vf3i32 to i8*)
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], align 1, !type !0
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; CHECK: [[VT4DATA:@[^ ]*]] = private constant { [16 x i8], [3 x i8*], [0 x i8] } { [16 x i8] c"\00\00\00\00\00\00\00\00\00\00\00\04\00\00\00\01", [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 }, align 16, !type [[T16:![0-9]+]]
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@vt4 = constant [3 x i8*] [
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i8* bitcast (i1 (i8*)* @vf1i1 to i8*),
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i8* bitcast (i1 (i8*)* @vf0i1 to i8*),
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i8* bitcast (i32 (i8*)* @vf4i32 to i8*)
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], align 16, !type !0
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; CHECK: @vt5 = {{.*}}, !type [[T0:![0-9]+]]
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@vt5 = constant [3 x i8*] [
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i8* bitcast (void ()* @__cxa_pure_virtual to i8*),
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i8* bitcast (void ()* @__cxa_pure_virtual to i8*),
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i8* bitcast (void ()* @__cxa_pure_virtual to i8*)
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], !type !0
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; 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)
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; 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)
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; CHECK: @vt3 = alias [3 x i8*], getelementptr inbounds ({ [5 x i8], [3 x i8*], [0 x i8] }, { [5 x i8], [3 x i8*], [0 x i8] }* [[VT3DATA]], i32 0, i32 1)
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; CHECK: @vt4 = alias [3 x i8*], getelementptr inbounds ({ [16 x i8], [3 x i8*], [0 x i8] }, { [16 x i8], [3 x i8*], [0 x i8] }* [[VT4DATA]], i32 0, i32 1)
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define i1 @vf0i1(i8* %this) readnone {
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ret i1 0
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}
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define i1 @vf1i1(i8* %this) readnone {
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ret i1 1
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}
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define i32 @vf1i32(i8* %this) readnone {
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ret i32 1
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}
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define i32 @vf2i32(i8* %this) readnone {
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ret i32 2
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}
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define i32 @vf3i32(i8* %this) readnone {
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ret i32 3
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}
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define i32 @vf4i32(i8* %this) readnone {
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ret i32 4
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}
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; CHECK: define i1 @call1(
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define i1 @call1(i8* %obj) {
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%vtableptr = bitcast i8* %obj to [3 x i8*]**
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%vtable = load [3 x i8*]*, [3 x i8*]** %vtableptr
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; CHECK: {{.*}} = bitcast [3 x i8*]* {{.*}} to i8*
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; CHECK: [[VT1:%[^ ]*]] = bitcast [3 x i8*]* {{.*}} to i8*
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%vtablei8 = bitcast [3 x i8*]* %vtable to i8*
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%p = call i1 @llvm.type.test(i8* %vtablei8, metadata !"typeid")
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call void @llvm.assume(i1 %p)
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%fptrptr = getelementptr [3 x i8*], [3 x i8*]* %vtable, i32 0, i32 0
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%fptr = load i8*, i8** %fptrptr
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%fptr_casted = bitcast i8* %fptr to i1 (i8*)*
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; CHECK: [[VTGEP1:%[^ ]*]] = getelementptr i8, i8* [[VT1]], i32 -1
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; CHECK: [[VTLOAD1:%[^ ]*]] = load i8, i8* [[VTGEP1]]
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; CHECK: [[VTAND1:%[^ ]*]] = and i8 [[VTLOAD1]], 1
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; CHECK: [[VTCMP1:%[^ ]*]] = icmp ne i8 [[VTAND1]], 0
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%result = call i1 %fptr_casted(i8* %obj)
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; CHECK: ret i1 [[VTCMP1]]
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ret i1 %result
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}
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; CHECK: define i1 @call2(
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define i1 @call2(i8* %obj) {
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%vtableptr = bitcast i8* %obj to [3 x i8*]**
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%vtable = load [3 x i8*]*, [3 x i8*]** %vtableptr
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; CHECK: {{.*}} = bitcast [3 x i8*]* {{.*}} to i8*
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; CHECK: [[VT2:%[^ ]*]] = bitcast [3 x i8*]* {{.*}} to i8*
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%vtablei8 = bitcast [3 x i8*]* %vtable to i8*
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%p = call i1 @llvm.type.test(i8* %vtablei8, metadata !"typeid")
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call void @llvm.assume(i1 %p)
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%fptrptr = getelementptr [3 x i8*], [3 x i8*]* %vtable, i32 0, i32 1
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%fptr = load i8*, i8** %fptrptr
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%fptr_casted = bitcast i8* %fptr to i1 (i8*)*
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; CHECK: [[VTGEP2:%[^ ]*]] = getelementptr i8, i8* [[VT2]], i32 -1
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; CHECK: [[VTLOAD2:%[^ ]*]] = load i8, i8* [[VTGEP2]]
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; CHECK: [[VTAND2:%[^ ]*]] = and i8 [[VTLOAD2]], 2
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; CHECK: [[VTCMP2:%[^ ]*]] = icmp ne i8 [[VTAND2]], 0
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%result = call i1 %fptr_casted(i8* %obj)
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; CHECK: ret i1 [[VTCMP2]]
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ret i1 %result
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}
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; CHECK: define i32 @call3(
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define i32 @call3(i8* %obj) {
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%vtableptr = bitcast i8* %obj to [3 x i8*]**
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%vtable = load [3 x i8*]*, [3 x i8*]** %vtableptr
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; CHECK: {{.*}} = bitcast [3 x i8*]* {{.*}} to i8*
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; CHECK: [[VT3:%[^ ]*]] = bitcast [3 x i8*]* {{.*}} to i8*
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%vtablei8 = bitcast [3 x i8*]* %vtable to i8*
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%p = call i1 @llvm.type.test(i8* %vtablei8, metadata !"typeid")
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call void @llvm.assume(i1 %p)
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%fptrptr = getelementptr [3 x i8*], [3 x i8*]* %vtable, i32 0, i32 2
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%fptr = load i8*, i8** %fptrptr
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%fptr_casted = bitcast i8* %fptr to i32 (i8*)*
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; CHECK: [[VTGEP3:%[^ ]*]] = getelementptr i8, i8* [[VT3]], i32 -5
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; CHECK: [[VTBC3:%[^ ]*]] = bitcast i8* [[VTGEP3]] to i32*
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; CHECK: [[VTLOAD3:%[^ ]*]] = load i32, i32* [[VTBC3]]
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%result = call i32 %fptr_casted(i8* %obj)
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; CHECK: ret i32 [[VTLOAD3]]
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ret i32 %result
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}
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declare i1 @llvm.type.test(i8*, metadata)
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declare void @llvm.assume(i1)
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declare void @__cxa_pure_virtual()
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; CHECK: [[T8]] = !{i32 8, !"typeid"}
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; CHECK: [[T5]] = !{i32 5, !"typeid"}
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; CHECK: [[T16]] = !{i32 16, !"typeid"}
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; CHECK: [[T0]] = !{i32 0, !"typeid"}
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!0 = !{i32 0, !"typeid"}
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