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llvm-project/llvm/test/Transforms/WholeProgramDevirt/virtual-const-prop-end.ll
PiJoules 649b7994fb
[NFC][WPD] Add constant propagation tests checking relative vtables (#138989) 
This is a patch with precommitted tests to make
https://github.com/llvm/llvm-project/pull/136630 easier to review. The
`virtual-const-prop-small-alignment-*` tests check the output when the
loaded int alignment is less than the vtable alignment.

This also changes some constants to make it easier to differentiate
between propagated values in vtables.
2025-05-13 11:50:11 -07:00

183 lines
7.3 KiB
LLVM
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; RUN: opt -S -passes=wholeprogramdevirt -whole-program-visibility %s | FileCheck %s
target datalayout = "e-p:64:64"
; CHECK: [[VT1DATA:@[^ ]*]] = private constant { [0 x i8], [4 x ptr], [5 x i8] } { [0 x i8] zeroinitializer, [4 x ptr] [ptr null, ptr @vf0i1, ptr @vf1i1, ptr @vf1i32], [5 x i8] c"\02\03\00\00\00" }, !type [[T8:![0-9]+]]
@vt1 = constant [4 x ptr] [
ptr null,
ptr @vf0i1,
ptr @vf1i1,
ptr @vf1i32
], !type !1
; CHECK: [[VT2DATA:@[^ ]*]] = private constant { [0 x i8], [3 x ptr], [5 x i8] } { [0 x i8] zeroinitializer, [3 x ptr] [ptr @vf1i1, ptr @vf0i1, ptr @vf2i32], [5 x i8] c"\01\04\00\00\00" }, !type [[T0:![0-9]+]]
@vt2 = constant [3 x ptr] [
ptr @vf1i1,
ptr @vf0i1,
ptr @vf2i32
], !type !0
; CHECK: [[VT3DATA:@[^ ]*]] = private constant { [0 x i8], [4 x ptr], [5 x i8] } { [0 x i8] zeroinitializer, [4 x ptr] [ptr null, ptr @vf0i1, ptr @vf1i1, ptr @vf3i32], [5 x i8] c"\02\05\00\00\00" }, !type [[T8]]
@vt3 = constant [4 x ptr] [
ptr null,
ptr @vf0i1,
ptr @vf1i1,
ptr @vf3i32
], !type !1
; CHECK: [[VT4DATA:@[^ ]*]] = private constant { [0 x i8], [3 x ptr], [5 x i8] } { [0 x i8] zeroinitializer, [3 x ptr] [ptr @vf1i1, ptr @vf0i1, ptr @vf4i32], [5 x i8] c"\01\06\00\00\00" }, !type [[T0]]
@vt4 = constant [3 x ptr] [
ptr @vf1i1,
ptr @vf0i1,
ptr @vf4i32
], !type !0
;; Test relative vtables
; CHECK: [[VT6RELDATA:@[^ ]*]] = private constant { [0 x i8], [4 x i32], [4 x i8] } { [0 x i8] zeroinitializer, [4 x i32] [
; CHECK-SAME: i32 0,
; CHECK-SAME: i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @vf1i1 to i64), i64 ptrtoint (ptr @vt5_rel to i64)) to i32),
; CHECK-SAME: i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @vf0i1 to i64), i64 ptrtoint (ptr @vt5_rel to i64)) to i32),
; CHECK-SAME: i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @vf2i32 to i64), i64 ptrtoint (ptr @vt5_rel to i64)) to i32)
; CHECK-SAME: ], [4 x i8] c"\04\00\00\00" }, !type [[TREL:![0-9]+]]
@vt5_rel = constant [4 x i32] [
i32 zeroinitializer,
i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @vf1i1 to i64), i64 ptrtoint (ptr @vt5_rel to i64)) to i32),
i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @vf0i1 to i64), i64 ptrtoint (ptr @vt5_rel to i64)) to i32),
i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @vf2i32 to i64), i64 ptrtoint (ptr @vt5_rel to i64)) to i32)
], !type !3
; CHECK: [[VT7RELDATA:@[^ ]*]] = private constant { [0 x i8], [3 x i32], [4 x i8] } { [0 x i8] zeroinitializer, [3 x i32] [
; CHECK-SAME: i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @vf0i1 to i64), i64 ptrtoint (ptr @vt6_rel to i64)) to i32),
; CHECK-SAME: i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @vf1i1 to i64), i64 ptrtoint (ptr @vt6_rel to i64)) to i32),
; CHECK-SAME: i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @vf4i32 to i64), i64 ptrtoint (ptr @vt6_rel to i64)) to i32)
; CHECK-SAME: ], [4 x i8] c"\06\00\00\00" }, !type [[TREL2:![0-9]+]]
@vt6_rel = constant [3 x i32] [
i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @vf0i1 to i64), i64 ptrtoint (ptr @vt6_rel to i64)) to i32),
i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @vf1i1 to i64), i64 ptrtoint (ptr @vt6_rel to i64)) to i32),
i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @vf4i32 to i64), i64 ptrtoint (ptr @vt6_rel to i64)) to i32)
], !type !2
; CHECK: @vt1 = alias [4 x ptr], getelementptr inbounds ({ [0 x i8], [4 x ptr], [5 x i8] }, ptr [[VT1DATA]], i32 0, i32 1)
; CHECK: @vt2 = alias [3 x ptr], getelementptr inbounds ({ [0 x i8], [3 x ptr], [5 x i8] }, ptr [[VT2DATA]], i32 0, i32 1)
; CHECK: @vt3 = alias [4 x ptr], getelementptr inbounds ({ [0 x i8], [4 x ptr], [5 x i8] }, ptr [[VT3DATA]], i32 0, i32 1)
; CHECK: @vt4 = alias [3 x ptr], getelementptr inbounds ({ [0 x i8], [3 x ptr], [5 x i8] }, ptr [[VT4DATA]], i32 0, i32 1)
define i1 @vf0i1(ptr %this) readnone {
ret i1 0
}
define i1 @vf1i1(ptr %this) readnone {
ret i1 1
}
define i32 @vf1i32(ptr %this) readnone {
ret i32 3
}
define i32 @vf2i32(ptr %this) readnone {
ret i32 4
}
define i32 @vf3i32(ptr %this) readnone {
ret i32 5
}
define i32 @vf4i32(ptr %this) readnone {
ret i32 6
}
; CHECK: define i1 @call1(
define i1 @call1(ptr %obj) {
%vtable = load ptr, ptr %obj
%p = call i1 @llvm.type.test(ptr %vtable, metadata !"typeid")
call void @llvm.assume(i1 %p)
%fptr = load ptr, ptr %vtable
; CHECK: [[VTGEP1:%[^ ]*]] = getelementptr i8, ptr %vtable, i32 24
; CHECK: [[VTLOAD1:%[^ ]*]] = load i8, ptr [[VTGEP1]]
; CHECK: [[VTAND1:%[^ ]*]] = and i8 [[VTLOAD1]], 1
; CHECK: [[VTCMP1:%[^ ]*]] = icmp ne i8 [[VTAND1]], 0
%result = call i1 %fptr(ptr %obj)
; CHECK: ret i1 [[VTCMP1]]
ret i1 %result
}
; CHECK: define i1 @call2(
define i1 @call2(ptr %obj) {
%vtable = load ptr, ptr %obj
%p = call i1 @llvm.type.test(ptr %vtable, metadata !"typeid")
call void @llvm.assume(i1 %p)
%fptrptr = getelementptr [3 x ptr], ptr %vtable, i32 0, i32 1
%fptr = load ptr, ptr %fptrptr
; CHECK: [[VTGEP2:%[^ ]*]] = getelementptr i8, ptr %vtable, i32 24
; CHECK: [[VTLOAD2:%[^ ]*]] = load i8, ptr [[VTGEP2]]
; CHECK: [[VTAND2:%[^ ]*]] = and i8 [[VTLOAD2]], 2
; CHECK: [[VTCMP2:%[^ ]*]] = icmp ne i8 [[VTAND2]], 0
%result = call i1 %fptr(ptr %obj)
; CHECK: ret i1 [[VTCMP2]]
ret i1 %result
}
; CHECK: define i32 @call3(
define i32 @call3(ptr %obj) {
%vtable = load ptr, ptr %obj
%p = call i1 @llvm.type.test(ptr %vtable, metadata !"typeid")
call void @llvm.assume(i1 %p)
%fptrptr = getelementptr [3 x ptr], ptr %vtable, i32 0, i32 2
%fptr = load ptr, ptr %fptrptr
; CHECK: [[VTGEP3:%[^ ]*]] = getelementptr i8, ptr %vtable, i32 25
; CHECK: [[VTLOAD3:%[^ ]*]] = load i32, ptr [[VTGEP3]]
%result = call i32 %fptr(ptr %obj)
; CHECK: ret i32 [[VTLOAD3]]
ret i32 %result
}
; CHECK: define i1 @call1_rel(
define i1 @call1_rel(ptr %obj) {
%vtable = load ptr, ptr %obj
%p = call i1 @llvm.type.test(ptr %vtable, metadata !"typeid2")
call void @llvm.assume(i1 %p)
%fptr = call ptr @llvm.load.relative.i32(ptr %vtable, i32 0)
%result = call i1 %fptr(ptr %obj)
ret i1 %result
; CHECK: [[RES:%.*]] = icmp eq ptr %vtable, getelementptr (i8, ptr @vt5_rel, i64 4)
; CHECK: ret i1 [[RES]]
}
; CHECK: define i1 @call2_rel(
define i1 @call2_rel(ptr %obj) {
%vtable = load ptr, ptr %obj
%p = call i1 @llvm.type.test(ptr %vtable, metadata !"typeid2")
call void @llvm.assume(i1 %p)
%fptr = call ptr @llvm.load.relative.i32(ptr %vtable, i32 4)
%result = call i1 %fptr(ptr %obj)
ret i1 %result
; CHECK: [[RES:%[^ ]*]] = icmp eq ptr %vtable, @vt6_rel
; CHECK: ret i1 [[RES]]
}
; CHECK: define i32 @call3_rel(
define i32 @call3_rel(ptr %obj) {
%vtable = load ptr, ptr %obj
%p = call i1 @llvm.type.test(ptr %vtable, metadata !"typeid2")
call void @llvm.assume(i1 %p)
%fptr = call ptr @llvm.load.relative.i32(ptr %vtable, i32 8)
; CHECK: [[VTGEP3:%[^ ]*]] = getelementptr i8, ptr %vtable, i32 12
; CHECK: [[VTLOAD3:%[^ ]*]] = load i32, ptr [[VTGEP3]]
%result = call i32 %fptr(ptr %obj)
; CHECK: ret i32 [[VTLOAD3]]
ret i32 %result
}
declare i1 @llvm.type.test(ptr, metadata)
declare void @llvm.assume(i1)
; CHECK: [[T8]] = !{i32 8, !"typeid"}
; CHECK: [[T0]] = !{i32 0, !"typeid"}
; CHECK: [[TREL]] = !{i32 4, !"typeid2"}
; CHECK: [[TREL2]] = !{i32 0, !"typeid2"}
!0 = !{i32 0, !"typeid"}
!1 = !{i32 8, !"typeid"}
!2 = !{i32 0, !"typeid2"}
!3 = !{i32 4, !"typeid2"}
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