derek.holloway
7502bf64a4
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75 lines
2.0 KiB
LLVM
75 lines
2.0 KiB
LLVM
; RUN: opt -S -passes=wholeprogramdevirt %s | FileCheck %s
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; Test that we correctly expand the llvm.type.checked.load.relative intrinsic in
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; cases where we cannot devirtualize.
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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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@vt1 = constant { [2 x i32] } { [2 x i32] [
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i32 trunc (i64 sub (i64 ptrtoint (ptr @vf1 to i64), i64 ptrtoint (ptr @vt1 to i64)) to i32),
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i32 trunc (i64 sub (i64 ptrtoint (ptr @vf2 to i64), i64 ptrtoint (ptr @vt1 to i64)) to i32)
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]}, align 8, !type !0
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!0 = !{i64 0, !"vtable"}
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define void @vf1(ptr %this) {
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ret void
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}
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define void @vf2(ptr %this) {
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ret void
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}
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; CHECK: define void @call_vf1
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; CHECK: [[TT:%.*]] = call i1 @llvm.type.test(ptr [[VT:%.*]], metadata !"vtable")
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; CHECK: br i1 [[TT]]
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; Relative pointer computation at the vtable to the i32 value
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; to get to the pointer value.
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; CHECK: [[F:%.*]] = call ptr @llvm.load.relative.i32(ptr [[VT]], i32 0)
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; CHECK: call void [[F]](ptr
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define void @call_vf1(ptr %obj) {
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%vtable = load ptr, ptr %obj
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%pair = call {ptr, i1} @llvm.type.checked.load.relative(ptr %vtable, i32 0, metadata !"vtable")
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%p = extractvalue {ptr, i1} %pair, 1
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br i1 %p, label %cont, label %trap
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cont:
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%fptr = extractvalue {ptr, i1} %pair, 0
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call void %fptr(ptr %obj)
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ret void
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trap:
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call void @llvm.trap()
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unreachable
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}
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; CHECK: define void @call_vf2
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; CHECK: [[TT:%.*]] = call i1 @llvm.type.test(ptr [[VT:%.*]], metadata !"vtable")
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; CHECK: br i1 [[TT]]
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; CHECK: [[F:%.*]] = call ptr @llvm.load.relative.i32(ptr [[VT]], i32 4)
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; CHECK: call void [[F]](ptr
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define void @call_vf2(ptr %obj) {
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%vtable = load ptr, ptr %obj
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%pair = call {ptr, i1} @llvm.type.checked.load.relative(ptr %vtable, i32 4, metadata !"vtable")
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%p = extractvalue {ptr, i1} %pair, 1
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br i1 %p, label %cont, label %trap
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cont:
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%fptr = extractvalue {ptr, i1} %pair, 0
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call void %fptr(ptr %obj)
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ret void
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trap:
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call void @llvm.trap()
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unreachable
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}
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declare {ptr, i1} @llvm.type.checked.load.relative(ptr, i32, metadata)
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declare void @llvm.trap()
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