derek.holloway
7502bf64a4
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66 lines
2.8 KiB
LLVM
66 lines
2.8 KiB
LLVM
; Test that the needed intrinsics for devirtualization are preserved and not dropped by other
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; optimizations.
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; RUN: opt -S -O3 %s 2>&1 | 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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@vt1 = constant [1 x ptr] [ptr @vf], !type !8
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@vt2 = constant [1 x ptr] [ptr @vf2], !type !12
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define i1 @vf(ptr %this) #0 !dbg !7 {
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ret i1 true
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}
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define i1 @vf2(ptr %this) !dbg !11 {
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ret i1 false
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}
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define void @call(ptr %obj) #1 !dbg !5 {
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%vtable = load ptr, ptr %obj
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; CHECK: [[P:%[^ ]*]] = tail call i1 @llvm.public.type.test(ptr [[VT:%[^ ]*]], metadata !"typeid")
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; CHECK-NEXT: call void @llvm.assume(i1 [[P]])
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%p = call i1 @llvm.public.type.test(ptr %vtable, metadata !"typeid")
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call void @llvm.assume(i1 %p)
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%fptr = load ptr, ptr %vtable
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call i1 %fptr(ptr %obj), !dbg !6
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ret void
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}
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define void @call1(ptr %obj) #1 !dbg !9 {
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%vtable = load ptr, ptr %obj
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; CHECK: [[P:%[^ ]*]] = tail call i1 @llvm.type.test(ptr [[VT:%[^ ]*]], metadata !"typeid1")
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; CHECK-NEXT: call void @llvm.assume(i1 [[P]])
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%p = call i1 @llvm.type.test(ptr %vtable, metadata !"typeid1")
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call void @llvm.assume(i1 %p)
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%fptr = load ptr, ptr %vtable, align 8
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%1 = call i1 %fptr(ptr %obj), !dbg !10
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ret void
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}
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declare i1 @llvm.type.test(ptr, metadata)
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declare i1 @llvm.public.type.test(ptr, metadata)
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declare void @llvm.assume(i1)
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!2, !3}
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!llvm.ident = !{!4}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 4.0.0 (trunk 278098)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
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!1 = !DIFile(filename: "devirt-single.cc", directory: ".")
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!2 = !{i32 2, !"Dwarf Version", i32 4}
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!3 = !{i32 2, !"Debug Info Version", i32 3}
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!4 = !{!"clang version 4.0.0 (trunk 278098)"}
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!5 = distinct !DISubprogram(name: "call", linkageName: "_Z4callPv", scope: !1, file: !1, line: 29, isLocal: false, isDefinition: true, scopeLine: 9, flags: DIFlagPrototyped, isOptimized: false, unit: !0, type: !14)
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!6 = !DILocation(line: 30, column: 32, scope: !5)
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!7 = distinct !DISubprogram(name: "vf", linkageName: "_ZN3vt12vfEb", scope: !1, file: !1, line: 13, isLocal: false, isDefinition: true, scopeLine: 13, flags: DIFlagPrototyped, isOptimized: false, unit: !0, type: !14)
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!8 = !{i32 0, !"typeid"}
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!9 = distinct !DISubprogram(name: "call1", linkageName: "_Z5call1Pv", scope: !1, file: !1, line: 31, isLocal: false, isDefinition: true, scopeLine: 9, flags: DIFlagPrototyped, isOptimized: false, unit: !0, type: !14)
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!10 = !DILocation(line: 35, column: 32, scope: !9)
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!11 = distinct !DISubprogram(name: "vf2", linkageName: "_ZN3vt13vf2Eb", scope: !1, file: !1, line: 23, isLocal: false, isDefinition: true, scopeLine: 23, flags: DIFlagPrototyped, isOptimized: false, unit: !0, type: !14)
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!12 = !{i32 0, !"typeid1"}
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!13 = !{null}
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!14 = !DISubroutineType(types: !13)
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