48 lines
2.1 KiB
LLVM
48 lines
2.1 KiB
LLVM
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; RUN: opt -S -wholeprogramdevirt -whole-program-visibility -pass-remarks=wholeprogramdevirt %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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; CHECK: remark: devirt-single.cc:30:32: single-impl: devirtualized a call to vf
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; CHECK: remark: devirt-single.cc:13:0: devirtualized vf
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; CHECK-NOT: devirtualized
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@vt1 = constant [1 x i8*] [i8* bitcast (void (i8*)* @vf to i8*)], !type !8
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@vt2 = constant [1 x i8*] [i8* bitcast (void (i8*)* @vf to i8*)], !type !8
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define void @vf(i8* %this) #0 !dbg !7 {
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ret void
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}
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; CHECK: define void @call
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define void @call(i8* %obj) #1 !dbg !5 {
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%vtableptr = bitcast i8* %obj to [1 x i8*]**
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%vtable = load [1 x i8*]*, [1 x i8*]** %vtableptr
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%vtablei8 = bitcast [1 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 [1 x i8*], [1 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 void (i8*)*
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; CHECK: call void @vf(
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call void %fptr_casted(i8* %obj), !dbg !6
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ret void
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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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!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)
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!6 = !DILocation(line: 30, column: 32, scope: !5)
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!7 = distinct !DISubprogram(name: "vf", linkageName: "_ZN3vt12vfEv", scope: !1, file: !1, line: 13, isLocal: false, isDefinition: true, scopeLine: 13, flags: DIFlagPrototyped, isOptimized: false, unit: !0)
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!8 = !{i32 0, !"typeid"}
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