1 ; RUN: opt -S -wholeprogramdevirt -pass-remarks=wholeprogramdevirt %s 2>&1 | FileCheck %s 2 3 target datalayout = "e-p:64:64" 4 target triple = "x86_64-unknown-linux-gnu" 5 6 ; CHECK: remark: devirt-single.cc:30:32: single-impl: devirtualized a call to vf 7 ; CHECK: remark: devirt-single.cc:13:0: devirtualized vf 8 ; CHECK-NOT: devirtualized 9 10 @vt1 = constant [1 x i8*] [i8* bitcast (void (i8*)* @vf to i8*)], !type !8 11 @vt2 = constant [1 x i8*] [i8* bitcast (void (i8*)* @vf to i8*)], !type !8 12 13 define void @vf(i8* %this) #0 !dbg !7 { 14 ret void 15 } 16 17 ; CHECK: define void @call 18 define void @call(i8* %obj) #1 !dbg !5 { 19 %vtableptr = bitcast i8* %obj to [1 x i8*]** 20 %vtable = load [1 x i8*]*, [1 x i8*]** %vtableptr 21 %vtablei8 = bitcast [1 x i8*]* %vtable to i8* 22 %p = call i1 @llvm.type.test(i8* %vtablei8, metadata !"typeid") 23 call void @llvm.assume(i1 %p) 24 %fptrptr = getelementptr [1 x i8*], [1 x i8*]* %vtable, i32 0, i32 0 25 %fptr = load i8*, i8** %fptrptr 26 %fptr_casted = bitcast i8* %fptr to void (i8*)* 27 ; CHECK: call void @vf( 28 call void %fptr_casted(i8* %obj), !dbg !6 29 ret void 30 } 31 32 declare i1 @llvm.type.test(i8*, metadata) 33 declare void @llvm.assume(i1) 34 35 !llvm.dbg.cu = !{!0} 36 !llvm.module.flags = !{!2, !3} 37 !llvm.ident = !{!4} 38 39 !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) 40 !1 = !DIFile(filename: "devirt-single.cc", directory: ".") 41 !2 = !{i32 2, !"Dwarf Version", i32 4} 42 !3 = !{i32 2, !"Debug Info Version", i32 3} 43 !4 = !{!"clang version 4.0.0 (trunk 278098)"} 44 !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) 45 !6 = !DILocation(line: 30, column: 32, scope: !5) 46 !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) 47 !8 = !{i32 0, !"typeid"} 48
