1 ; RUN: opt < %s -gvn -S | FileCheck %s 2 ; 3 ; Produced at -O2 from: 4 ; int a, b; 5 ; void f1(int *p1) { 6 ; if (b) 7 ; a = 1; 8 ; if (a && *p1) 9 ; f4(); 10 ; } 11 ; int f2(int); 12 ; void f3(void) { 13 ; a = f2(1); 14 ; f1(&a); 15 ; } 16 source_filename = "test/DebugInfo/Generic/gvn.ll" 17 target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128" 18 target triple = "arm64-apple-ios" 19 20 @a = common global i32 0, align 4, !dbg !0 21 @b = common global i32 0, align 4, !dbg !6 22 23 ; Function Attrs: nounwind 24 define void @f3() #0 !dbg !12 { 25 entry: 26 ; Verify that the call still has a debug location after GVN. 27 ; CHECK: %call = tail call i32 @f2(i32 1) #{{[0-9]}}, !dbg 28 %call = tail call i32 @f2(i32 1) #0, !dbg !15 29 store i32 %call, i32* @a, align 4, !dbg !15, !tbaa !24 30 tail call void @llvm.dbg.value(metadata i32* @a, metadata !22, metadata !28) #0, !dbg !29 31 %0 = load i32, i32* @b, align 4, !dbg !29, !tbaa !24 32 %tobool.i = icmp eq i32 %0, 0, !dbg !29 33 br i1 %tobool.i, label %if.end.i, label %land.lhs.true.i.thread, !dbg !30 34 35 land.lhs.true.i.thread: ; preds = %entry 36 store i32 1, i32* @a, align 4, !dbg !32, !tbaa !24 37 br label %if.then.3.i, !dbg !33 38 39 ; This instruction has no debug location -- in this 40 ; particular case it was removed by a bug in SimplifyCFG. 41 if.end.i: ; preds = %entry 42 %.pr = load i32, i32* @a, align 4 43 ; GVN is supposed to replace the load of %.pr with a direct reference to %call. 44 ; CHECK: %tobool2.i = icmp eq i32 %call, 0, !dbg 45 %tobool2.i = icmp eq i32 %.pr, 0, !dbg !34 46 br i1 %tobool2.i, label %f1.exit, label %if.then.3.i, !dbg !34 47 48 if.then.3.i: ; preds = %if.end.i, %land.lhs.true.i.thread 49 %call.i = tail call i32 bitcast (i32 (...)* @f4 to i32 ()*)() #0, !dbg !35 50 br label %f1.exit, !dbg !35 51 52 f1.exit: ; preds = %if.then.3.i, %if.end.i 53 ret void, !dbg !36 54 } 55 56 declare i32 @f2(i32) 57 58 declare i32 @f4(...) 59 60 ; Function Attrs: nounwind readnone 61 declare void @llvm.dbg.value(metadata, metadata, metadata) #1 62 63 attributes #0 = { nounwind } 64 attributes #1 = { nounwind readnone } 65 66 !llvm.dbg.cu = !{!2} 67 !llvm.module.flags = !{!9, !10} 68 !llvm.ident = !{!11} 69 70 !0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression()) 71 !1 = !DIGlobalVariable(name: "a", scope: !2, file: !3, line: 1, type: !8, isLocal: false, isDefinition: true) 72 !2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 3.8.0 (trunk 245562) (llvm/trunk 245569)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5) 73 !3 = !DIFile(filename: "test.c", directory: "/") 74 !4 = !{} 75 !5 = !{!0, !6} 76 !6 = !DIGlobalVariableExpression(var: !7, expr: !DIExpression()) 77 !7 = !DIGlobalVariable(name: "b", scope: !2, file: !3, line: 1, type: !8, isLocal: false, isDefinition: true) 78 !8 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 79 !9 = !{i32 2, !"Dwarf Version", i32 2} 80 !10 = !{i32 2, !"Debug Info Version", i32 3} 81 !11 = !{!"clang version 3.8.0 (trunk 245562) (llvm/trunk 245569)"} 82 !12 = distinct !DISubprogram(name: "f3", scope: !3, file: !3, line: 9, type: !13, isLocal: false, isDefinition: true, scopeLine: 9, flags: DIFlagPrototyped, isOptimized: true, unit: !2, retainedNodes: !4) 83 !13 = !DISubroutineType(types: !14) 84 !14 = !{null} 85 !15 = !DILocation(line: 5, scope: !16, inlinedAt: !23) 86 !16 = distinct !DILexicalBlock(scope: !17, file: !3, line: 5) 87 !17 = distinct !DISubprogram(name: "f1", scope: !3, file: !3, line: 2, type: !18, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: true, unit: !2, retainedNodes: !21) 88 !18 = !DISubroutineType(types: !19) 89 !19 = !{null, !20} 90 !20 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !8, size: 64, align: 64) 91 !21 = !{!22} 92 !22 = !DILocalVariable(name: "p1", arg: 1, scope: !17, file: !3, line: 2, type: !20) 93 !23 = distinct !DILocation(line: 11, scope: !12) 94 !24 = !{!25, !25, i64 0} 95 !25 = !{!"int", !26, i64 0} 96 !26 = !{!"omnipotent char", !27, i64 0} 97 !27 = !{!"Simple C/C++ TBAA"} 98 !28 = !DIExpression() 99 !29 = !DILocation(line: 2, scope: !17, inlinedAt: !23) 100 !30 = !DILocation(line: 3, scope: !31, inlinedAt: !23) 101 !31 = distinct !DILexicalBlock(scope: !17, file: !3, line: 3) 102 !32 = !DILocation(line: 3, scope: !17, inlinedAt: !23) 103 !33 = !DILocation(line: 4, scope: !31, inlinedAt: !23) 104 !34 = !DILocation(line: 5, scope: !17, inlinedAt: !23) 105 !35 = !DILocation(line: 6, scope: !16, inlinedAt: !23) 106 !36 = !DILocation(line: 12, scope: !12) 107 108
