1; RUN: llc -O0 < %s | FileCheck %s 2 3source_filename = "t.c" 4target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32" 5target triple = "i386-pc-windows-msvc19.0.24215" 6 7@str_const = internal unnamed_addr constant [4 x i8] c"str\00", align 1 8 9declare i32 @puts(i8*) 10declare void @use_i32(i32*) 11declare void @llvm.dbg.value(metadata, metadata, metadata) nounwind readnone 12 13; We had a line info quality issue where the LEA for the string constant had no 14; location info, so the .cv_loc directive appeared after it. Now we have logic 15; that tries to emit the first valid location to the top of each MBB. 16 17define void @lea_str_loc(i1 %cond) !dbg !8 { 18entry: 19 br i1 %cond, label %if.then, label %if.end, !dbg !17 20 21if.then: ; preds = %entry 22 br label %return, !dbg !18 23 24if.end: ; preds = %entry 25 %call = call i32 @puts(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @str_const, i32 0, i32 0)), !dbg !19 26 br label %return, !dbg !20 27 28return: ; preds = %if.end, %if.then 29 ret void, !dbg !20 30} 31 32; The t.c:5 line marker should appear immediately after the BB label. 33 34; CHECK-LABEL: _lea_str_loc: 35; CHECK: .cv_loc {{.*}} # t.c:4:5 36; CHECK: jmp LBB{{.*}} 37; CHECK: LBB0_{{.*}}: # %if.end 38; CHECK-NEXT: .cv_loc {{.*}} # t.c:5:3 39; CHECK-NEXT: leal _str_const, %[[reg:[^ ]*]] 40; CHECK-NEXT: movl %[[reg]], (%esp) 41; CHECK-NEXT: calll _puts 42 43define void @instr_no_loc(i1 %cond) !dbg !21 { 44entry: 45 br i1 %cond, label %if.then, label %if.end, !dbg !22 46 47if.then: ; preds = %entry 48 br label %return, !dbg !23 49 50if.end: ; preds = %entry 51 call void asm sideeffect "nop", ""() 52 %call = call i32 @puts(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @str_const, i32 0, i32 0)), !dbg !24 53 br label %return, !dbg !25 54 55return: ; preds = %if.end, %if.then 56 ret void, !dbg !25 57} 58 59; CHECK-LABEL: _instr_no_loc: 60; CHECK: .cv_loc {{.*}} # t.c:4:5 61; CHECK: jmp LBB{{.*}} 62; CHECK: LBB1_{{.*}}: # %if.end 63; CHECK-NEXT: .cv_loc {{.*}} # t.c:5:3 64; CHECK-NEXT: #APP 65; CHECK-NEXT: nop 66; CHECK-NEXT: #NO_APP 67; CHECK-NEXT: leal _str_const, %[[reg:[^ ]*]] 68; CHECK-NEXT: movl %[[reg]], (%esp) 69; CHECK-NEXT: calll _puts 70 71define void @lea_dbg_value(i1 %cond) !dbg !30 { 72entry: 73 %value = alloca i32 74 store i32 42, i32* %value 75 br i1 %cond, label %if.then, label %if.end, !dbg !31 76 77if.then: ; preds = %entry 78 br label %return, !dbg !32 79 80if.end: ; preds = %entry 81 call void @llvm.dbg.value(metadata i32* %value, metadata !35, metadata !13), !dbg !34 82 call void @use_i32(i32* %value), !dbg !33 83 br label %return, !dbg !34 84 85return: ; preds = %if.end, %if.then 86 ret void, !dbg !34 87} 88 89; CHECK-LABEL: _lea_dbg_value: 90; CHECK: .cv_loc {{.*}} # t.c:4:5 91; CHECK: jmp LBB{{.*}} 92; CHECK: LBB2_{{.*}}: # %if.end 93; CHECK-NEXT: .cv_loc {{.*}} # t.c:5:3 94; CHECK: leal 4(%esp), %[[reg:[^ ]*]] 95; CHECK: #DEBUG_VALUE: lea_dbg_value:v <- [DW_OP_deref] $[[reg]] 96; CHECK: movl %[[reg]], (%esp) 97; CHECK: calll _use_i32 98 99!llvm.dbg.cu = !{!0} 100!llvm.module.flags = !{!3, !4, !5, !6} 101!llvm.ident = !{!7} 102 103!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 5.0.0 ", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2) 104!1 = !DIFile(filename: "t.c", directory: "C:\5Csrc\5Cllvm-project\5Cbuild", checksumkind: CSK_MD5, checksum: "b32df088e991f1996b4e4deb3855c14b") 105!2 = !{} 106!3 = !{i32 1, !"NumRegisterParameters", i32 0} 107!4 = !{i32 2, !"CodeView", i32 1} 108!5 = !{i32 2, !"Debug Info Version", i32 3} 109!6 = !{i32 1, !"wchar_size", i32 2} 110!7 = !{!"clang version 5.0.0 "} 111!8 = distinct !DISubprogram(name: "lea_str_loc", scope: !1, file: !1, line: 2, type: !9, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2) 112!9 = !DISubroutineType(types: !10) 113!10 = !{null, !11} 114!11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 115!13 = !DIExpression(DW_OP_deref) 116!14 = !DILocation(line: 2, column: 12, scope: !8) 117!15 = !DILocation(line: 3, column: 7, scope: !16) 118!16 = distinct !DILexicalBlock(scope: !8, file: !1, line: 3, column: 7) 119!17 = !DILocation(line: 3, column: 7, scope: !8) 120!18 = !DILocation(line: 4, column: 5, scope: !16) 121!19 = !DILocation(line: 5, column: 3, scope: !8) 122!20 = !DILocation(line: 6, column: 1, scope: !8) 123!21 = distinct !DISubprogram(name: "instr_no_loc", scope: !1, file: !1, line: 2, type: !9, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2) 124!22 = !DILocation(line: 3, column: 7, scope: !21) 125!23 = !DILocation(line: 4, column: 5, scope: !21) 126!24 = !DILocation(line: 5, column: 3, scope: !21) 127!25 = !DILocation(line: 6, column: 1, scope: !21) 128!30 = distinct !DISubprogram(name: "lea_dbg_value", scope: !1, file: !1, line: 2, type: !9, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2) 129!31 = !DILocation(line: 3, column: 7, scope: !30) 130!32 = !DILocation(line: 4, column: 5, scope: !30) 131!33 = !DILocation(line: 5, column: 3, scope: !30) 132!34 = !DILocation(line: 6, column: 1, scope: !30) 133!35 = !DILocalVariable(name: "v", scope: !30, file: !1, line: 3, type: !11) 134