1; RUN: llc -O0 < %s | FileCheck %s 2; RUN: llc --try-experimental-debuginfo-iterators -O0 < %s | FileCheck %s 3 4source_filename = "t.c" 5target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32" 6target triple = "i386-pc-windows-msvc19.0.24215" 7 8@str_const = internal unnamed_addr constant [4 x i8] c"str\00", align 1 9 10declare i32 @puts(ptr) 11declare void @use_i32(ptr) 12declare void @llvm.dbg.value(metadata, metadata, metadata) nounwind readnone 13 14; We had a line info quality issue where the LEA for the string constant had no 15; location info, so the .cv_loc directive appeared after it. Now we have logic 16; that tries to emit the first valid location to the top of each MBB. 17 18define void @lea_str_loc(i1 %cond) !dbg !8 { 19entry: 20 br i1 %cond, label %if.then, label %if.end, !dbg !17 21 22if.then: ; preds = %entry 23 br label %return, !dbg !18 24 25if.end: ; preds = %entry 26 %call = call i32 @puts(ptr @str_const), !dbg !19 27 br label %return, !dbg !20 28 29return: ; preds = %if.end, %if.then 30 ret void, !dbg !20 31} 32 33; The t.c:5 line marker should appear immediately after the BB label. 34 35; CHECK-LABEL: _lea_str_loc: 36; CHECK: .cv_loc {{.*}} # t.c:4:5 37; CHECK: jmp LBB{{.*}} 38; CHECK: LBB0_{{.*}}: # %if.end 39; CHECK-NEXT: .cv_loc {{.*}} # t.c:5:3 40; CHECK-NEXT: leal _str_const, %[[reg:[^ ]*]] 41; CHECK-NEXT: movl %[[reg]], (%esp) 42; CHECK-NEXT: calll _puts 43 44define void @instr_no_loc(i1 %cond) !dbg !21 { 45entry: 46 br i1 %cond, label %if.then, label %if.end, !dbg !22 47 48if.then: ; preds = %entry 49 br label %return, !dbg !23 50 51if.end: ; preds = %entry 52 call void asm sideeffect "nop", ""() 53 %call = call i32 @puts(ptr @str_const), !dbg !24 54 br label %return, !dbg !25 55 56return: ; preds = %if.end, %if.then 57 ret void, !dbg !25 58} 59 60; CHECK-LABEL: _instr_no_loc: 61; CHECK: .cv_loc {{.*}} # t.c:4:5 62; CHECK: jmp LBB{{.*}} 63; CHECK: LBB1_{{.*}}: # %if.end 64; CHECK-NEXT: .cv_loc {{.*}} # t.c:5:3 65; CHECK-NEXT: #APP 66; CHECK-NEXT: nop 67; CHECK-NEXT: #NO_APP 68; CHECK-NEXT: leal _str_const, %[[reg:[^ ]*]] 69; CHECK-NEXT: movl %[[reg]], (%esp) 70; CHECK-NEXT: calll _puts 71 72define void @lea_dbg_value(i1 %cond) !dbg !30 { 73entry: 74 %value = alloca i32 75 store i32 42, ptr %value 76 br i1 %cond, label %if.then, label %if.end, !dbg !31 77 78if.then: ; preds = %entry 79 br label %return, !dbg !32 80 81if.end: ; preds = %entry 82 call void @llvm.dbg.value(metadata ptr %value, metadata !35, metadata !13), !dbg !34 83 call void @use_i32(ptr %value), !dbg !33 84 br label %return, !dbg !34 85 86return: ; preds = %if.end, %if.then 87 ret void, !dbg !34 88} 89 90; CHECK-LABEL: _lea_dbg_value: 91; CHECK: .cv_loc {{.*}} # t.c:4:5 92; CHECK: jmp LBB{{.*}} 93; CHECK: LBB2_{{.*}}: # %if.end 94; CHECK-NEXT: L{{.*}}: 95; CHECK-NEXT: DEBUG_VALUE: lea_dbg_value: 96; CHECK-NEXT: .cv_loc {{.*}} # t.c:5:3 97; CHECK: leal 4(%esp), %[[reg:[^ ]*]] 98; CHECK: movl %[[reg]], (%esp) 99; CHECK: calll _use_i32 100 101!llvm.dbg.cu = !{!0} 102!llvm.module.flags = !{!3, !4, !5, !6} 103!llvm.ident = !{!7} 104 105!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 5.0.0 ", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2) 106!1 = !DIFile(filename: "t.c", directory: "C:\5Csrc\5Cllvm-project\5Cbuild", checksumkind: CSK_MD5, checksum: "b32df088e991f1996b4e4deb3855c14b") 107!2 = !{} 108!3 = !{i32 1, !"NumRegisterParameters", i32 0} 109!4 = !{i32 2, !"CodeView", i32 1} 110!5 = !{i32 2, !"Debug Info Version", i32 3} 111!6 = !{i32 1, !"wchar_size", i32 2} 112!7 = !{!"clang version 5.0.0 "} 113!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) 114!9 = !DISubroutineType(types: !10) 115!10 = !{null, !11} 116!11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 117!13 = !DIExpression(DW_OP_deref) 118!14 = !DILocation(line: 2, column: 12, scope: !8) 119!15 = !DILocation(line: 3, column: 7, scope: !16) 120!16 = distinct !DILexicalBlock(scope: !8, file: !1, line: 3, column: 7) 121!17 = !DILocation(line: 3, column: 7, scope: !8) 122!18 = !DILocation(line: 4, column: 5, scope: !16) 123!19 = !DILocation(line: 5, column: 3, scope: !8) 124!20 = !DILocation(line: 6, column: 1, scope: !8) 125!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) 126!22 = !DILocation(line: 3, column: 7, scope: !21) 127!23 = !DILocation(line: 4, column: 5, scope: !21) 128!24 = !DILocation(line: 5, column: 3, scope: !21) 129!25 = !DILocation(line: 6, column: 1, scope: !21) 130!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) 131!31 = !DILocation(line: 3, column: 7, scope: !30) 132!32 = !DILocation(line: 4, column: 5, scope: !30) 133!33 = !DILocation(line: 5, column: 3, scope: !30) 134!34 = !DILocation(line: 6, column: 1, scope: !30) 135!35 = !DILocalVariable(name: "v", scope: !30, file: !1, line: 3, type: !11) 136