94 lines · plain
1; RUN: llc -mtriple=x86_64-linux-gnu -filetype=asm %s -o - | FileCheck %s2 3; The prologue-end line record must be emitted after the last instruction that4; is part of the function frame setup code and before the instruction that marks5; the beginning of the function body.6;7; For the given test, generated from:8;9; 1 extern int get_arg();10; 2 extern void func(int x);11; 312; 4 int main()13; 5 {14; 6 int a;15; 7 func(get_arg());16; 8 }17; 918 19; The prologue-end line record is emitted with an incorrect associated address,20; which causes a debugger to show the beginning of function body to be inside21; the prologue.22 23; This can be seen in the following trimmed assembler output:24;25; main:26; ...27; # %bb.0:28; .loc 1 7 0 prologue_end29; pushq %rax30; .cfi_def_cfa_offset 1631; callq _Z7get_argv32; ...33; retq34 35; The instruction 'pushq %rax' is part of the frame setup code.36 37; The correct location for the prologue-end line information is just before38; the call to '_Z7get_argv', as illustrated in the following trimmed39; assembler output:40;41; main:42; ...43; # %bb.0:44; pushq %rax45; .cfi_def_cfa_offset 1646; .loc 1 7 0 prologue_end47; callq _Z7get_argv48; ...49; retq50 51; Check that the generated assembler matches the following sequence:52 53; CHECK: # %bb.0:54; CHECK-NEXT: pushq %rax55; CHECK-NEXT: .cfi_def_cfa_offset 1656; CHECK-NEXT: .Ltmp0:57; CHECK-NEXT: .loc 1 7 8 prologue_end {{.*}}# invalid-prologue-end.cpp:7:858; CHECK-NEXT: callq _Z7get_argv59 60define i32 @main() #0 !dbg !7 {61entry:62 %a = alloca i32, align 463 call void @llvm.dbg.declare(metadata ptr %a, metadata !11, metadata !DIExpression()), !dbg !1264 %call = call i32 @_Z7get_argv(), !dbg !1365 call void @_Z4funci(i32 %call), !dbg !1466 ret i32 0, !dbg !1567}68 69declare void @llvm.dbg.declare(metadata, metadata, metadata) #170declare void @_Z4funci(i32) #271declare i32 @_Z7get_argv() #272 73!llvm.dbg.cu = !{!0}74!llvm.module.flags = !{!3, !4, !5}75!llvm.ident = !{!6}76 77!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 7.0.0 (trunk 322269)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)78!1 = !DIFile(filename: "invalid-prologue-end.cpp", directory: "/home/carlos/llvm-root/work")79!2 = !{}80!3 = !{i32 2, !"Dwarf Version", i32 4}81!4 = !{i32 2, !"Debug Info Version", i32 3}82!5 = !{i32 1, !"wchar_size", i32 4}83!6 = !{!"clang version 7.0.0 (trunk 322269)"}84!7 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 4, type: !8, isLocal: false, isDefinition: true, scopeLine: 5, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)85!8 = !DISubroutineType(types: !9)86!9 = !{!10}87!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)88!11 = !DILocalVariable(name: "a", scope: !7, file: !1, line: 6, type: !10)89!12 = !DILocation(line: 6, column: 7, scope: !7)90!13 = !DILocation(line: 7, column: 8, scope: !7)91!14 = !DILocation(line: 7, column: 3, scope: !7)92!15 = !DILocation(line: 8, column: 1, scope: !7)93 94