| ; RUN: llc -mtriple=x86_64-linux-gnu -filetype=asm %s -o - | FileCheck %s |
| |
| ; The prologue-end line record must be emitted after the last instruction that |
| ; is part of the function frame setup code and before the instruction that marks |
| ; the beginning of the function body. |
| ; |
| ; For the given test, generated from: |
| ; |
| ; 1 extern int get_arg(); |
| ; 2 extern void func(int x); |
| ; 3 |
| ; 4 int main() |
| ; 5 { |
| ; 6 int a; |
| ; 7 func(get_arg()); |
| ; 8 } |
| ; 9 |
| |
| ; The prologue-end line record is emitted with an incorrect associated address, |
| ; which causes a debugger to show the beginning of function body to be inside |
| ; the prologue. |
| |
| ; This can be seen in the following trimmed assembler output: |
| ; |
| ; main: |
| ; ... |
| ; # %bb.0: |
| ; .loc 1 7 0 prologue_end |
| ; pushq %rax |
| ; .cfi_def_cfa_offset 16 |
| ; callq _Z7get_argv |
| ; ... |
| ; retq |
| |
| ; The instruction 'pushq %rax' is part of the frame setup code. |
| |
| ; The correct location for the prologue-end line information is just before |
| ; the call to '_Z7get_argv', as illustrated in the following trimmed |
| ; assembler output: |
| ; |
| ; main: |
| ; ... |
| ; # %bb.0: |
| ; pushq %rax |
| ; .cfi_def_cfa_offset 16 |
| ; .loc 1 7 0 prologue_end |
| ; callq _Z7get_argv |
| ; ... |
| ; retq |
| |
| ; Check that the generated assembler matches the following sequence: |
| |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: pushq %rax |
| ; CHECK-NEXT: .cfi_def_cfa_offset 16 |
| ; CHECK-NEXT: .Ltmp0: |
| ; CHECK-NEXT: .loc 1 7 8 prologue_end {{.*}}# invalid-prologue-end.cpp:7:8 |
| ; CHECK-NEXT: callq _Z7get_argv |
| |
| define i32 @main() #0 !dbg !7 { |
| entry: |
| %a = alloca i32, align 4 |
| call void @llvm.dbg.declare(metadata ptr %a, metadata !11, metadata !DIExpression()), !dbg !12 |
| %call = call i32 @_Z7get_argv(), !dbg !13 |
| call void @_Z4funci(i32 %call), !dbg !14 |
| ret i32 0, !dbg !15 |
| } |
| |
| declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 |
| declare void @_Z4funci(i32) #2 |
| declare i32 @_Z7get_argv() #2 |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.module.flags = !{!3, !4, !5} |
| !llvm.ident = !{!6} |
| |
| !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) |
| !1 = !DIFile(filename: "invalid-prologue-end.cpp", directory: "/home/carlos/llvm-root/work") |
| !2 = !{} |
| !3 = !{i32 2, !"Dwarf Version", i32 4} |
| !4 = !{i32 2, !"Debug Info Version", i32 3} |
| !5 = !{i32 1, !"wchar_size", i32 4} |
| !6 = !{!"clang version 7.0.0 (trunk 322269)"} |
| !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) |
| !8 = !DISubroutineType(types: !9) |
| !9 = !{!10} |
| !10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) |
| !11 = !DILocalVariable(name: "a", scope: !7, file: !1, line: 6, type: !10) |
| !12 = !DILocation(line: 6, column: 7, scope: !7) |
| !13 = !DILocation(line: 7, column: 8, scope: !7) |
| !14 = !DILocation(line: 7, column: 3, scope: !7) |
| !15 = !DILocation(line: 8, column: 1, scope: !7) |
| |