# RUN: llc %s --start-after=livedebugvalues -filetype=obj -o - \ | |
# RUN: | llvm-dwarfdump - -name local* -regex \ | |
# RUN: | FileCheck %s | |
# | |
# Test that we produce correct DWARF from DBG_VALUE_LIST instructions. | |
# Comments and test directives inline. | |
--- | | |
target triple = "x86_64-unknown-linux-gnu" | |
define dso_local i32 @fun() local_unnamed_addr !dbg !7 { | |
entry: | |
ret i32 0 | |
} | |
!llvm.dbg.cu = !{!0} | |
!llvm.module.flags = !{!3, !4, !5} | |
!llvm.ident = !{!6} | |
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 11.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None) | |
!1 = !DIFile(filename: "example.c", directory: "/") | |
!2 = !{} | |
!3 = !{i32 7, !"Dwarf Version", i32 4} | |
!4 = !{i32 2, !"Debug Info Version", i32 3} | |
!5 = !{i32 1, !"wchar_size", i32 4} | |
!6 = !{!"clang version 11.0.0"} | |
!8 = !DISubroutineType(types: !9) | |
!9 = !{!10} | |
!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) | |
!11 = !{!12, !13, !25} | |
!22 = !DISubroutineType(types: !23) | |
!23 = !{!10, !10} | |
; --- Important metadata --- | |
!7 = distinct !DISubprogram(name: "fun", scope: !1, file: !1, line: 2, type: !8, scopeLine: 2, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11) | |
!15 = !DILocation(line: 1, column: 1, scope: !7) | |
!12 = !DILocalVariable(name: "locala", scope: !7, file: !1, line: 1, type: !10) | |
!13 = !DILocalVariable(name: "localb", scope: !7, file: !1, line: 2, type: !10) | |
!25 = !DILocalVariable(name: "localc", scope: !7, file: !1, line: 3, type: !10) | |
!26 = !DILocalVariable(name: "locald", scope: !7, file: !1, line: 4, type: !10) | |
!27 = !DILocalVariable(name: "locale", scope: !7, file: !1, line: 5, type: !10) | |
!28 = !DILocalVariable(name: "localf", scope: !7, file: !1, line: 6, type: !10) | |
!29 = !DILocalVariable(name: "localg", scope: !7, file: !1, line: 6, type: !10) | |
!30 = !DILocalVariable(name: "localh", scope: !7, file: !1, line: 6, type: !10) | |
!31 = !DILocalVariable(name: "locali", scope: !7, file: !1, line: 6, type: !10) | |
... | |
--- | |
name: fun | |
body: | | |
bb.0.entry: | |
; NOTE: By design, all DBG_VALUE_LIST instructions describe stack_value | |
; locations, so they are always created with a DW_OP_stack_value op. | |
; | |
; (1) Check a single reg arg works. | |
DBG_VALUE_LIST !12, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_stack_value), $eax, debug-location !15 | |
; CHECK: DW_TAG_variable | |
; CHECK-NEXT: (DW_OP_breg0 RAX+0, DW_OP_constu 0xffffffff, DW_OP_and, DW_OP_stack_value) | |
; CHECK-NEXT: DW_AT_name ("locala") | |
; (2) Check multiple reg args work. | |
DBG_VALUE_LIST !13, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus, DW_OP_stack_value), $eax, $edi, debug-location !15 | |
; CHECK: DW_TAG_variable | |
; CHECK-NEXT: (DW_OP_breg0 RAX+0, DW_OP_constu 0xffffffff, DW_OP_and, DW_OP_breg5 RDI+0, DW_OP_constu 0xffffffff, DW_OP_and, DW_OP_plus, DW_OP_stack_value) | |
; CHECK-NEXT: DW_AT_name ("localb") | |
; (3) Check that multiple references to one reg arg works. | |
DBG_VALUE_LIST !25, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 0, DW_OP_minus, DW_OP_stack_value), $eax, debug-location !15 | |
; CHECK: DW_TAG_variable | |
; CHECK-NEXT: (DW_OP_breg0 RAX+0, DW_OP_constu 0xffffffff, DW_OP_and, DW_OP_breg0 RAX+0, DW_OP_constu 0xffffffff, DW_OP_and, DW_OP_minus, DW_OP_stack_value) | |
; CHECK-NEXT: DW_AT_name ("localc") | |
; (4) Check constant and reg args work together. | |
DBG_VALUE_LIST !26, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_mul, DW_OP_stack_value), $eax, 5, debug-location !15 | |
; CHECK: DW_TAG_variable | |
; CHECK-NEXT: (DW_OP_breg0 RAX+0, DW_OP_constu 0xffffffff, DW_OP_and, DW_OP_lit5, DW_OP_mul, DW_OP_stack_value) | |
; CHECK-NEXT: DW_AT_name ("locald") | |
; (5) Check that arg deref works. | |
DBG_VALUE_LIST !27, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_deref, DW_OP_stack_value), $eax, debug-location !15 | |
; CHECK: DW_TAG_variable | |
; CHECK-NEXT: (DW_OP_breg0 RAX+0, DW_OP_constu 0xffffffff, DW_OP_and, DW_OP_deref, DW_OP_stack_value) | |
; CHECK-NEXT: DW_AT_name ("locale") | |
; (6) Check that fragments work. | |
DBG_VALUE_LIST !28, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_stack_value, DW_OP_LLVM_fragment, 0, 16), $eax, debug-location !15 | |
; CHECK: DW_TAG_variable | |
; CHECK-NEXT: (DW_OP_breg0 RAX+0, DW_OP_constu 0xffffffff, DW_OP_and, DW_OP_stack_value, DW_OP_piece 0x2) | |
; CHECK-NEXT: DW_AT_name ("localf") | |
; (7) Check that constant register offsets are correctly folded. | |
DBG_VALUE_LIST !29, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_plus_uconst, 5, DW_OP_LLVM_arg, 1, DW_OP_plus_uconst, 17, DW_OP_plus, DW_OP_stack_value), $eax, $edi, debug-location !15 | |
; CHECK: DW_TAG_variable | |
; CHECK-NEXT: (DW_OP_breg0 RAX+5, DW_OP_constu 0xffffffff, DW_OP_and, DW_OP_breg5 RDI+17, DW_OP_constu 0xffffffff, DW_OP_and, DW_OP_plus, DW_OP_stack_value) | |
; CHECK-NEXT: DW_AT_name ("localg") | |
; (8) Check that a single $noreg location invalidates the entire entry. | |
DBG_VALUE_LIST !30, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus, DW_OP_stack_value), $eax, $noreg, debug-location !15 | |
; CHECK-NOT: DW_AT_name ("localh") | |
; (9) Check that relational operators work | |
DBG_VALUE_LIST !31, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_eq, DW_OP_LLVM_arg, 0, DW_OP_ne, DW_OP_LLVM_arg, 1, DW_OP_gt, DW_OP_LLVM_arg, 0, DW_OP_lt, DW_OP_LLVM_arg, 1, DW_OP_le, DW_OP_stack_value), $eax, $edi, debug-location !15 | |
; CHECK: DW_TAG_variable | |
; CHECK-NEXT: (DW_OP_breg0 RAX+0, DW_OP_constu 0xffffffff, DW_OP_and, DW_OP_breg5 RDI+0, DW_OP_constu 0xffffffff, DW_OP_and, DW_OP_eq, DW_OP_breg0 RAX+0, DW_OP_constu 0xffffffff, DW_OP_and, DW_OP_ne, DW_OP_breg5 RDI+0, DW_OP_constu 0xffffffff, DW_OP_and, DW_OP_gt, DW_OP_breg0 RAX+0, DW_OP_constu 0xffffffff, DW_OP_and, DW_OP_lt, DW_OP_breg5 RDI+0, DW_OP_constu 0xffffffff, DW_OP_and, DW_OP_le, DW_OP_stack_value) | |
; CHECK-NEXT: DW_AT_name ("locali") | |
RET64 debug-location !15 | |
... |