# RUN: llc %s --start-after=livedebugvalues -filetype=obj -o - \
# RUN: | llvm-dwarfdump - -name local* -regex \
# RUN: | FileCheck %s
#
## This tests certain single location detection functionality. The Test MIR
## is hand written. Test directives and comments 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, splitDebugInlining: false, nameTableKind: None)
!1 = !DIFile(filename: "example.c", directory: "/")
!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)
!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)
!24 = distinct !DILexicalBlock(scope: !7, file: !1, line: 9, column: 3)
!14 = distinct !DILexicalBlock(scope: !7, file: !1, line: 4, column: 3)
!12 = !DILocalVariable(name: "locala", scope: !7, file: !1, line: 1, type: !10)
!13 = !DILocalVariable(name: "localb", scope: !14, file: !1, line: 2, type: !10)
!25 = !DILocalVariable(name: "localc", scope: !24, file: !1, line: 3, type: !10)
!27 = !DILocalVariable(name: "tmp", scope: !14, file: !1, line: 2, type: !10)
!15 = !DILocation(line: 1, column: 0, scope: !7)
!18 = !DILocation(line: 2, column: 1, scope: !14)
!26 = !DILocation(line: 3, column: 1, scope: !24)
...
---
name: fun
body: |
bb.0.entry:
;; This is the scope and variable structure:
;; int fun() { // scope fun !7
;; int locala; // scope fun !7, var locala !12, debug-location !15
;; { int localb; // scope fun:block !14, var localb !13, debug-location !18
;; int tmp; } // scope fun:block !14, var localb !27, debug-location !18
;; { int localc; } // scope fun:block !24, var localc !25, debug-location !26
;; }
;;
;; (1) Check that frame-setup instructions are not counted against
;; locations being valid throughout the function call.
;
; CHECK: DW_TAG_variable
; CHECK-NEXT: DW_AT_location (DW_OP_reg5 RDI)
; CHECK-NEXT: DW_AT_name ("locala")
$rbp = frame-setup MOV64rr $rsp
DBG_VALUE $edi, $noreg, !12, !DIExpression(), debug-location !15
$eax = MOV32ri 0, debug-location !15
;; (2) The scope block ends with a meta instruction. A location range ends
;; with the final non-meta instruction in the scope. Check that
;; location is considered valid throughout.
;
; CHECK: DW_TAG_variable
; CHECK-NEXT: DW_AT_location (DW_OP_reg2 RCX)
; CHECK-NEXT: DW_AT_name ("localb")
;
;; start scope, start location range
DBG_VALUE $ecx, $noreg, !13, !DIExpression(), debug-location !18
;; end location range
$ecx = MOV32ri 1, debug-location !18
;; end scope
DBG_VALUE $noreg, $noreg, !27, !DIExpression(), debug-location !18
;; (3) The final instruction in the scope closes a location range. Check
;; that location is considered valid throughout.
;
; CHECK: DW_TAG_variable
; CHECK-NEXT: DW_AT_location (DW_OP_reg4 RSI)
; CHECK-NEXT: DW_AT_name ("localc")
;
;; start scope, start location range
DBG_VALUE $esi, $noreg, !25, !DIExpression(), debug-location !26
;; end scope, end location range
$esi = MOV32ri 2, debug-location !26
RET64 debug-location !15
...
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