xref: /llvm-project/llvm/test/DebugInfo/X86/basic-block-sections-debug-loclist-5.ll (revision 391f323690b9ef84d13a09ff07fb805008401fee)

; RUN: llc %s -mtriple=x86_64-unknown-linux-gnu --dwarf-version=4 --basic-block-sections=none -filetype=obj -o - -experimental-debug-variable-locations=true | llvm-dwarfdump - | FileCheck %s
; RUN: llc %s -mtriple=x86_64-unknown-linux-gnu --dwarf-version=4 --basic-block-sections=all -filetype=obj -o - -experimental-debug-variable-locations=true | llvm-dwarfdump - | FileCheck %s --check-prefix=CHECK --check-prefix=SECTIONS
; RUN: llc %s -mtriple=x86_64-unknown-linux-gnu --dwarf-version=5 --basic-block-sections=none -filetype=obj -o - -experimental-debug-variable-locations=true | llvm-dwarfdump - | FileCheck %s
; RUN: llc %s -mtriple=x86_64-unknown-linux-gnu --dwarf-version=5 --basic-block-sections=all -filetype=obj -o - -experimental-debug-variable-locations=true | llvm-dwarfdump - | FileCheck %s --check-prefix=CHECK --check-prefix=SECTIONS

; CHECK:      DW_TAG_variable
; CHECK-NEXT: DW_AT_location
; CHECK-NEXT: [0x{{[0-9a-f]+}}, 0x{{[0-9a-f]+}}): DW_OP_consts +7, DW_OP_stack_value
; SECTIONS-NEXT: [0x{{[0-9a-f]+}}, 0x{{[0-9a-f]+}}): DW_OP_consts +7, DW_OP_stack_value
; SECTIONS-NEXT: [0x{{[0-9a-f]+}}, 0x{{[0-9a-f]+}}): DW_OP_consts +7, DW_OP_stack_value
; CHECK-NEXT: [0x{{[0-9a-f]+}}, 0x{{[0-9a-f]+}}): DW_OP_reg0 RAX)
; CHECK-NEXT: DW_AT_name	("i")

; In the test below, i's constant value of 7 is only valid partially as
; it is redefined at the end.  This forces the use of a loclist with basic
; block sections.  Without basic block sections, a single entry location
; list would be used to mark the entire scope in which value of i is 7.

; Source to generate the IR below:

; void f1();
; int f2();
; extern bool b;
; extern int x;
; void test() {
;   int i = 7;
;   f1();
;   if (b)
;     f1();
;   i = f2();
;   f1();
; }
;
; $ clang++ -S -emit-llvm -g -O2 loclist_4.cc


@b = external dso_local local_unnamed_addr global i8, align 1

define dso_local void @_Z4testv() local_unnamed_addr !dbg !7 {
entry:
  call void @llvm.dbg.value(metadata i32 7, metadata !11, metadata !DIExpression()), !dbg !13
  tail call void @_Z2f1v(), !dbg !14
  %0 = load i8, ptr @b, align 1, !dbg !15, !tbaa !17, !range !21
  %tobool.not = icmp eq i8 %0, 0, !dbg !15
  br i1 %tobool.not, label %if.end, label %if.then, !dbg !22

if.then:                                          ; preds = %entry
  tail call void @_Z2f1v(), !dbg !23
  br label %if.end, !dbg !23

if.end:                                           ; preds = %if.then, %entry
  %call = tail call i32 @_Z2f2v(), !dbg !24
  call void @llvm.dbg.value(metadata i32 %call, metadata !11, metadata !DIExpression()), !dbg !13
  tail call void @_Z2f1v(), !dbg !25
  ret void, !dbg !26
}

declare !dbg !27 dso_local void @_Z2f1v() local_unnamed_addr

declare !dbg !28 dso_local i32 @_Z2f2v() local_unnamed_addr

; Function Attrs: nofree nosync nounwind readnone speculatable willreturn
declare void @llvm.dbg.value(metadata, metadata, metadata)

!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4, !5}
!llvm.ident = !{!6}

!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 13.0.0 (git@github.com:llvm/llvm-project.git 593cb4655097552ac6d81ce18a2851ae0feb8d3c)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
!1 = !DIFile(filename: "loclist_5.cc", directory: "/code")
!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 13.0.0 (git@github.com:llvm/llvm-project.git 593cb4655097552ac6d81ce18a2851ae0feb8d3c)"}
!7 = distinct !DISubprogram(name: "test", linkageName: "_Z4testv", scope: !1, file: !1, line: 5, type: !8, scopeLine: 5, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !10)
!8 = !DISubroutineType(types: !9)
!9 = !{null}
!10 = !{!11}
!11 = !DILocalVariable(name: "i", scope: !7, file: !1, line: 9, type: !12)
!12 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!13 = !DILocation(line: 0, scope: !7)
!14 = !DILocation(line: 10, column: 3, scope: !7)
!15 = !DILocation(line: 11, column: 7, scope: !16)
!16 = distinct !DILexicalBlock(scope: !7, file: !1, line: 11, column: 7)
!17 = !{!18, !18, i64 0}
!18 = !{!"bool", !19, i64 0}
!19 = !{!"omnipotent char", !20, i64 0}
!20 = !{!"Simple C++ TBAA"}
!21 = !{i8 0, i8 2}
!22 = !DILocation(line: 11, column: 7, scope: !7)
!23 = !DILocation(line: 12, column: 5, scope: !16)
!24 = !DILocation(line: 13, column: 7, scope: !7)
!25 = !DILocation(line: 14, column: 3, scope: !7)
!26 = !DILocation(line: 15, column: 1, scope: !7)
!27 = !DISubprogram(name: "f1", linkageName: "_Z2f1v", scope: !1, file: !1, line: 1, type: !8, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2)
!28 = !DISubprogram(name: "f2", linkageName: "_Z2f2v", scope: !1, file: !1, line: 2, type: !29, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2)
!29 = !DISubroutineType(types: !30)
!30 = !{!12}