RPCS3/llvm-mirror
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm-mirror.git synced 2025-01-31 12:41:49 +01:00
Code Issues Projects Releases Wiki Activity
llvm-mirror/test/DebugInfo/X86/fission-ranges.ll
Shiva Chen a2029fa58e [DebugInfo] Add DILabel metadata and intrinsic llvm.dbg.label. 
In order to set breakpoints on labels and list source code around
labels, we need collect debug information for labels, i.e., label
name, the function label belong, line number in the file, and the
address label located. In order to keep these information in LLVM
IR and to allow backend to generate debug information correctly.
We create a new kind of metadata for labels, DILabel. The format
of DILabel is

!DILabel(scope: !1, name: "foo", file: !2, line: 3)

We hope to keep debug information as much as possible even the
code is optimized. So, we create a new kind of intrinsic for label
metadata to avoid the metadata is eliminated with basic block.
The intrinsic will keep existing if we keep it from optimized out.
The format of the intrinsic is

llvm.dbg.label(metadata !1)

It has only one argument, that is the DILabel metadata. The
intrinsic will follow the label immediately. Backend could get the
label metadata through the intrinsic's parameter.

We also create DIBuilder API for labels to be used by Frontend.
Frontend could use createLabel() to allocate DILabel objects, and use
insertLabel() to insert llvm.dbg.label intrinsic in LLVM IR.

Differential Revision: https://reviews.llvm.org/D45024

Patch by Hsiangkai Wang.

llvm-svn: 331841
2018-05-09 02:40:45 +00:00

194 lines
8.5 KiB
LLVM
Raw Blame History

; RUN: llc -split-dwarf-file=foo.dwo -O0 %s -mtriple=x86_64-unknown-linux-gnu -filetype=obj -o %t
; RUN: llvm-dwarfdump -v %t | FileCheck %s
; RUN: llvm-objdump -h %t | FileCheck --check-prefix=HDR %s
; CHECK: .debug_info contents:
; CHECK: DW_TAG_compile_unit
; CHECK-NEXT: DW_AT_stmt_list
; CHECK-NEXT: DW_AT_GNU_dwo_name
; CHECK-NEXT: DW_AT_comp_dir
; CHECK-NEXT: DW_AT_GNU_dwo_id
; CHECK-NEXT: DW_AT_GNU_addr_base [DW_FORM_sec_offset] (0x00000000)
; CHECK: .debug_info.dwo contents:
; CHECK: DW_AT_location [DW_FORM_sec_offset] ([[A:0x[0-9a-z]*]]
; CHECK: DW_AT_location [DW_FORM_sec_offset] ([[E:0x[0-9a-z]*]]
; CHECK: DW_AT_location [DW_FORM_sec_offset] ([[B:0x[0-9a-z]*]]
; CHECK: DW_AT_location [DW_FORM_sec_offset] ([[D:0x[0-9a-z]*]]
; CHECK: DW_AT_ranges [DW_FORM_sec_offset] (0x00000000
; CHECK-NOT: .debug_loc contents:
; CHECK-NOT: Beginning address offset
; CHECK: .debug_loc.dwo contents:
; Don't assume these locations are entirely correct - feel free to update them
; if they've changed due to a bugfix, change in register allocation, etc.
; CHECK: [[A]]:
; CHECK-NEXT: Addr idx 2 (w/ length 169): DW_OP_consts +0, DW_OP_stack_value
; CHECK-NEXT: Addr idx 3 (w/ length 25): DW_OP_reg0 RAX
; CHECK: [[E]]:
; CHECK-NEXT: Addr idx 4 (w/ length 19): DW_OP_reg0 RAX
; CHECK: [[B]]:
; CHECK-NEXT: Addr idx 5 (w/ length 17): DW_OP_reg0 RAX
; CHECK: [[D]]:
; CHECK-NEXT: Addr idx 6 (w/ length 17): DW_OP_reg0 RAX
; Make sure we don't produce any relocations in any .dwo section (though in particular, debug_info.dwo)
; HDR-NOT: .rela.{{.*}}.dwo
; Make sure we have enough stuff in the debug_addr to cover the address indexes
; (6 is the last index in debug_loc.dwo, making 7 entries of 8 bytes each, 7 * 8
; == 56 base 10 == 38 base 16)
; HDR: .debug_addr 00000038
; HDR-NOT: .rela.{{.*}}.dwo
; From the code:
; extern int c;
; static void foo (int p)
; {
; int a, b;
; unsigned int d, e;
; for (a = 0; a < 30; a++)
; for (d = 0; d < 30; d++)
; for (b = 0; b < 30; b++)
; for (e = 0; e < 30; e++)
; {
; int *w = &c;
; *w &= p;
; }
; }
; void
; bar ()
; {
; foo (1);
; }
; compiled with:
; clang -g -S -gsplit-dwarf -O1 small.c
@c = external global i32
; Function Attrs: nounwind uwtable
define void @bar() #0 !dbg !4 {
entry:
tail call fastcc void @foo(), !dbg !27
ret void, !dbg !28
}
; Function Attrs: nounwind uwtable
define internal fastcc void @foo() #0 !dbg !8 {
entry:
tail call void @llvm.dbg.value(metadata i32 1, metadata !13, metadata !DIExpression()), !dbg !30
tail call void @llvm.dbg.value(metadata i32 0, metadata !14, metadata !DIExpression()), !dbg !31
%c.promoted9 = load i32, i32* @c, align 4, !dbg !32, !tbaa !33
br label %for.cond1.preheader, !dbg !31
for.cond1.preheader: ; preds = %for.inc16, %entry
%and.lcssa.lcssa.lcssa10 = phi i32 [ %c.promoted9, %entry ], [ %and, %for.inc16 ]
%a.08 = phi i32 [ 0, %entry ], [ %inc17, %for.inc16 ]
br label %for.cond4.preheader, !dbg !37
for.cond4.preheader: ; preds = %for.inc13, %for.cond1.preheader
%and.lcssa.lcssa7 = phi i32 [ %and.lcssa.lcssa.lcssa10, %for.cond1.preheader ], [ %and, %for.inc13 ]
%d.06 = phi i32 [ 0, %for.cond1.preheader ], [ %inc14, %for.inc13 ]
br label %for.cond7.preheader, !dbg !38
for.cond7.preheader: ; preds = %for.inc10, %for.cond4.preheader
%and.lcssa5 = phi i32 [ %and.lcssa.lcssa7, %for.cond4.preheader ], [ %and, %for.inc10 ]
%b.03 = phi i32 [ 0, %for.cond4.preheader ], [ %inc11, %for.inc10 ]
br label %for.body9, !dbg !39
for.body9: ; preds = %for.body9, %for.cond7.preheader
%and2 = phi i32 [ %and.lcssa5, %for.cond7.preheader ], [ %and, %for.body9 ], !dbg !40
%e.01 = phi i32 [ 0, %for.cond7.preheader ], [ %inc, %for.body9 ]
tail call void @llvm.dbg.value(metadata i32* @c, metadata !19, metadata !DIExpression()), !dbg !40
%and = and i32 %and2, 1, !dbg !32
%inc = add i32 %e.01, 1, !dbg !39
tail call void @llvm.dbg.value(metadata i32 %inc, metadata !18, metadata !DIExpression()), !dbg !39
%exitcond = icmp eq i32 %inc, 30, !dbg !39
br i1 %exitcond, label %for.inc10, label %for.body9, !dbg !39
for.inc10: ; preds = %for.body9
%inc11 = add nsw i32 %b.03, 1, !dbg !38
tail call void @llvm.dbg.value(metadata i32 %inc11, metadata !15, metadata !DIExpression()), !dbg !38
%exitcond11 = icmp eq i32 %inc11, 30, !dbg !38
br i1 %exitcond11, label %for.inc13, label %for.cond7.preheader, !dbg !38
for.inc13: ; preds = %for.inc10
%inc14 = add i32 %d.06, 1, !dbg !37
tail call void @llvm.dbg.value(metadata i32 %inc14, metadata !16, metadata !DIExpression()), !dbg !37
%exitcond12 = icmp eq i32 %inc14, 30, !dbg !37
br i1 %exitcond12, label %for.inc16, label %for.cond4.preheader, !dbg !37
for.inc16: ; preds = %for.inc13
%inc17 = add nsw i32 %a.08, 1, !dbg !31
tail call void @llvm.dbg.value(metadata i32 %inc17, metadata !14, metadata !DIExpression()), !dbg !31
%exitcond13 = icmp eq i32 %inc17, 30, !dbg !31
br i1 %exitcond13, label %for.end18, label %for.cond1.preheader, !dbg !31
for.end18: ; preds = %for.inc16
store i32 %and, i32* @c, align 4, !dbg !32, !tbaa !33
ret void, !dbg !42
}
; Function Attrs: nounwind readnone
declare void @llvm.dbg.value(metadata, metadata, metadata) #1
attributes #0 = { nounwind uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { nounwind readnone }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!26, !43}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.4 (trunk 191700) (llvm/trunk 191710)", isOptimized: true, splitDebugFilename: "small.dwo", emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !2, globals: !2, imports: !2)
!1 = !DIFile(filename: "small.c", directory: "/usr/local/google/home/echristo/tmp")
!2 = !{}
!4 = distinct !DISubprogram(name: "bar", line: 18, isLocal: false, isDefinition: true, virtualIndex: 6, isOptimized: true, unit: !0, scopeLine: 19, file: !1, scope: !5, type: !6, retainedNodes: !2)
!5 = !DIFile(filename: "small.c", directory: "/usr/local/google/home/echristo/tmp")
!6 = !DISubroutineType(types: !7)
!7 = !{null}
!8 = distinct !DISubprogram(name: "foo", line: 2, isLocal: true, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, scopeLine: 3, file: !1, scope: !5, type: !9, retainedNodes: !12)
!9 = !DISubroutineType(types: !10)
!10 = !{null, !11}
!11 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
!12 = !{!13, !14, !15, !16, !18, !19}
!13 = !DILocalVariable(name: "p", line: 2, arg: 1, scope: !8, file: !5, type: !11)
!14 = !DILocalVariable(name: "a", line: 4, scope: !8, file: !5, type: !11)
!15 = !DILocalVariable(name: "b", line: 4, scope: !8, file: !5, type: !11)
!16 = !DILocalVariable(name: "d", line: 5, scope: !8, file: !5, type: !17)
!17 = !DIBasicType(tag: DW_TAG_base_type, name: "unsigned int", size: 32, align: 32, encoding: DW_ATE_unsigned)
!18 = !DILocalVariable(name: "e", line: 5, scope: !8, file: !5, type: !17)
!19 = !DILocalVariable(name: "w", line: 12, scope: !20, file: !5, type: !25)
!20 = distinct !DILexicalBlock(line: 11, column: 0, file: !1, scope: !21)
!21 = distinct !DILexicalBlock(line: 10, column: 0, file: !1, scope: !22)
!22 = distinct !DILexicalBlock(line: 9, column: 0, file: !1, scope: !23)
!23 = distinct !DILexicalBlock(line: 8, column: 0, file: !1, scope: !24)
!24 = distinct !DILexicalBlock(line: 7, column: 0, file: !1, scope: !8)
!25 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !11)
!26 = !{i32 2, !"Dwarf Version", i32 4}
!27 = !DILocation(line: 20, scope: !4)
!28 = !DILocation(line: 21, scope: !4)
!29 = !{i32 1}
!30 = !DILocation(line: 2, scope: !8)
!31 = !DILocation(line: 7, scope: !24)
!32 = !DILocation(line: 13, scope: !20)
!33 = !{!34, !34, i64 0}
!34 = !{!"int", !35, i64 0}
!35 = !{!"omnipotent char", !36, i64 0}
!36 = !{!"Simple C/C++ TBAA"}
!37 = !DILocation(line: 8, scope: !23)
!38 = !DILocation(line: 9, scope: !22)
!39 = !DILocation(line: 10, scope: !21)
!40 = !DILocation(line: 12, scope: !20)
!41 = !{i32* @c}
!42 = !DILocation(line: 15, scope: !8)
!43 = !{i32 1, !"Debug Info Version", i32 3}
!44 = !{i32 0}
Reference in New Issue View Git Blame Copy Permalink