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llvm-6502/test/DebugInfo/X86/fission-ranges.ll
Duncan P. N. Exon Smith b056aa798d DebugInfo: Move new hierarchy into place 
Move the specialized metadata nodes for the new debug info hierarchy
into place, finishing off PR22464.  I've done bootstraps (and all that)
and I'm confident this commit is NFC as far as DWARF output is
concerned.  Let me know if I'm wrong :).

The code changes are fairly mechanical:

  - Bumped the "Debug Info Version".
  - `DIBuilder` now creates the appropriate subclass of `MDNode`.
  - Subclasses of DIDescriptor now expect to hold their "MD"
    counterparts (e.g., `DIBasicType` expects `MDBasicType`).
  - Deleted a ton of dead code in `AsmWriter.cpp` and `DebugInfo.cpp`
    for printing comments.
  - Big update to LangRef to describe the nodes in the new hierarchy.
    Feel free to make it better.

Testcase changes are enormous.  There's an accompanying clang commit on
its way.

If you have out-of-tree debug info testcases, I just broke your build.

  - `upgrade-specialized-nodes.sh` is attached to PR22564.  I used it to
    update all the IR testcases.
  - Unfortunately I failed to find way to script the updates to CHECK
    lines, so I updated all of these by hand.  This was fairly painful,
    since the old CHECKs are difficult to reason about.  That's one of
    the benefits of the new hierarchy.

This work isn't quite finished, BTW.  The `DIDescriptor` subclasses are
almost empty wrappers, but not quite: they still have loose casting
checks (see the `RETURN_FROM_RAW()` macro).  Once they're completely
gutted, I'll rename the "MD" classes to "DI" and kill the wrappers.  I
also expect to make a few schema changes now that it's easier to reason
about everything.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231082 91177308-0d34-0410-b5e6-96231b3b80d8
2015-03-03 17:24:31 +00:00

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; RUN: llc -split-dwarf=Enable -O0 %s -mtriple=x86_64-unknown-linux-gnu -filetype=obj -o %t
; RUN: llvm-dwarfdump %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: .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]]: Beginning address index: 2
; CHECK-NEXT: Length: 190
; CHECK-NEXT: Location description: 11 00
; CHECK-NEXT: {{^$}}
; CHECK-NEXT: Beginning address index: 3
; CHECK-NEXT: Length: 23
; CHECK-NEXT: Location description: 50 93 04
; CHECK: [[E]]: Beginning address index: 4
; CHECK-NEXT: Length: 21
; CHECK-NEXT: Location description: 50 93 04
; CHECK: [[B]]: Beginning address index: 5
; CHECK-NEXT: Length: 19
; CHECK-NEXT: Location description: 50 93 04
; CHECK: [[D]]: Beginning address index: 6
; CHECK-NEXT: Length: 23
; CHECK-NEXT: Location description: 50 93 04
; 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 {
entry:
tail call fastcc void @foo(), !dbg !27
ret void, !dbg !28
}
; Function Attrs: nounwind uwtable
define internal fastcc void @foo() #0 {
entry:
tail call void @llvm.dbg.value(metadata i32 1, i64 0, metadata !13, metadata !MDExpression()), !dbg !30
tail call void @llvm.dbg.value(metadata i32 0, i64 0, metadata !14, metadata !MDExpression()), !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, i64 0, metadata !19, metadata !MDExpression()), !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, i64 0, metadata !18, metadata !MDExpression()), !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, i64 0, metadata !15, metadata !MDExpression()), !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, i64 0, metadata !16, metadata !MDExpression()), !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, i64 0, metadata !14, metadata !MDExpression()), !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, i64, 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 = !MDCompileUnit(language: DW_LANG_C99, producer: "clang version 3.4 (trunk 191700) (llvm/trunk 191710)", isOptimized: true, splitDebugFilename: "small.dwo", emissionKind: 0, file: !1, enums: !2, retainedTypes: !2, subprograms: !3, globals: !2, imports: !2)
!1 = !MDFile(filename: "small.c", directory: "/usr/local/google/home/echristo/tmp")
!2 = !{}
!3 = !{!4, !8}
!4 = !MDSubprogram(name: "bar", line: 18, isLocal: false, isDefinition: true, virtualIndex: 6, isOptimized: true, scopeLine: 19, file: !1, scope: !5, type: !6, function: void ()* @bar, variables: !2)
!5 = !MDFile(filename: "small.c", directory: "/usr/local/google/home/echristo/tmp")
!6 = !MDSubroutineType(types: !7)
!7 = !{null}
!8 = !MDSubprogram(name: "foo", line: 2, isLocal: true, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 3, file: !1, scope: !5, type: !9, function: void ()* @foo, variables: !12)
!9 = !MDSubroutineType(types: !10)
!10 = !{null, !11}
!11 = !MDBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
!12 = !{!13, !14, !15, !16, !18, !19}
!13 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "p", line: 2, arg: 1, scope: !8, file: !5, type: !11)
!14 = !MDLocalVariable(tag: DW_TAG_auto_variable, name: "a", line: 4, scope: !8, file: !5, type: !11)
!15 = !MDLocalVariable(tag: DW_TAG_auto_variable, name: "b", line: 4, scope: !8, file: !5, type: !11)
!16 = !MDLocalVariable(tag: DW_TAG_auto_variable, name: "d", line: 5, scope: !8, file: !5, type: !17)
!17 = !MDBasicType(tag: DW_TAG_base_type, name: "unsigned int", size: 32, align: 32, encoding: DW_ATE_unsigned)
!18 = !MDLocalVariable(tag: DW_TAG_auto_variable, name: "e", line: 5, scope: !8, file: !5, type: !17)
!19 = !MDLocalVariable(tag: DW_TAG_auto_variable, name: "w", line: 12, scope: !20, file: !5, type: !25)
!20 = distinct !MDLexicalBlock(line: 11, column: 0, file: !1, scope: !21)
!21 = distinct !MDLexicalBlock(line: 10, column: 0, file: !1, scope: !22)
!22 = distinct !MDLexicalBlock(line: 9, column: 0, file: !1, scope: !23)
!23 = distinct !MDLexicalBlock(line: 8, column: 0, file: !1, scope: !24)
!24 = distinct !MDLexicalBlock(line: 7, column: 0, file: !1, scope: !8)
!25 = !MDDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !11)
!26 = !{i32 2, !"Dwarf Version", i32 4}
!27 = !MDLocation(line: 20, scope: !4)
!28 = !MDLocation(line: 21, scope: !4)
!29 = !{i32 1}
!30 = !MDLocation(line: 2, scope: !8)
!31 = !MDLocation(line: 7, scope: !24)
!32 = !MDLocation(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 = !MDLocation(line: 8, scope: !23)
!38 = !MDLocation(line: 9, scope: !22)
!39 = !MDLocation(line: 10, scope: !21)
!40 = !MDLocation(line: 12, scope: !20)
!41 = !{i32* @c}
!42 = !MDLocation(line: 15, scope: !8)
!43 = !{i32 1, !"Debug Info Version", i32 3}
!44 = !{i32 0}
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