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b056aa798d
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
76 lines
3.3 KiB
LLVM
76 lines
3.3 KiB
LLVM
; Test that coverage instrumentation does not lose debug location.
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; RUN: opt < %s -sancov -sanitizer-coverage-level=2 -S | FileCheck %s
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; C++ source:
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; 1: void foo(int *a) {
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; 2: if (a)
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; 3: *a = 0;
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; 4: }
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; clang++ if.cc -O3 -g -S -emit-llvm
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; and add sanitize_address to @_Z3fooPi
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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; Check that __sanitizer_cov call has !dgb pointing to the beginning
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; of appropriate basic blocks.
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; CHECK-LABEL:_Z3fooPi
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; CHECK: call void @__sanitizer_cov(i32*{{.*}}), !dbg [[A:!.*]]
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; CHECK: call void @__sanitizer_cov(i32*{{.*}}), !dbg [[B:!.*]]
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; CHECK: call void @__sanitizer_cov(i32*{{.*}}), !dbg [[C:!.*]]
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; CHECK: ret void
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; CHECK: [[A]] = !MDLocation(line: 1, scope: !{{.*}})
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; CHECK: [[B]] = !MDLocation(line: 3, column: 5, scope: !{{.*}})
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; CHECK: [[C]] = !MDLocation(line: 4, column: 1, scope: !{{.*}})
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define void @_Z3fooPi(i32* %a) #0 {
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entry:
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tail call void @llvm.dbg.value(metadata i32* %a, i64 0, metadata !11, metadata !MDExpression()), !dbg !15
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%tobool = icmp eq i32* %a, null, !dbg !16
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br i1 %tobool, label %if.end, label %if.then, !dbg !16
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if.then: ; preds = %entry
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store i32 0, i32* %a, align 4, !dbg !18, !tbaa !19
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br label %if.end, !dbg !18
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if.end: ; preds = %entry, %if.then
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ret void, !dbg !23
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}
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #1
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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" sanitize_address}
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attributes #1 = { nounwind readnone }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!12, !13}
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!llvm.ident = !{!14}
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!0 = !MDCompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.6.0 (217079)", isOptimized: true, emissionKind: 1, file: !1, enums: !2, retainedTypes: !2, subprograms: !3, globals: !2, imports: !2)
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!1 = !MDFile(filename: "if.cc", directory: "FOO")
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!2 = !{}
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!3 = !{!4}
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!4 = !MDSubprogram(name: "foo", linkageName: "_Z3fooPi", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 1, file: !1, scope: !5, type: !6, function: void (i32*)* @_Z3fooPi, variables: !10)
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!5 = !MDFile(filename: "if.cc", directory: "FOO")
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!6 = !MDSubroutineType(types: !7)
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!7 = !{null, !8}
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!8 = !MDDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !9)
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!9 = !MDBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!10 = !{!11}
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!11 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "a", line: 1, arg: 1, scope: !4, file: !5, type: !8)
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!12 = !{i32 2, !"Dwarf Version", i32 4}
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!13 = !{i32 2, !"Debug Info Version", i32 3}
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!14 = !{!"clang version 3.6.0 (217079)"}
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!15 = !MDLocation(line: 1, column: 15, scope: !4)
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!16 = !MDLocation(line: 2, column: 7, scope: !17)
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!17 = distinct !MDLexicalBlock(line: 2, column: 7, file: !1, scope: !4)
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!18 = !MDLocation(line: 3, column: 5, scope: !17)
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!19 = !{!20, !20, i64 0}
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!20 = !{!"int", !21, i64 0}
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!21 = !{!"omnipotent char", !22, i64 0}
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!22 = !{!"Simple C/C++ TBAA"}
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!23 = !MDLocation(line: 4, column: 1, scope: !4)
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