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8d1b74869c
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.
llvm-svn: 231082
88 lines
5.0 KiB
LLVM
88 lines
5.0 KiB
LLVM
; RUN: opt -S -asan %s | FileCheck %s
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; The IR of this testcase is generated from the following C code:
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; void bar (int);
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;
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; void foo() {
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; __block int x;
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; bar(x);
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; }
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; by compiling it with 'clang -emit-llvm -g -S' and then by manually
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; adding the sanitize_address attribute to the @foo() function (so
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; that ASAN accepts to instrument the function in the above opt run).
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; Check that the location of the ASAN instrumented __block variable is
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; correct.
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; CHECK: !MDExpression(DW_OP_deref, DW_OP_plus, 8, DW_OP_deref, DW_OP_plus, 24)
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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%struct.__block_byref_x = type { i8*, %struct.__block_byref_x*, i32, i32, i32 }
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; Function Attrs: nounwind ssp uwtable
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define void @foo() #0 {
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entry:
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%x = alloca %struct.__block_byref_x, align 8
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call void @llvm.dbg.declare(metadata %struct.__block_byref_x* %x, metadata !12, metadata !22), !dbg !23
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%byref.isa = getelementptr inbounds %struct.__block_byref_x, %struct.__block_byref_x* %x, i32 0, i32 0, !dbg !24
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store i8* null, i8** %byref.isa, !dbg !24
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%byref.forwarding = getelementptr inbounds %struct.__block_byref_x, %struct.__block_byref_x* %x, i32 0, i32 1, !dbg !24
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store %struct.__block_byref_x* %x, %struct.__block_byref_x** %byref.forwarding, !dbg !24
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%byref.flags = getelementptr inbounds %struct.__block_byref_x, %struct.__block_byref_x* %x, i32 0, i32 2, !dbg !24
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store i32 0, i32* %byref.flags, !dbg !24
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%byref.size = getelementptr inbounds %struct.__block_byref_x, %struct.__block_byref_x* %x, i32 0, i32 3, !dbg !24
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store i32 32, i32* %byref.size, !dbg !24
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%forwarding = getelementptr inbounds %struct.__block_byref_x, %struct.__block_byref_x* %x, i32 0, i32 1, !dbg !25
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%0 = load %struct.__block_byref_x*, %struct.__block_byref_x** %forwarding, !dbg !25
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%x1 = getelementptr inbounds %struct.__block_byref_x, %struct.__block_byref_x* %0, i32 0, i32 4, !dbg !25
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%1 = load i32, i32* %x1, align 4, !dbg !25
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call void @bar(i32 %1), !dbg !25
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%2 = bitcast %struct.__block_byref_x* %x to i8*, !dbg !26
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call void @_Block_object_dispose(i8* %2, i32 8) #3, !dbg !26
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ret void, !dbg !26
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}
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
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declare void @bar(i32) #2
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declare void @_Block_object_dispose(i8*, i32)
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attributes #0 = { nounwind ssp uwtable sanitize_address "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #1 = { nounwind readnone }
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attributes #2 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #3 = { nounwind }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!8, !9, !10}
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!llvm.ident = !{!11}
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!0 = !MDCompileUnit(language: DW_LANG_C99, producer: "clang version 3.6.0 (trunk 223120) (llvm/trunk 223119)", isOptimized: false, emissionKind: 1, file: !1, enums: !2, retainedTypes: !2, subprograms: !3, globals: !2, imports: !2)
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!1 = !MDFile(filename: "block.c", directory: "/tmp")
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!2 = !{}
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!3 = !{!4}
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!4 = !MDSubprogram(name: "foo", line: 3, isLocal: false, isDefinition: true, isOptimized: false, scopeLine: 3, file: !1, scope: !5, type: !6, function: void ()* @foo, variables: !2)
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!5 = !MDFile(filename: "block.c", directory: "/tmp")
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!6 = !MDSubroutineType(types: !7)
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!7 = !{null}
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!8 = !{i32 2, !"Dwarf Version", i32 2}
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!9 = !{i32 2, !"Debug Info Version", i32 3}
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!10 = !{i32 1, !"PIC Level", i32 2}
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!11 = !{!"clang version 3.6.0 (trunk 223120) (llvm/trunk 223119)"}
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!12 = !MDLocalVariable(tag: DW_TAG_auto_variable, name: "x", line: 4, scope: !4, file: !5, type: !13)
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!13 = !MDCompositeType(tag: DW_TAG_structure_type, size: 224, flags: DIFlagBlockByrefStruct, file: !1, scope: !5, elements: !14)
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!14 = !{!15, !17, !18, !20, !21}
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!15 = !MDDerivedType(tag: DW_TAG_member, name: "__isa", size: 64, align: 64, file: !1, scope: !5, baseType: !16)
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!16 = !MDDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: null)
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!17 = !MDDerivedType(tag: DW_TAG_member, name: "__forwarding", size: 64, align: 64, offset: 64, file: !1, scope: !5, baseType: !16)
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!18 = !MDDerivedType(tag: DW_TAG_member, name: "__flags", size: 32, align: 32, offset: 128, file: !1, scope: !5, baseType: !19)
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!19 = !MDBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!20 = !MDDerivedType(tag: DW_TAG_member, name: "__size", size: 32, align: 32, offset: 160, file: !1, scope: !5, baseType: !19)
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!21 = !MDDerivedType(tag: DW_TAG_member, name: "x", size: 32, align: 32, offset: 192, file: !1, scope: !5, baseType: !19)
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!22 = !MDExpression(DW_OP_plus, 8, DW_OP_deref, DW_OP_plus, 24)
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!23 = !MDLocation(line: 4, column: 15, scope: !4)
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!24 = !MDLocation(line: 4, column: 3, scope: !4)
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!25 = !MDLocation(line: 5, column: 3, scope: !4)
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!26 = !MDLocation(line: 6, column: 1, scope: !4)
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