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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
118 lines
4.8 KiB
LLVM
118 lines
4.8 KiB
LLVM
; RUN: llc -mtriple=x86_64-apple-darwin %s -o %t.o -filetype=obj -O0
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; RUN: llvm-dwarfdump %t.o | FileCheck %s
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;
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; Test that on x86_64, the 32-bit subregister esi is emitted as
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; DW_OP_piece 32 of the 64-bit rsi.
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;
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; rdar://problem/16015314
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;
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; CHECK: DW_AT_location [DW_FORM_block1] (<0x03> 54 93 04 )
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; CHECK: DW_AT_name [DW_FORM_strp]{{.*}} "a"
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;
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; struct bar {
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; int a;
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; int b;
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; };
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;
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; void doSomething() __attribute__ ((noinline));
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;
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; void doSomething(struct bar *b)
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; {
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; int a = b->a;
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; printf("%d\n", a); // set breakpoint here
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; }
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;
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; int main()
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; {
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; struct bar myBar = { 3, 4 };
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; doSomething(&myBar);
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; return 0;
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; }
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.9.0"
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%struct.bar = type { i32, i32 }
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@.str = private unnamed_addr constant [4 x i8] c"%d\0A\00", align 1
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@main.myBar = private unnamed_addr constant %struct.bar { i32 3, i32 4 }, align 4
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; Function Attrs: noinline nounwind ssp uwtable
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define void @doSomething(%struct.bar* nocapture readonly %b) #0 {
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entry:
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tail call void @llvm.dbg.value(metadata %struct.bar* %b, i64 0, metadata !15, metadata !MDExpression()), !dbg !25
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%a1 = getelementptr inbounds %struct.bar, %struct.bar* %b, i64 0, i32 0, !dbg !26
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%0 = load i32, i32* %a1, align 4, !dbg !26, !tbaa !27
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tail call void @llvm.dbg.value(metadata i32 %0, i64 0, metadata !16, metadata !MDExpression()), !dbg !26
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%call = tail call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([4 x i8]* @.str, i64 0, i64 0), i32 %0) #4, !dbg !32
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ret void, !dbg !33
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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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; Function Attrs: nounwind
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declare i32 @printf(i8* nocapture readonly, ...) #2
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; Function Attrs: nounwind ssp uwtable
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define i32 @main() #3 {
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entry:
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%myBar = alloca i64, align 8, !dbg !34
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%tmpcast = bitcast i64* %myBar to %struct.bar*, !dbg !34
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tail call void @llvm.dbg.declare(metadata %struct.bar* %tmpcast, metadata !21, metadata !MDExpression()), !dbg !34
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store i64 17179869187, i64* %myBar, align 8, !dbg !34
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call void @doSomething(%struct.bar* %tmpcast), !dbg !35
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ret i32 0, !dbg !36
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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 = { noinline nounwind ssp uwtable }
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attributes #1 = { nounwind readnone }
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attributes #2 = { nounwind }
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attributes #3 = { nounwind ssp uwtable }
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attributes #4 = { nounwind }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!22, !23}
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!llvm.ident = !{!24}
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!0 = !MDCompileUnit(language: DW_LANG_C99, producer: "clang version 3.5 ", isOptimized: true, emissionKind: 1, file: !1, enums: !2, retainedTypes: !2, subprograms: !3, globals: !2, imports: !2)
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!1 = !MDFile(filename: "subregisters.c", directory: "")
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!2 = !{}
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!3 = !{!4, !17}
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!4 = !MDSubprogram(name: "doSomething", line: 10, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 11, file: !1, scope: !5, type: !6, function: void (%struct.bar*)* @doSomething, variables: !14)
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!5 = !MDFile(filename: "subregisters.c", directory: "")
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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 = !MDCompositeType(tag: DW_TAG_structure_type, name: "bar", line: 3, size: 64, align: 32, file: !1, elements: !10)
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!10 = !{!11, !13}
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!11 = !MDDerivedType(tag: DW_TAG_member, name: "a", line: 4, size: 32, align: 32, file: !1, scope: !9, baseType: !12)
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!12 = !MDBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!13 = !MDDerivedType(tag: DW_TAG_member, name: "b", line: 5, size: 32, align: 32, offset: 32, file: !1, scope: !9, baseType: !12)
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!14 = !{!15, !16}
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!15 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "b", line: 10, arg: 1, scope: !4, file: !5, type: !8)
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!16 = !MDLocalVariable(tag: DW_TAG_auto_variable, name: "a", line: 12, scope: !4, file: !5, type: !12)
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!17 = !MDSubprogram(name: "main", line: 16, isLocal: false, isDefinition: true, virtualIndex: 6, isOptimized: true, scopeLine: 17, file: !1, scope: !5, type: !18, function: i32 ()* @main, variables: !20)
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!18 = !MDSubroutineType(types: !19)
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!19 = !{!12}
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!20 = !{!21}
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!21 = !MDLocalVariable(tag: DW_TAG_auto_variable, name: "myBar", line: 18, scope: !17, file: !5, type: !9)
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!22 = !{i32 2, !"Dwarf Version", i32 2}
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!23 = !{i32 1, !"Debug Info Version", i32 3}
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!24 = !{!"clang version 3.5 "}
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!25 = !MDLocation(line: 10, scope: !4)
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!26 = !MDLocation(line: 12, scope: !4)
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!27 = !{!28, !29, i64 0}
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!28 = !{!"bar", !29, i64 0, !29, i64 4}
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!29 = !{!"int", !30, i64 0}
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!30 = !{!"omnipotent char", !31, i64 0}
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!31 = !{!"Simple C/C++ TBAA"}
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!32 = !MDLocation(line: 13, scope: !4)
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!33 = !MDLocation(line: 14, scope: !4)
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!34 = !MDLocation(line: 18, scope: !17)
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!35 = !MDLocation(line: 19, scope: !17)
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!36 = !MDLocation(line: 20, scope: !17)
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