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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
73 lines
3.3 KiB
LLVM
73 lines
3.3 KiB
LLVM
; RUN: opt < %s -add-discriminators -S | FileCheck %s
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; We should not generate discriminators for DWARF versions prior to 4.
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;
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; Original code:
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;
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; int foo(long i) {
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; if (i < 5) return 2; else return 90;
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; }
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;
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; None of the !dbg nodes associated with the if() statement should be
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; altered. If they are, it means that the discriminators pass added a
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; new lexical scope.
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define i32 @foo(i64 %i) #0 {
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entry:
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%retval = alloca i32, align 4
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%i.addr = alloca i64, align 8
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store i64 %i, i64* %i.addr, align 8
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call void @llvm.dbg.declare(metadata i64* %i.addr, metadata !13, metadata !{}), !dbg !14
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%0 = load i64, i64* %i.addr, align 8, !dbg !15
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; CHECK: %0 = load i64, i64* %i.addr, align 8, !dbg ![[ENTRY:[0-9]+]]
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%cmp = icmp slt i64 %0, 5, !dbg !15
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; CHECK: %cmp = icmp slt i64 %0, 5, !dbg ![[ENTRY:[0-9]+]]
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br i1 %cmp, label %if.then, label %if.else, !dbg !15
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; CHECK: br i1 %cmp, label %if.then, label %if.else, !dbg ![[ENTRY:[0-9]+]]
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if.then: ; preds = %entry
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store i32 2, i32* %retval, !dbg !15
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br label %return, !dbg !15
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if.else: ; preds = %entry
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store i32 90, i32* %retval, !dbg !15
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br label %return, !dbg !15
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return: ; preds = %if.else, %if.then
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%1 = load i32, i32* %retval, !dbg !17
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ret i32 %1, !dbg !17
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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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attributes #0 = { nounwind uwtable "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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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!10, !11}
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!llvm.ident = !{!12}
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!0 = !MDCompileUnit(language: DW_LANG_C99, producer: "clang version 3.5.0 ", isOptimized: false, emissionKind: 1, file: !1, enums: !2, retainedTypes: !2, subprograms: !3, globals: !2, imports: !2)
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!1 = !MDFile(filename: "no-discriminators", directory: ".")
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!2 = !{}
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!3 = !{!4}
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!4 = !MDSubprogram(name: "foo", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 1, file: !1, scope: !5, type: !6, function: i32 (i64)* @foo, variables: !2)
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; CHECK: ![[FOO:[0-9]+]] = !MDSubprogram(name: "foo"
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!5 = !MDFile(filename: "no-discriminators", directory: ".")
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!6 = !MDSubroutineType(types: !7)
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!7 = !{!8, !9}
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!8 = !MDBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!9 = !MDBasicType(tag: DW_TAG_base_type, name: "long int", size: 64, align: 64, encoding: DW_ATE_signed)
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!10 = !{i32 2, !"Dwarf Version", i32 2}
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; CHECK: !{i32 2, !"Dwarf Version", i32 2}
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!11 = !{i32 1, !"Debug Info Version", i32 3}
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!12 = !{!"clang version 3.5.0 "}
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!13 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "i", line: 1, arg: 1, scope: !4, file: !5, type: !9)
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!14 = !MDLocation(line: 1, scope: !4)
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!15 = !MDLocation(line: 2, scope: !16)
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; CHECK: ![[ENTRY]] = !MDLocation(line: 2, scope: ![[BLOCK:[0-9]+]])
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!16 = distinct !MDLexicalBlock(line: 2, column: 0, file: !1, scope: !4)
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; CHECK: ![[BLOCK]] = distinct !MDLexicalBlock(scope: ![[FOO]],{{.*}} line: 2)
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!17 = !MDLocation(line: 3, scope: !4)
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