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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
98 lines
4.6 KiB
LLVM
98 lines
4.6 KiB
LLVM
; RUN: opt %s -sroa -verify -S -o - | FileCheck %s
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;
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; Test that we can partial emit debug info for aggregates repeatedly
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; split up by SROA.
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;
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; // Compile with -O1
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; typedef struct {
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; int a;
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; long int b;
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; } Inner;
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;
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; typedef struct {
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; Inner inner[2];
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; } Outer;
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;
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; int foo(Outer outer) {
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; Inner i1 = outer.inner[1];
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; return i1.a;
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; }
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;
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; Verify that SROA creates a variable piece when splitting i1.
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; CHECK: %[[I1:.*]] = alloca [12 x i8], align 4
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; CHECK: call void @llvm.dbg.declare(metadata [12 x i8]* %[[I1]], metadata ![[VAR:[0-9]+]], metadata ![[PIECE1:[0-9]+]])
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; CHECK: call void @llvm.dbg.value(metadata i32 %[[A:.*]], i64 0, metadata ![[VAR]], metadata ![[PIECE2:[0-9]+]])
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; CHECK: ret i32 %[[A]]
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; Read Var and Piece:
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; CHECK: ![[VAR]] = !MDLocalVariable(tag: DW_TAG_auto_variable, name: "i1",{{.*}} line: 11,
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; CHECK: ![[PIECE1]] = !MDExpression(DW_OP_bit_piece, 32, 96)
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; CHECK: ![[PIECE2]] = !MDExpression(DW_OP_bit_piece, 0, 32)
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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.Outer = type { [2 x %struct.Inner] }
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%struct.Inner = type { i32, i64 }
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; Function Attrs: nounwind ssp uwtable
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define i32 @foo(%struct.Outer* byval align 8 %outer) #0 {
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entry:
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%i1 = alloca %struct.Inner, align 8
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call void @llvm.dbg.declare(metadata %struct.Outer* %outer, metadata !25, metadata !2), !dbg !26
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call void @llvm.dbg.declare(metadata %struct.Inner* %i1, metadata !27, metadata !2), !dbg !28
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%inner = getelementptr inbounds %struct.Outer, %struct.Outer* %outer, i32 0, i32 0, !dbg !28
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%arrayidx = getelementptr inbounds [2 x %struct.Inner], [2 x %struct.Inner]* %inner, i32 0, i64 1, !dbg !28
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%0 = bitcast %struct.Inner* %i1 to i8*, !dbg !28
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%1 = bitcast %struct.Inner* %arrayidx to i8*, !dbg !28
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call void @llvm.memcpy.p0i8.p0i8.i64(i8* %0, i8* %1, i64 16, i32 8, i1 false), !dbg !28
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%a = getelementptr inbounds %struct.Inner, %struct.Inner* %i1, i32 0, i32 0, !dbg !29
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%2 = load i32, i32* %a, align 4, !dbg !29
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ret i32 %2, !dbg !29
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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 void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture readonly, i64, i32, i1) #2
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attributes #0 = { nounwind ssp uwtable }
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attributes #1 = { nounwind readnone }
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attributes #2 = { 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 3.5.0 ", isOptimized: false, emissionKind: 1, file: !1, enums: !2, retainedTypes: !2, subprograms: !3, globals: !2, imports: !2)
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!1 = !MDFile(filename: "sroasplit-1.c", directory: "")
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!2 = !MDExpression()
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!3 = !{!4}
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!4 = !MDSubprogram(name: "foo", line: 10, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 10, file: !1, scope: !5, type: !6, function: i32 (%struct.Outer*)* @foo, variables: !2)
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!5 = !MDFile(filename: "sroasplit-1.c", 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 = !MDDerivedType(tag: DW_TAG_typedef, name: "Outer", line: 8, file: !1, baseType: !10)
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!10 = !MDCompositeType(tag: DW_TAG_structure_type, line: 6, size: 256, align: 64, file: !1, elements: !11)
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!11 = !{!12}
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!12 = !MDDerivedType(tag: DW_TAG_member, name: "inner", line: 7, size: 256, align: 64, file: !1, scope: !10, baseType: !13)
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!13 = !MDCompositeType(tag: DW_TAG_array_type, size: 256, align: 64, baseType: !14, elements: !20)
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!14 = !MDDerivedType(tag: DW_TAG_typedef, name: "Inner", line: 4, file: !1, baseType: !15)
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!15 = !MDCompositeType(tag: DW_TAG_structure_type, line: 1, size: 128, align: 64, file: !1, elements: !16)
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!16 = !{!17, !18}
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!17 = !MDDerivedType(tag: DW_TAG_member, name: "a", line: 2, size: 32, align: 32, file: !1, scope: !15, baseType: !8)
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!18 = !MDDerivedType(tag: DW_TAG_member, name: "b", line: 3, size: 64, align: 64, offset: 64, file: !1, scope: !15, baseType: !19)
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!19 = !MDBasicType(tag: DW_TAG_base_type, name: "long int", size: 64, align: 64, encoding: DW_ATE_signed)
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!20 = !{!21}
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!21 = !MDSubrange(count: 2)
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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 3.5.0 "}
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!25 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "outer", line: 10, arg: 1, scope: !4, file: !5, type: !9)
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!26 = !MDLocation(line: 10, scope: !4)
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!27 = !MDLocalVariable(tag: DW_TAG_auto_variable, name: "i1", line: 11, scope: !4, file: !5, type: !14)
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!28 = !MDLocation(line: 11, scope: !4)
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!29 = !MDLocation(line: 12, scope: !4)
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