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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
127 lines
5.3 KiB
LLVM
127 lines
5.3 KiB
LLVM
; RUN: llc -O1 -filetype=obj -mtriple=x86_64-apple-darwin < %s > %t
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; RUN: llvm-dwarfdump %t | FileCheck %s
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; RUN: llvm-objdump -r %t | FileCheck -check-prefix=DARWIN %s
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; RUN: llc -O1 -filetype=obj -mtriple=x86_64-pc-linux-gnu < %s > %t
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; RUN: llvm-dwarfdump %t | FileCheck %s
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; RUN: llvm-objdump -r %t | FileCheck -check-prefix=LINUX %s
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; PR9493
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; Adapted from the original test case in r127757.
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; We use 'llc -O1' to induce variable 'x' to live in different locations.
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; We don't actually care where 'x' lives, or what exact optimizations get
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; used, as long as 'x' moves around we're fine.
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; // The variable 'x' lives in different locations, so it needs an entry in
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; // the .debug_loc table section, referenced by DW_AT_location.
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; // This ref is not relocatable on Darwin, and is relocatable elsewhere.
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; extern int g(int, int);
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; extern int a;
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;
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; void f(void) {
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; int x;
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; a = g(0, 0);
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; x = 1;
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; while (x & 1) { x *= a; }
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; a = g(x, 0);
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; x = 2;
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; while (x & 2) { x *= a; }
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; a = g(0, x);
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; }
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; // The 'x' variable and its symbol reference location
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; CHECK: .debug_info contents:
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; CHECK: DW_TAG_variable
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; CHECK-NEXT: DW_AT_location [DW_FORM_sec_offset] (0x00000000)
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; CHECK-NEXT: DW_AT_name {{.*}} "x"
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; CHECK-NEXT: DW_AT_decl_file
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; CHECK-NEXT: DW_AT_decl_line
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; CHECK-NEXT: DW_AT_type
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; Check that the location contains only 4 ranges - this verifies that the 4th
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; and 5th ranges were successfully merged into a single range.
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; CHECK: .debug_loc contents:
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; CHECK: 0x00000000:
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; CHECK: Beginning address offset:
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; CHECK: Beginning address offset:
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; CHECK: Beginning address offset:
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; CHECK: Beginning address offset:
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; CHECK-NOT: Beginning address offset:
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; Check that we have no relocations in Darwin's output.
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; DARWIN-NOT: X86_64_RELOC{{.*}} __debug_loc
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; Check we have a relocation for the debug_loc entry in Linux output.
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; LINUX: RELOCATION RECORDS FOR [.rela.debug_info]
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; LINUX-NOT: RELOCATION RECORDS
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; LINUX: R_X86_64{{.*}} .debug_loc+0
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; ModuleID = 'simple.c'
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target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-n32"
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@a = external global i32
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define void @f() nounwind {
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entry:
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%call = tail call i32 @g(i32 0, i32 0) nounwind, !dbg !8
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store i32 %call, i32* @a, align 4, !dbg !8
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tail call void @llvm.dbg.value(metadata i32 1, i64 0, metadata !5, metadata !MDExpression()), !dbg !13
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br label %while.body
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while.body: ; preds = %entry, %while.body
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%x.017 = phi i32 [ 1, %entry ], [ %mul, %while.body ]
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%mul = mul nsw i32 %call, %x.017, !dbg !14
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%and = and i32 %mul, 1, !dbg !14
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%tobool = icmp eq i32 %and, 0, !dbg !14
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br i1 %tobool, label %while.end, label %while.body, !dbg !14
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while.end: ; preds = %while.body
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tail call void @llvm.dbg.value(metadata i32 %mul, i64 0, metadata !5, metadata !MDExpression()), !dbg !14
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%call4 = tail call i32 @g(i32 %mul, i32 0) nounwind, !dbg !15
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store i32 %call4, i32* @a, align 4, !dbg !15
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tail call void @llvm.dbg.value(metadata i32 2, i64 0, metadata !5, metadata !MDExpression()), !dbg !17
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br label %while.body9
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while.body9: ; preds = %while.end, %while.body9
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%x.116 = phi i32 [ 2, %while.end ], [ %mul12, %while.body9 ]
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%mul12 = mul nsw i32 %call4, %x.116, !dbg !18
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%and7 = and i32 %mul12, 2, !dbg !18
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%tobool8 = icmp eq i32 %and7, 0, !dbg !18
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br i1 %tobool8, label %while.end13, label %while.body9, !dbg !18
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while.end13: ; preds = %while.body9
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tail call void @llvm.dbg.value(metadata i32 %mul12, i64 0, metadata !5, metadata !MDExpression()), !dbg !18
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%call15 = tail call i32 @g(i32 0, i32 %mul12) nounwind, !dbg !19
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store i32 %call15, i32* @a, align 4, !dbg !19
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ret void, !dbg !20
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}
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declare i32 @g(i32, i32)
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declare void @llvm.dbg.value(metadata, i64, metadata, metadata) nounwind readnone
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!llvm.dbg.cu = !{!2}
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!llvm.module.flags = !{!24}
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!0 = !MDSubprogram(name: "f", line: 4, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 4, file: !23, scope: !1, type: !3, function: void ()* @f, variables: !22)
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!1 = !MDFile(filename: "simple.c", directory: "/home/rengol01/temp/tests/dwarf/relocation")
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!2 = !MDCompileUnit(language: DW_LANG_C99, producer: "clang version 3.0 (trunk)", isOptimized: true, emissionKind: 1, file: !23, enums: !4, retainedTypes: !4, subprograms: !21, imports: null)
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!3 = !MDSubroutineType(types: !4)
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!4 = !{null}
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!5 = !MDLocalVariable(tag: DW_TAG_auto_variable, name: "x", line: 5, scope: !6, file: !1, type: !7)
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!6 = distinct !MDLexicalBlock(line: 4, column: 14, file: !23, scope: !0)
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!7 = !MDBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!8 = !MDLocation(line: 6, column: 3, scope: !6)
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!12 = !{i32 1}
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!13 = !MDLocation(line: 7, column: 3, scope: !6)
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!14 = !MDLocation(line: 8, column: 3, scope: !6)
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!15 = !MDLocation(line: 9, column: 3, scope: !6)
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!16 = !{i32 2}
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!17 = !MDLocation(line: 10, column: 3, scope: !6)
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!18 = !MDLocation(line: 11, column: 3, scope: !6)
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!19 = !MDLocation(line: 12, column: 3, scope: !6)
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!20 = !MDLocation(line: 13, column: 1, scope: !6)
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!21 = !{!0}
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!22 = !{!5}
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!23 = !MDFile(filename: "simple.c", directory: "/home/rengol01/temp/tests/dwarf/relocation")
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!24 = !{i32 1, !"Debug Info Version", i32 3}
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