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https://github.com/c64scene-ar/llvm-6502.git
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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
108 lines
4.8 KiB
LLVM
108 lines
4.8 KiB
LLVM
; RUN: llc -O0 -mtriple=x86_64-apple-darwin -filetype=asm %s -o - | FileCheck %s
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; Ensure that we generate an indirect location for the variable length array a.
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; CHECK: ##DEBUG_VALUE: vla:a <- RDX
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; CHECK: DW_OP_breg1
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; rdar://problem/13658587
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;
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; generated from:
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;
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; int vla(int n) {
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; int a[n];
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; a[0] = 42;
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; return a[n-1];
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; }
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;
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; int main(int argc, char** argv) {
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; return vla(argc);
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; }
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; ModuleID = 'vla.c'
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target datalayout = "e-p:64:64:64-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-s0:64:64-f80:128:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.8.0"
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; Function Attrs: nounwind ssp uwtable
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define i32 @vla(i32 %n) nounwind ssp uwtable {
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entry:
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%n.addr = alloca i32, align 4
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%saved_stack = alloca i8*
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%cleanup.dest.slot = alloca i32
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store i32 %n, i32* %n.addr, align 4
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call void @llvm.dbg.declare(metadata i32* %n.addr, metadata !15, metadata !MDExpression()), !dbg !16
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%0 = load i32, i32* %n.addr, align 4, !dbg !17
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%1 = zext i32 %0 to i64, !dbg !17
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%2 = call i8* @llvm.stacksave(), !dbg !17
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store i8* %2, i8** %saved_stack, !dbg !17
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%vla = alloca i32, i64 %1, align 16, !dbg !17
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call void @llvm.dbg.declare(metadata i32* %vla, metadata !18, metadata !MDExpression(DW_OP_deref)), !dbg !17
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%arrayidx = getelementptr inbounds i32, i32* %vla, i64 0, !dbg !22
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store i32 42, i32* %arrayidx, align 4, !dbg !22
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%3 = load i32, i32* %n.addr, align 4, !dbg !23
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%sub = sub nsw i32 %3, 1, !dbg !23
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%idxprom = sext i32 %sub to i64, !dbg !23
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%arrayidx1 = getelementptr inbounds i32, i32* %vla, i64 %idxprom, !dbg !23
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%4 = load i32, i32* %arrayidx1, align 4, !dbg !23
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store i32 1, i32* %cleanup.dest.slot
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%5 = load i8*, i8** %saved_stack, !dbg !24
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call void @llvm.stackrestore(i8* %5), !dbg !24
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ret i32 %4, !dbg !23
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}
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.declare(metadata, metadata, metadata) nounwind readnone
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; Function Attrs: nounwind
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declare i8* @llvm.stacksave() nounwind
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; Function Attrs: nounwind
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declare void @llvm.stackrestore(i8*) nounwind
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; Function Attrs: nounwind ssp uwtable
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define i32 @main(i32 %argc, i8** %argv) nounwind ssp uwtable {
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entry:
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%retval = alloca i32, align 4
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%argc.addr = alloca i32, align 4
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%argv.addr = alloca i8**, align 8
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store i32 0, i32* %retval
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store i32 %argc, i32* %argc.addr, align 4
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call void @llvm.dbg.declare(metadata i32* %argc.addr, metadata !25, metadata !MDExpression()), !dbg !26
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store i8** %argv, i8*** %argv.addr, align 8
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call void @llvm.dbg.declare(metadata i8*** %argv.addr, metadata !27, metadata !MDExpression()), !dbg !26
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%0 = load i32, i32* %argc.addr, align 4, !dbg !28
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%call = call i32 @vla(i32 %0), !dbg !28
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ret i32 %call, !dbg !28
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}
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!29}
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!0 = !MDCompileUnit(language: DW_LANG_C99, producer: "clang version 3.3 ", isOptimized: false, emissionKind: 1, file: !1, enums: !2, retainedTypes: !2, subprograms: !3, globals: !2, imports: !2)
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!1 = !MDFile(filename: "vla.c", directory: "")
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!2 = !{}
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!3 = !{!4, !9}
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!4 = !MDSubprogram(name: "vla", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 1, file: !1, scope: !5, type: !6, function: i32 (i32)* @vla, variables: !2)
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!5 = !MDFile(filename: "vla.c", directory: "")
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!6 = !MDSubroutineType(types: !7)
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!7 = !{!8, !8}
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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 = !MDSubprogram(name: "main", line: 7, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 7, file: !1, scope: !5, type: !10, function: i32 (i32, i8**)* @main, variables: !2)
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!10 = !MDSubroutineType(types: !11)
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!11 = !{!8, !8, !12}
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!12 = !MDDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !13)
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!13 = !MDDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !14)
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!14 = !MDBasicType(tag: DW_TAG_base_type, name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char)
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!15 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "n", line: 1, arg: 1, scope: !4, file: !5, type: !8)
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!16 = !MDLocation(line: 1, scope: !4)
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!17 = !MDLocation(line: 2, scope: !4)
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!18 = !MDLocalVariable(tag: DW_TAG_auto_variable, name: "a", line: 2, scope: !4, file: !5, type: !19)
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!19 = !MDCompositeType(tag: DW_TAG_array_type, align: 32, baseType: !8, elements: !20)
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!20 = !{!21}
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!21 = !MDSubrange(count: -1)
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!22 = !MDLocation(line: 3, scope: !4)
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!23 = !MDLocation(line: 4, scope: !4)
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!24 = !MDLocation(line: 5, scope: !4)
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!25 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "argc", line: 7, arg: 1, scope: !9, file: !5, type: !8)
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!26 = !MDLocation(line: 7, scope: !9)
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!27 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "argv", line: 7, arg: 2, scope: !9, file: !5, type: !12)
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!28 = !MDLocation(line: 8, scope: !9)
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!29 = !{i32 1, !"Debug Info Version", i32 3}
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