279e808b75
Remove unneeded details like "<" and ">". Reduce indentation. Omit `this` address to simplify output comparison. Add a -debug-only=mc-dump test. While here, add fixup printing for MCRelaxableFragment.
95 lines
4.8 KiB
LLVM
95 lines
4.8 KiB
LLVM
; RUN: llc %s -o %t.o -filetype=obj
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; RUN: llvm-dwarfdump --debug-line %t.o | FileCheck %s --check-prefix=LINES
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; RUN: llc %s -o %t.o -filetype=obj -debug-only=mc-dump 2>&1 | FileCheck %s --check-prefix=FRAGMENTS
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;
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; REQUIRES: asserts
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;; Test (using mc-dump debug output) that .debug_line can be arranged in memory
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;; using a single data fragment for a simple function, instead of using multiple
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;; MCDwarfFragment fragments in un-necessary cirucmstances. Some targets want
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;; multiple fragments so that they can linker-relax the linetable, but x86
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;; doesn't.
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;;
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;; First, sanity check that the linetable output is as expected,
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; LINES: Address Line Column File ISA Discriminator OpIndex Flags
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; LINES-NEXT: ------------------ ------ ------ ------ --- ------------- ------- -------------
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; LINES-NEXT: 0x0000000000000000 3 5 0 0 0 0 is_stmt prologue_end
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; LINES-NEXT: 0x0000000000000003 4 12 0 0 0 0 is_stmt
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; LINES-NEXT: 0x0000000000000007 4 3 0 0 0 0
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; LINES-NEXT: 0x0000000000000008 4 3 0 0 0 0 end_sequence
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;; Here's a typical example of .debug_line in a suboptimal arrangement: for each
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;; address-delta there's an MCDwarfFragment computing the delta during
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;; relaxation.
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;;
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;; <MCSection Name:.debug_line Fragments:[
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;; <MCDataFragment<MCFragment
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;; Contents:[...
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;; Fixups:[...
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;; <MCDwarfFragment<MCFragment 0x5624fe435a80 LayoutOrder:1 Offset:86 HasInstructions:0 BundlePadding:0>
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;; AddrDelta:- LineDelta:1>,
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;; <MCDataFragment<MCFragment 0x5624fe435b00 LayoutOrder:2 Offset:87 HasInstructions:0 BundlePadding:0>
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;; Contents:[05,03,06] (3 bytes)>,
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;; <MCDwarfFragment<MCFragment 0x5624fe435bd0 LayoutOrder:3 Offset:90 HasInstructions:0 BundlePadding:0>
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;; AddrDelta:- LineDelta:0>,
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;; <MCDwarfFragment<MCFragment 0x5624fe435c50 LayoutOrder:4 Offset:91 HasInstructions:0 BundlePadding:0>
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;; AddrDelta:- LineDelta:9223372036854775807>,
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;; <MCDataFragment<MCFragment 0x5624fe435cd0 LayoutOrder:5 Offset:96 HasInstructions:0 BundlePadding:0>
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;; Contents:[] (0 bytes)>]>,
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;;
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;; The function in question is made of a single data fragment where the address
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;; deltas are known at assembly time. We can (and should) emit .debug_line as a
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;; single data fragment. (Check that we see one data fragment, then no more
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;; fragments until the next section).
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;
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; FRAGMENTS: Section Name:.debug_line
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; FRAGMENTS-NEXT: Data
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; FRAGMENTS-NEXT: Fixup
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;
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; FRAGMENTS-NOT: Data
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;
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; FRAGMENTS: Section Name:.debug_line_str
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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define dso_local i32 @foo(i32 noundef %a, i32 noundef %b) local_unnamed_addr #0 !dbg !10 {
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entry:
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#dbg_value(i32 %a, !15, !DIExpression(), !17)
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#dbg_value(i32 %b, !16, !DIExpression(), !17)
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%add = add nsw i32 %a, 1, !dbg !18
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#dbg_value(i32 %add, !15, !DIExpression(), !17)
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%mul = mul nsw i32 %b, 5, !dbg !19
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#dbg_value(i32 %mul, !16, !DIExpression(), !17)
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%add1 = add nsw i32 %add, %mul, !dbg !20
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ret i32 %add1, !dbg !21
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}
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!2, !3, !4, !5, !6, !7, !8}
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!llvm.ident = !{!9}
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!0 = distinct !DICompileUnit(language: DW_LANG_C11, file: !1, producer: "clang version 21.0.0git (/fast/fs/llvm4 8bd196e0eaf4310ad2d9598512d13220b28b9aee)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, splitDebugInlining: false, nameTableKind: None)
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!1 = !DIFile(filename: "text.c", directory: "/fast/fs/llvm-main", checksumkind: CSK_MD5, checksum: "e81ed96ea393640bf1b965103b190e09")
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!2 = !{i32 7, !"Dwarf Version", i32 5}
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!3 = !{i32 2, !"Debug Info Version", i32 3}
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!4 = !{i32 1, !"wchar_size", i32 4}
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!5 = !{i32 8, !"PIC Level", i32 2}
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!6 = !{i32 7, !"PIE Level", i32 2}
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!7 = !{i32 7, !"uwtable", i32 2}
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!8 = !{i32 7, !"debug-info-assignment-tracking", i1 true}
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!9 = !{!"clang version 21.0.0git (/fast/fs/llvm4 8bd196e0eaf4310ad2d9598512d13220b28b9aee)"}
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!10 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 1, type: !11, scopeLine: 1, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !14)
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!11 = !DISubroutineType(types: !12)
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!12 = !{!13, !13, !13}
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!13 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!14 = !{!15, !16}
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!15 = !DILocalVariable(name: "a", arg: 1, scope: !10, file: !1, line: 1, type: !13)
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!16 = !DILocalVariable(name: "b", arg: 2, scope: !10, file: !1, line: 1, type: !13)
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!17 = !DILocation(line: 0, scope: !10)
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!18 = !DILocation(line: 2, column: 5, scope: !10)
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!19 = !DILocation(line: 3, column: 5, scope: !10)
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!20 = !DILocation(line: 4, column: 12, scope: !10)
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!21 = !DILocation(line: 4, column: 3, scope: !10)
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