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llvm-project/llvm/test/CodeGen/X86/debugloc-no-line-0.ll

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Improve line debug info when translating a CaseBlock to SDNodes. The SelectionDAGBuilder translates various conditional branches into CaseBlocks which are then translated into SDNodes. If a conditional branch results in multiple CaseBlocks only the first CaseBlock is translated into SDNodes immediately, the rest of the CaseBlocks are put in a queue and processed when all LLVM IR instructions in the basic block have been processed. When a CaseBlock is transformed into SDNodes the SelectionDAGBuilder is queried for the current LLVM IR instruction and the resulting SDNodes are annotated with the debug info of the current instruction (if it exists and has debug metadata). When the deferred CaseBlocks are processed, the SelectionDAGBuilder does not have a current LLVM IR instruction, and the resulting SDNodes will not have any debuginfo. As DwarfDebug::beginInstruction() outputs a .loc directive for the first instruction in a labeled block (typically the case for something coming from a CaseBlock) this tends to produce a line-0 directive. This patch changes the handling of CaseBlocks to store the current instruction's debug info into the CaseBlock when it is created (and the SelectionDAGBuilder knows the current instruction) and to always use the stored debug info when translating a CaseBlock to SDNodes. Patch by Frej Drejhammar! Differential Revision: https://reviews.llvm.org/D36671 llvm-svn: 311097
2017-08-18 00:57:13 +08:00
; RUN: llc -O0 -mtriple=x86_64-unknown-linux-gnu -stop-before="regallocfast" -o - %s | FileCheck %s
;
; We check that all the instructions in bb4 now have a debug-location
; annotation, and that the annotation is identical to the one on e.g.,
; the jmp to bb4.
;
[CodeGen] Unify MBB reference format in both MIR and debug output As part of the unification of the debug format and the MIR format, print MBB references as '%bb.5'. The MIR printer prints the IR name of a MBB only for block definitions. * find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" \) -type f -print0 | xargs -0 sed -i '' -E 's/BB#" << ([a-zA-Z0-9_]+)->getNumber\(\)/" << printMBBReference(*\1)/g' * find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" \) -type f -print0 | xargs -0 sed -i '' -E 's/BB#" << ([a-zA-Z0-9_]+)\.getNumber\(\)/" << printMBBReference(\1)/g' * find . \( -name "*.txt" -o -name "*.s" -o -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" \) -type f -print0 | xargs -0 sed -i '' -E 's/BB#([0-9]+)/%bb.\1/g' * grep -nr 'BB#' and fix Differential Revision: https://reviews.llvm.org/D40422 llvm-svn: 319665
2017-12-05 01:18:51 +08:00
; CHECK: JMP{{.*}}%bb.4, debug-location ![[JUMPLOC:[0-9]+]]
Improve line debug info when translating a CaseBlock to SDNodes. The SelectionDAGBuilder translates various conditional branches into CaseBlocks which are then translated into SDNodes. If a conditional branch results in multiple CaseBlocks only the first CaseBlock is translated into SDNodes immediately, the rest of the CaseBlocks are put in a queue and processed when all LLVM IR instructions in the basic block have been processed. When a CaseBlock is transformed into SDNodes the SelectionDAGBuilder is queried for the current LLVM IR instruction and the resulting SDNodes are annotated with the debug info of the current instruction (if it exists and has debug metadata). When the deferred CaseBlocks are processed, the SelectionDAGBuilder does not have a current LLVM IR instruction, and the resulting SDNodes will not have any debuginfo. As DwarfDebug::beginInstruction() outputs a .loc directive for the first instruction in a labeled block (typically the case for something coming from a CaseBlock) this tends to produce a line-0 directive. This patch changes the handling of CaseBlocks to store the current instruction's debug info into the CaseBlock when it is created (and the SelectionDAGBuilder knows the current instruction) and to always use the stored debug info when translating a CaseBlock to SDNodes. Patch by Frej Drejhammar! Differential Revision: https://reviews.llvm.org/D36671 llvm-svn: 311097
2017-08-18 00:57:13 +08:00
; CHECK: bb.4.entry:
; CHECK: successors:
; CHECK: JE{{.*}}debug-location ![[JUMPLOC]]
; CHECK: JMP{{.*}}debug-location ![[JUMPLOC]]
define i32 @main() !dbg !12 {
entry:
%add = add nsw i32 undef, 1, !dbg !16
switch i32 %add, label %sw.epilog [
i32 1, label %sw.bb
i32 2, label %sw.bb2
], !dbg !17
sw.bb: ; preds = %entry
br label %sw.epilog, !dbg !20
sw.bb2: ; preds = %entry
br label %sw.epilog, !dbg !22
sw.epilog: ; preds = %sw.bb2, %sw.bb, %entry
ret i32 4711, !dbg !23
}
!llvm.dbg.cu = !{!2}
!llvm.module.flags = !{!8, !9}
!llvm.ident = !{!11}
!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, emissionKind: FullDebug, enums: !4)
!3 = !DIFile(filename: "foo.c", directory: ".")
!4 = !{}
!7 = !DIBasicType(name: "int", size: 16, encoding: DW_ATE_signed)
!8 = !{i32 2, !"Dwarf Version", i32 4}
!9 = !{i32 2, !"Debug Info Version", i32 3}
!11 = !{!"clang"}
[DebugInfo] Add DILabel metadata and intrinsic llvm.dbg.label. In order to set breakpoints on labels and list source code around labels, we need collect debug information for labels, i.e., label name, the function label belong, line number in the file, and the address label located. In order to keep these information in LLVM IR and to allow backend to generate debug information correctly. We create a new kind of metadata for labels, DILabel. The format of DILabel is !DILabel(scope: !1, name: "foo", file: !2, line: 3) We hope to keep debug information as much as possible even the code is optimized. So, we create a new kind of intrinsic for label metadata to avoid the metadata is eliminated with basic block. The intrinsic will keep existing if we keep it from optimized out. The format of the intrinsic is llvm.dbg.label(metadata !1) It has only one argument, that is the DILabel metadata. The intrinsic will follow the label immediately. Backend could get the label metadata through the intrinsic's parameter. We also create DIBuilder API for labels to be used by Frontend. Frontend could use createLabel() to allocate DILabel objects, and use insertLabel() to insert llvm.dbg.label intrinsic in LLVM IR. Differential Revision: https://reviews.llvm.org/D45024 Patch by Hsiangkai Wang. llvm-svn: 331841
2018-05-09 10:40:45 +08:00
!12 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 4, type: !13, isLocal: false, isDefinition: true, scopeLine: 5, flags: DIFlagPrototyped, isOptimized: false, unit: !2, retainedNodes: !4)
Improve line debug info when translating a CaseBlock to SDNodes. The SelectionDAGBuilder translates various conditional branches into CaseBlocks which are then translated into SDNodes. If a conditional branch results in multiple CaseBlocks only the first CaseBlock is translated into SDNodes immediately, the rest of the CaseBlocks are put in a queue and processed when all LLVM IR instructions in the basic block have been processed. When a CaseBlock is transformed into SDNodes the SelectionDAGBuilder is queried for the current LLVM IR instruction and the resulting SDNodes are annotated with the debug info of the current instruction (if it exists and has debug metadata). When the deferred CaseBlocks are processed, the SelectionDAGBuilder does not have a current LLVM IR instruction, and the resulting SDNodes will not have any debuginfo. As DwarfDebug::beginInstruction() outputs a .loc directive for the first instruction in a labeled block (typically the case for something coming from a CaseBlock) this tends to produce a line-0 directive. This patch changes the handling of CaseBlocks to store the current instruction's debug info into the CaseBlock when it is created (and the SelectionDAGBuilder knows the current instruction) and to always use the stored debug info when translating a CaseBlock to SDNodes. Patch by Frej Drejhammar! Differential Revision: https://reviews.llvm.org/D36671 llvm-svn: 311097
2017-08-18 00:57:13 +08:00
!13 = !DISubroutineType(types: !14)
!14 = !{!7}
!16 = !DILocation(line: 6, column: 13, scope: !12)
!17 = !DILocation(line: 6, column: 3, scope: !12)
!19 = distinct !DILexicalBlock(scope: !12, file: !3, line: 7, column: 5)
!20 = !DILocation(line: 10, column: 7, scope: !19)
!22 = !DILocation(line: 13, column: 7, scope: !19)
!23 = !DILocation(line: 24, column: 1, scope: !12)