diff --git a/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp --- a/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp +++ b/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp @@ -131,6 +131,11 @@ #define DEBUG_TYPE "asm-printer" +// FIXME: this option currently only applies to DWARF, and not CodeView, tables +static cl::opt + DisableDebugInfoPrinting("disable-debug-info-print", cl::Hidden, + cl::desc("Disable debug info printing")); + static const char *const DWARFGroupName = "dwarf"; static const char *const DWARFGroupDescription = "DWARF Emission"; static const char *const DbgTimerName = "emit"; @@ -232,9 +237,11 @@ } void AsmPrinter::emitInitialRawDwarfLocDirective(const MachineFunction &MF) { - assert(DD && "Dwarf debug file is not defined."); - assert(OutStreamer->hasRawTextSupport() && "Expected assembly output mode."); - (void)DD->emitInitialLocDirective(MF, /*CUID=*/0); + if (DD) { + assert(OutStreamer->hasRawTextSupport() && + "Expected assembly output mode."); + (void)DD->emitInitialLocDirective(MF, /*CUID=*/0); + } } /// getCurrentSection() - Return the current section we are emitting to. @@ -262,6 +269,9 @@ OutStreamer->InitSections(false); + if (DisableDebugInfoPrinting) + MMI->setDebugInfoAvailability(false); + // Emit the version-min deployment target directive if needed. // // FIXME: If we end up with a collection of these sorts of Darwin-specific @@ -314,10 +324,12 @@ CodeViewLineTablesGroupDescription); } if (!EmitCodeView || M.getDwarfVersion()) { - DD = new DwarfDebug(this); - Handlers.emplace_back(std::unique_ptr(DD), DbgTimerName, - DbgTimerDescription, DWARFGroupName, - DWARFGroupDescription); + if (!DisableDebugInfoPrinting) { + DD = new DwarfDebug(this); + Handlers.emplace_back(std::unique_ptr(DD), DbgTimerName, + DbgTimerDescription, DWARFGroupName, + DWARFGroupDescription); + } } } diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp --- a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp +++ b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp @@ -67,10 +67,6 @@ STATISTIC(NumCSParams, "Number of dbg call site params created"); -static cl::opt -DisableDebugInfoPrinting("disable-debug-info-print", cl::Hidden, - cl::desc("Disable debug info printing")); - static cl::opt UseDwarfRangesBaseAddressSpecifier( "use-dwarf-ranges-base-address-specifier", cl::Hidden, cl::desc("Use base address specifiers in debug_ranges"), cl::init(false)); @@ -1122,7 +1118,7 @@ void DwarfDebug::beginModule(Module *M) { DebugHandlerBase::beginModule(M); - if (!Asm || !MMI->hasDebugInfo() || DisableDebugInfoPrinting) + if (!Asm || !MMI->hasDebugInfo()) return; unsigned NumDebugCUs = std::distance(M->debug_compile_units_begin(), @@ -1390,9 +1386,8 @@ } // If we aren't actually generating debug info (check beginModule - - // conditionalized on !DisableDebugInfoPrinting and the presence of the - // llvm.dbg.cu metadata node) - if (!Asm || !MMI->hasDebugInfo() || DisableDebugInfoPrinting) + // conditionalized on the presence of the llvm.dbg.cu metadata node) + if (!Asm || !MMI->hasDebugInfo()) return; // Finalize the debug info for the module. diff --git a/llvm/test/CodeGen/Generic/disable-debug-info-print.ll b/llvm/test/CodeGen/Generic/disable-debug-info-print.ll new file mode 100644 --- /dev/null +++ b/llvm/test/CodeGen/Generic/disable-debug-info-print.ll @@ -0,0 +1,52 @@ +; RUN: llc -disable-debug-info-print=true -exception-model=dwarf -o - %s | FileCheck %s +; RUN: llc -disable-debug-info-print=true -exception-model=sjlj -o - %s | FileCheck %s --check-prefix=SJLJ-CHECK + +define i16 @main() nounwind !dbg !7 { +entry: + ret i16 0, !dbg !9 +} + +define i16 @helper() !dbg !10 { +entry: + ret i16 0, !dbg !11 +} + + +; CHECK: .file "disable-debug-info-print.ll" +; CHECK: main +; CHECK-NOT: cfi_startproc +; CHECK-NOT: .file +; CHECK-NOT: .loc +; CHECK: helper +; CHECK: cfi_startproc +; CHECK-NOT: .file +; CHECK-NOT: .loc +; CHECK: cfi_endproc + +; SJLJ-CHECK: .file "disable-debug-info-print.ll" +; SJLJ-CHECK: main +; SJLJ-CHECK-NOT: cfi_startproc +; SJLJ-CHECK-NOT: .file +; SJLJ-CHECK-NOT: .loc +; SJLJ-CHECK: helper +; SJLJ-CHECK-NOT: cfi_startproc +; SJLJ-CHECK-NOT: .file +; SJLJ-CHECK-NOT: .loc + + +!llvm.dbg.cu = !{!0} +!llvm.module.flags = !{!3, !4, !5} +!llvm.ident = !{!6} + +!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 12.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: LineTablesOnly, enums: !2, splitDebugInlining: false, nameTableKind: None) +!1 = !DIFile(filename: "unwind-tables.c", directory: "/tmp") +!2 = !{} +!3 = !{i32 7, !"Dwarf Version", i32 4} +!4 = !{i32 2, !"Debug Info Version", i32 3} +!5 = !{i32 1, !"wchar_size", i32 4} +!6 = !{!"clang version 12.0.0"} +!7 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 1, type: !8, scopeLine: 1, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2) +!8 = !DISubroutineType(types: !2) +!9 = !DILocation(line: 2, column: 3, scope: !7) +!10 = distinct !DISubprogram(name: "helper", scope: !1, file: !1, line: 1, type: !8, scopeLine: 1, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2) +!11 = !DILocation(line: 2, column: 3, scope: !10)