diff options
| -rw-r--r-- | lib/CodeGen/AsmPrinter/DwarfDebug.cpp | 34 | ||||
| -rw-r--r-- | test/CodeGen/X86/unknown-location.ll | 2 |
2 files changed, 21 insertions, 15 deletions
diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp index 4dc53059c1..961b76e77e 100644 --- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp +++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp @@ -47,6 +47,10 @@ static cl::opt<bool> PrintDbgScope("print-dbgscope", cl::Hidden, static cl::opt<bool> DisableDebugInfoPrinting("disable-debug-info-print", cl::Hidden, cl::desc("Disable debug info printing")); +static cl::opt<bool> UnknownLocations("use-unknown-locations", cl::Hidden, + cl::desc("Make an absense of debug location information explicit."), + cl::init(false)); + namespace { const char *DWARFGroupName = "DWARF Emission"; const char *DbgTimerName = "DWARF Debug Writer"; @@ -2151,21 +2155,23 @@ void DwarfDebug::beginScope(const MachineInstr *MI) { // Check location. DebugLoc DL = MI->getDebugLoc(); if (DL.isUnknown()) { - // This instruction has no debug location. If the preceding instruction - // did, emit debug location information to indicate that the debug - // location is now unknown. - MCSymbol *Label = NULL; - if (DL == PrevInstLoc) - Label = PrevLabel; - else { - Label = recordSourceLine(DL.getLine(), DL.getCol(), 0); - PrevInstLoc = DL; - PrevLabel = Label; - } + if (UnknownLocations) { + // This instruction has no debug location. If the preceding instruction + // did, emit debug location information to indicate that the debug + // location is now unknown. + MCSymbol *Label = NULL; + if (DL == PrevInstLoc) + Label = PrevLabel; + else { + Label = recordSourceLine(DL.getLine(), DL.getCol(), 0); + PrevInstLoc = DL; + PrevLabel = Label; + } - // If this instruction begins a scope then note down corresponding label. - if (InsnsBeginScopeSet.count(MI) != 0) - LabelsBeforeInsn[MI] = Label; + // If this instruction begins a scope then note down corresponding label. + if (InsnsBeginScopeSet.count(MI) != 0) + LabelsBeforeInsn[MI] = Label; + } return; } diff --git a/test/CodeGen/X86/unknown-location.ll b/test/CodeGen/X86/unknown-location.ll index 80385233a1..fa98b781e4 100644 --- a/test/CodeGen/X86/unknown-location.ll +++ b/test/CodeGen/X86/unknown-location.ll @@ -1,4 +1,4 @@ -; RUN: llc < %s -asm-verbose=false -march=x86-64 | FileCheck %s +; RUN: llc < %s -asm-verbose=false -march=x86-64 -use-unknown-locations | FileCheck %s ; The divide instruction does not have a debug location. CodeGen should ; represent this in the debug information. This is checked by a check |