5 files changed, 14 insertions, 0 deletions
diff --git a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
index bfc2e35cf3..b640a589ba 100644
--- a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
+++ b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
@@ -142,6 +142,14 @@ bool AsmPrinter::doInitialization(Module &M) {
   
   GCModuleInfo *MI = getAnalysisToUpdate<GCModuleInfo>();
   assert(MI && "AsmPrinter didn't require GCModuleInfo?");
+
+  if (TAI->hasSingleParameterDotFile()) {
+    /* Very minimal debug info. It is ignored if we emit actual
+       debug info. If we don't, this at helps the user find where
+       a function came from. */
+    O << "\t.file\t\"" << M.getModuleIdentifier() << "\"\n";
+  }
+
   for (GCModuleInfo::iterator I = MI->begin(), E = MI->end(); I != E; ++I)
     if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*I))
       MP->beginAssembly(O, *this, *TAI);
diff --git a/lib/Target/ARM/ARMTargetAsmInfo.cpp b/lib/Target/ARM/ARMTargetAsmInfo.cpp
index aae3712fb1..e0c81d61cb 100644
--- a/lib/Target/ARM/ARMTargetAsmInfo.cpp
+++ b/lib/Target/ARM/ARMTargetAsmInfo.cpp
@@ -61,6 +61,7 @@ ARMDarwinTargetAsmInfo::ARMDarwinTargetAsmInfo(const ARMTargetMachine &TM):
   JumpTableDataSection = ".const";
   CStringSection = "\t.cstring";
   HasDotTypeDotSizeDirective = false;
+  HasSingleParameterDotFile = false;
   NeedsIndirectEncoding = true;
   if (TM.getRelocationModel() == Reloc::Static) {
     StaticCtorsSection = ".constructor";
diff --git a/lib/Target/PowerPC/PPCTargetAsmInfo.cpp b/lib/Target/PowerPC/PPCTargetAsmInfo.cpp
index f8642b2a44..4151064c6a 100644
--- a/lib/Target/PowerPC/PPCTargetAsmInfo.cpp
+++ b/lib/Target/PowerPC/PPCTargetAsmInfo.cpp
@@ -37,6 +37,7 @@ PPCDarwinTargetAsmInfo::PPCDarwinTargetAsmInfo(const PPCTargetMachine &TM):
     StaticCtorsSection = ".mod_init_func";
     StaticDtorsSection = ".mod_term_func";
   }
+  HasSingleParameterDotFile = false;
   SwitchToSectionDirective = "\t.section ";
   UsedDirective = "\t.no_dead_strip\t";
   WeakDefDirective = "\t.weak_definition ";
diff --git a/lib/Target/TargetAsmInfo.cpp b/lib/Target/TargetAsmInfo.cpp
index a124922e6c..d79652ac56 100644
--- a/lib/Target/TargetAsmInfo.cpp
+++ b/lib/Target/TargetAsmInfo.cpp
@@ -85,6 +85,7 @@ void TargetAsmInfo::fillDefaultValues() {
   COMMDirective = "\t.comm\t";
   COMMDirectiveTakesAlignment = true;
   HasDotTypeDotSizeDirective = true;
+  HasSingleParameterDotFile = true;
   UsedDirective = 0;
   WeakRefDirective = 0;
   WeakDefDirective = 0;
diff --git a/lib/Target/X86/X86TargetAsmInfo.cpp b/lib/Target/X86/X86TargetAsmInfo.cpp
index abb05260cb..feff9307be 100644
--- a/lib/Target/X86/X86TargetAsmInfo.cpp
+++ b/lib/Target/X86/X86TargetAsmInfo.cpp
@@ -69,6 +69,7 @@ X86DarwinTargetAsmInfo::X86DarwinTargetAsmInfo(const X86TargetMachine &TM):
   // Leopard and above support aligned common symbols.
   COMMDirectiveTakesAlignment = (Subtarget->getDarwinVers() >= 9);
   HasDotTypeDotSizeDirective = false;
+  HasSingleParameterDotFile = false;
   if (TM.getRelocationModel() == Reloc::Static) {
     StaticCtorsSection = ".constructor";
     StaticDtorsSection = ".destructor";
@@ -221,6 +222,7 @@ X86COFFTargetAsmInfo::X86COFFTargetAsmInfo(const X86TargetMachine &TM):
   LCOMMDirective = "\t.lcomm\t";
   COMMDirectiveTakesAlignment = false;
   HasDotTypeDotSizeDirective = false;
+  HasSingleParameterDotFile = false;
   StaticCtorsSection = "\t.section .ctors,\"aw\"";
   StaticDtorsSection = "\t.section .dtors,\"aw\"";
   HiddenDirective = NULL;
@@ -335,6 +337,7 @@ X86WinTargetAsmInfo::X86WinTargetAsmInfo(const X86TargetMachine &TM):
   Data32bitsDirective = "\tdd\t";
   Data64bitsDirective = "\tdq\t";
   HasDotTypeDotSizeDirective = false;
+  HasSingleParameterDotFile = false;
 
   TextSection = getUnnamedSection("_text", SectionFlags::Code);
   DataSection = getUnnamedSection("_data", SectionFlags::Writeable);