Update DebugInfo interface to use metadata, instead of special named llvm.dbg.... global variables, to encode debugging information in llvm IR. This is mostly a mechanical change that tests metadata support very well.

This change speeds up llvm-gcc by more then 6% at "-O0 -g" (measured by compiling InstructionCombining.cpp!)

llvm-svn: 79977

1 files changed, 8 insertions, 10 deletions

diff --git a/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
index c8099c8b188..23f62dba2c1 100644
--- a/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
@@ -1739,11 +1739,10 @@ void AsmPrinter::EmitComments(const MachineInstr &MI) const {
   // Print source line info.
   O.PadToColumn(MAI->getCommentColumn());
   O << MAI->getCommentString() << " SrcLine ";
-  if (DLT.CompileUnit->hasInitializer()) {
-    Constant *Name = DLT.CompileUnit->getInitializer();
-    if (ConstantArray *NameString = dyn_cast<ConstantArray>(Name))
-      if (NameString->isString())
-        O << NameString->getAsString() << " ";
+  if (DLT.CompileUnit) {
+    std::string Str;
+    DICompileUnit CU(DLT.CompileUnit);
+    O << CU.getFilename(Str) << " ";
   }
   O << DLT.Line;
   if (DLT.Col != 0) 
@@ -1761,11 +1760,10 @@ void AsmPrinter::EmitComments(const MCInst &MI) const {
   // Print source line info
   O.PadToColumn(MAI->getCommentColumn());
   O << MAI->getCommentString() << " SrcLine ";
-  if (DLT.CompileUnit->hasInitializer()) {
-    Constant *Name = DLT.CompileUnit->getInitializer();
-    if (ConstantArray *NameString = dyn_cast<ConstantArray>(Name))
-      if (NameString->isString())
-        O << NameString->getAsString() << " ";
+  if (DLT.CompileUnit) {
+    std::string Str;
+    DICompileUnit CU(DLT.CompileUnit);
+    O << CU.getFilename(Str) << " ";
   }
   O << DLT.Line;
   if (DLT.Col != 0)