[llvm-commits] [llvm-gcc-4.2] r67711 - /llvm-gcc-4.2/trunk/gcc/llvm-backend.cpp

[Dale Johannesen]

Author: johannes
Date: Wed Mar 25 17:26:09 2009
New Revision: 67711

URL: http://llvm.org/viewvc/llvm-project?rev=67711&view=rev
Log:
For now, don't emit global variable debug info when
optimization is on; this affects some optimizations.


Modified:
    llvm-gcc-4.2/trunk/gcc/llvm-backend.cpp

Modified: llvm-gcc-4.2/trunk/gcc/llvm-backend.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm-gcc-4.2/trunk/gcc/llvm-backend.cpp?rev=67711&r1=67710&r2=67711&view=diff

==============================================================================
--- llvm-gcc-4.2/trunk/gcc/llvm-backend.cpp (original)
+++ llvm-gcc-4.2/trunk/gcc/llvm-backend.cpp Wed Mar 25 17:26:09 2009
@@ -1364,7 +1364,10 @@
 #endif
   }
 
-  if (TheDebugInfo) TheDebugInfo->EmitGlobalVariable(GV, decl); 
+  // No debug info for globals when optimization is on.  While this is
+  // something that would be accurate and useful to a user, it currently
+  // affects some optimizations that, e.g., count uses.
+  if (TheDebugInfo && !optimize) TheDebugInfo->EmitGlobalVariable(GV, decl); 
 
   TREE_ASM_WRITTEN(decl) = 1;
   timevar_pop(TV_LLVM_GLOBALS);