[llvm-commits] [llvm] r86695 - /llvm/trunk/lib/Target/X86/X86ISelDAGToDAG.cpp

[Daniel Dunbar]

Author: ddunbar
Date: Tue Nov 10 12:24:37 2009
New Revision: 86695

URL: http://llvm.org/viewvc/llvm-project?rev=86695&view=rev
Log:
Add a monstrous hack to improve X86ISelDAGToDAG compile time.
 - Force NDEBUG on in any Release build. This drops the compile time to ~100s
   from ~600s, in Release mode.

 - This may just be a temporary workaround, I don't know the true nature of the
   gcc-4.2 compile time performance problem.

Modified:
    llvm/trunk/lib/Target/X86/X86ISelDAGToDAG.cpp

Modified: llvm/trunk/lib/Target/X86/X86ISelDAGToDAG.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86ISelDAGToDAG.cpp?rev=86695&r1=86694&r2=86695&view=diff

==============================================================================
--- llvm/trunk/lib/Target/X86/X86ISelDAGToDAG.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86ISelDAGToDAG.cpp Tue Nov 10 12:24:37 2009
@@ -12,6 +12,14 @@
 //
 //===----------------------------------------------------------------------===//
 
+// Force NDEBUG on in any optimized build on Darwin.
+//
+// FIXME: This is a huge hack, to work around ridiculously awful compile times
+// on this file with gcc-4.2 on Darwin, in Release mode.
+#if defined(__APPLE__) && defined(__OPTIMIZE__) && !defined(NDEBUG)
+#define NDEBUG
+#endif
+
 #define DEBUG_TYPE "x86-isel"
 #include "X86.h"
 #include "X86InstrBuilder.h"