[llvm-commits] [llvm-gcc-4.2] r130139 - in /llvm-gcc-4.2/trunk/gcc: llvm-backend.cpp opts.c

[Evan Cheng]

Author: evancheng
Date: Mon Apr 25 15:04:03 2011
New Revision: 130139

URL: http://llvm.org/viewvc/llvm-project?rev=130139&view=rev
Log:
Currently -Os and -Oz are the same. Change -Oz to significantly reduce inline threshold to make it useful for code that really cares about code size.

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

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=130139&r1=130138&r2=130139&view=diff
==============================================================================
--- llvm-gcc-4.2/trunk/gcc/llvm-backend.cpp (original)
+++ llvm-gcc-4.2/trunk/gcc/llvm-backend.cpp Mon Apr 25 15:04:03 2011
@@ -81,6 +81,9 @@
 #endif
 }
 
+// Non-zero if -Oz is set.
+extern "C" unsigned int optimize_size_z;
+
 // Non-zero if bytecode from PCH is successfully read.
 int flag_llvm_pch_read;
 
@@ -387,7 +390,7 @@
 static unsigned GuessAtInliningThreshold() {
   if (optimize_size)
     // Reduce inline limit.
-    return 75;
+    return optimize_size_z ? 25 : 75;
   
   if (optimize >= 3)
     return 275;

Modified: llvm-gcc-4.2/trunk/gcc/opts.c
URL: http://llvm.org/viewvc/llvm-project/llvm-gcc-4.2/trunk/gcc/opts.c?rev=130139&r1=130138&r2=130139&view=diff
==============================================================================
--- llvm-gcc-4.2/trunk/gcc/opts.c (original)
+++ llvm-gcc-4.2/trunk/gcc/opts.c Mon Apr 25 15:04:03 2011
@@ -43,6 +43,11 @@
 #include "hashtab.h"
 #include "tree-pass.h"
 
+#ifdef ENABLE_LLVM
+/* Non-zero if -Oz is specified. */
+unsigned int optimize_size_z;
+#endif  
+
 /* Value of the -G xx switch, and whether it was passed or not.  */
 unsigned HOST_WIDE_INT g_switch_value;
 bool g_switch_set;
@@ -590,10 +595,16 @@
 {
   unsigned int i, lang_mask;
   /* APPLE LOCAL 4231773 */
+#ifndef ENABLE_LLVM
   unsigned int optimize_size_z = 0;
+#endif  
   /* APPLE LOCAL AV 3846092 */
   int saved_flag_strict_aliasing;
 
+#ifdef ENABLE_LLVM
+  optimize_size_z = 0;
+#endif
+
   /* Perform language-specific options initialization.  */
   lang_mask = lang_hooks.init_options (argc, argv);