re PR middle-end/39701 (Revision 145846 caused many test failures)

2009-04-10  H.J. Lu  <hongjiu.lu@intel.com>

	PR middle-end/39701
	* common.opt (-fdelete-null-pointer-checks): Initialize to 1.

	* opts.c (decode_options): Don't set flag_delete_null_pointer_checks
	here.

	* doc/invoke.texi: Update -fdelete-null-pointer-checks.

From-SVN: r145937

gcc/ChangeLog

+2009-04-10  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR middle-end/39701
+	* common.opt (-fdelete-null-pointer-checks): Initialize to 1.
+
+	* opts.c (decode_options): Don't set flag_delete_null_pointer_checks
+	here.
+
+	* doc/invoke.texi: Update -fdelete-null-pointer-checks.
+
 2009-04-10  Chao-ying Fu  <fu@mips.com>
 
 	* doc/tm.texi (Instruction Output): Document

gcc/common.opt

@@ -436,7 +436,7 @@ Common Report Var(flag_delayed_branch) Optimization
 Attempt to fill delay slots of branch instructions
 
 fdelete-null-pointer-checks
-Common Report Var(flag_delete_null_pointer_checks) Optimization
+Common Report Var(flag_delete_null_pointer_checks) Init(1) Optimization
 Delete useless null pointer checks
 
 fdiagnostics-show-location=

gcc/doc/invoke.texi

@@ -5898,7 +5898,7 @@ safely dereference null pointers.  Use
 @option{-fno-delete-null-pointer-checks} to disable this optimization
 for programs which depend on that behavior.
 
-Enabled at levels @option{-O2}, @option{-O3}, @option{-Os}.
+Enabled by default.
 
 @item -fexpensive-optimizations
 @opindex fexpensive-optimizations

gcc/opts.c

@@ -894,7 +894,6 @@ decode_options (unsigned int argc, const char **argv)
   flag_regmove = opt2;
   flag_strict_aliasing = opt2;
   flag_strict_overflow = opt2;
-  flag_delete_null_pointer_checks = opt2;
   flag_reorder_blocks = opt2;
   flag_reorder_functions = opt2;
   flag_tree_vrp = opt2;