re PR target/32086 (10% to 20% Performance Regression Between 4.1.3 and 4.3)

2007-12-10  Paolo Bonzini  <bonzini@gnu.org>

	PR target/32086
	* config/i386/i386.c (override_options): Enable -fvect-cost-model.

2007-12-10  Paolo Bonzini  <bonzini@gnu.org>

	PR target/32086
	* gcc.dg/vect/vect.exp (DEFAULT_VECTCFLAGS): Disable cost model.
	* g++.dg/vect/vect.exp (DEFAULT_VECTCFLAGS): Disable cost model.
	* gfortran.dg/vect/vect.exp (DEFAULT_VECTCFLAGS): Disable cost model.

From-SVN: r130738

gcc/ChangeLog

+2007-12-10  Paolo Bonzini  <bonzini@gnu.org>
+
+	PR target/32086
+	* config/i386/i386.c (override_options): Enable -fvect-cost-model.
+
 2007-12-10 Uros Bizjak <ubizjak@gmail.com>
 
 	* config/i386/i386.c (ix86_function_regparm): Ditto. Use REGPARM_MAX

gcc/config/i386/i386.c

@@ -2933,6 +2933,7 @@ optimization_options (int level, int size ATTRIBUTE_UNUSED)
     flag_omit_frame_pointer = 2;
   flag_pcc_struct_return = 2;
   flag_asynchronous_unwind_tables = 2;
+  flag_vect_cost_model = 1;
 #ifdef SUBTARGET_OPTIMIZATION_OPTIONS
   SUBTARGET_OPTIMIZATION_OPTIONS;
 #endif

gcc/testsuite/ChangeLog

+2007-12-10  Paolo Bonzini  <bonzini@gnu.org>
+
+	PR target/32086
+	* gcc.dg/vect/vect.exp (DEFAULT_VECTCFLAGS): Disable cost model.
+	* g++.dg/vect/vect.exp (DEFAULT_VECTCFLAGS): Disable cost model.
+	* gfortran.dg/vect/vect.exp (DEFAULT_VECTCFLAGS): Disable cost model.
+
 2007-12-09  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c++/34178

gcc/testsuite/g++.dg/vect/vect.exp

@@ -39,7 +39,7 @@ set save-dg-do-what-default ${dg-do-what-default}
 set DEFAULT_VECTCFLAGS ""
 
 # These flags are used for all targets.
-lappend DEFAULT_VECTCFLAGS "-O2" "-ftree-vectorize" \
+lappend DEFAULT_VECTCFLAGS "-O2" "-ftree-vectorize" "-fno-vect-cost-model" \
   "-ftree-vectorizer-verbose=4" "-fdump-tree-vect-stats"
 
 # Skip these tests for targets that do not support generating vector

gcc/testsuite/gcc.dg/vect/vect.exp

@@ -23,7 +23,7 @@ load_lib gcc-dg.exp
 set DEFAULT_VECTCFLAGS ""
 
 # These flags are used for all targets.
-lappend DEFAULT_VECTCFLAGS "-ftree-vectorize"
+lappend DEFAULT_VECTCFLAGS "-ftree-vectorize" "-fno-vect-cost-model"
 
 # If the target system supports vector instructions, the default action
 # for a test is 'run', otherwise it's 'compile'.  Save current default.

gcc/testsuite/gfortran.dg/vect/vect.exp

@@ -24,7 +24,7 @@ load_lib target-supports.exp
 set DEFAULT_VECTCFLAGS ""
 
 # These flags are used for all targets.
-lappend DEFAULT_VECTCFLAGS "-O2" "-ftree-vectorize" \
+lappend DEFAULT_VECTCFLAGS "-O2" "-ftree-vectorize" "-fno-vect-cost-model" \
   "-ftree-vectorizer-verbose=4" "-fdump-tree-vect-stats"
 
 # If the target system supports vector instructions, the default action