re PR tree-optimization/48497 (gfortran.dg/graphite/vect-pr40979.f90 FAILs without -march=pentium4)

	gcc:
	PR tree-optimization/48497
	* doc/sourcebuild.texi (Directives, dg-additional-options): Document.

	gcc/testsuite:
	PR tree-optimization/48497
	* lib/gcc-defs.exp (dg-additional-options): New proc.
	* gfortran.dg/graphite/vect-pr40979.f90: Use dg-additional-options
	-msse2 on 32-bit x86.

From-SVN: r174759

gcc/ChangeLog

+2011-06-07  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
+
+	PR tree-optimization/48497
+	* doc/sourcebuild.texi (Directives, dg-additional-options): Document.
+
 2011-06-07  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>
 
 	PR tree-optimization/46728

gcc/doc/sourcebuild.texi

@@ -1016,6 +1016,11 @@ This directive does nothing on targets that enable the features by
 default, or that don't provide them at all.  It must come after
 all @code{dg-options} directives.
 For supported values of @var{feature} see @ref{Add Options, ,}.
+
+@item @{ dg-additional-options @var{options} [@{ target @var{selector} @}] @}
+This directive provides a list of compiler options, to be used
+if the target system matches @var{selector}, that are added to the default
+options used for this set of tests.
 @end table
 
 @subsubsection Modify the test timeout value

gcc/testsuite/ChangeLog

+2011-06-07  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
+
+	gcc/testsuite:
+	PR tree-optimization/48497
+	* lib/gcc-defs.exp (dg-additional-options): New proc.
+	* gfortran.dg/graphite/vect-pr40979.f90: Use dg-additional-options
+	-msse2 on 32-bit x86.
+
 2011-06-06  Jason Merrill  <jason@redhat.com>
 
 	* g++.dg/cpp0x/enum19.C: New.

gcc/testsuite/gfortran.dg/graphite/vect-pr40979.f90

 ! { dg-do compile }
 ! { dg-require-effective-target vect_double }
+! { dg-additional-options "-msse2" { target { { i?86-*-* x86_64-*-* } && ilp32 } } }
 
 module mqc_m
 integer, parameter, private :: longreal = selected_real_kind(15,90)

gcc/testsuite/lib/gcc-defs.exp

@@ -183,6 +183,28 @@ if { [info procs runtest_file_p] == "" } then {
     }
 }
 
+# Like dg-options, but adds to the default options rather than replacing them.
+
+proc dg-additional-options { args } {
+    upvar dg-extra-tool-flags extra-tool-flags
+
+    if { [llength $args] > 3 } {
+	error "[lindex $args 0]: too many arguments"
+	return
+    }
+
+    if { [llength $args] >= 3 } {
+	switch [dg-process-target [lindex $args 2]] {
+	    "S" { eval lappend extra-tool-flags [lindex $args 1] }
+	    "N" { }
+	    "F" { error "[lindex $args 0]: `xfail' not allowed here" }
+	    "P" { error "[lindex $args 0]: `xfail' not allowed here" }
+	}
+    } else {
+	eval lappend extra-tool-flags [lindex $args 1]
+    }
+}
+
 # Record additional sources files that must be compiled along with the
 # main source file.