MIPS: Check for sysroot support when upgrading/downgrading test options

gcc/testsuite/

	* gcc.target/mips/inline-memcpy-1.c (dg-options): Add
	(REQUIRES_STDLIB).
	* gcc.target/mips/inline-memcpy-2.c: Ditto.
	* gcc.target/mips/inline-memcpy-3.c: Ditto.
	* gcc.target/mips/inline-memcpy-4.c: Ditto.
	* gcc.target/mips/inline-memcpy-5.c: Ditto.
	* gcc.target/mips/loongson-shift-count-truncated-1.c: Ditto.
	* gcc.target/mips/loongson-simd.c: Ditto.
	* gcc.target/mips/memcpy-1.c: Ditto.
	* gcc.target/mips/mips-3d-1.c: Ditto.
	* gcc.target/mips/mips-3d-2.c: Ditto.
	* gcc.target/mips/mips-3d-3.c: Ditto.
	* gcc.target/mips/mips-3d-4.c: Ditto.
	* gcc.target/mips/mips-3d-5.c: Ditto.
	* gcc.target/mips/mips-3d-6.c: Ditto.
	* gcc.target/mips/mips-3d-7.c: Ditto.
	* gcc.target/mips/mips-3d-8.c: Ditto.
	* gcc.target/mips/mips-3d-9.c: Ditto.
	* gcc.target/mips/mips-ps-1.c: Ditto.
	* gcc.target/mips/mips-ps-2.c: Ditto.
	* gcc.target/mips/mips-ps-3.c: Ditto.
	* gcc.target/mips/mips-ps-4.c: Ditto.
	* gcc.target/mips/mips-ps-6.c: Ditto.
	* gcc.target/mips/mips16-attributes.c: Ditto.
	* gcc.target/mips/mips32-dsp-run.c: Ditto.
	* gcc.target/mips/mips32-dsp.c: Ditto.
	* gcc.target/mips/save-restore-1.c: Ditto.
	* gcc.target/mips/mips.exp (mips_option_groups): Add stdlib.
	(mips_preprocess): Add ignore_output argument that when set
	will not return the pre-processed output.
	(mips_arch_info): Update arguments for the call to
	mips_preprocess.
	(mips-dg-init): Ditto.
	(mips-dg-options): Check if a test having test option
	(REQUIRES_STDLIB) has the required sysroot support for
	the current test options.

Co-Authored-By: Toma Tabacu <toma.tabacu@imgtec.com>

From-SVN: r242587

gcc/testsuite/ChangeLog

+2016-11-18  Andrew Bennett  <andrew.bennett@imgtec.com>
+	    Toma Tabacu  <toma.tabacu@imgtec.com>
+
+	* gcc.target/mips/inline-memcpy-1.c (dg-options): Add
+	(REQUIRES_STDLIB).
+	* gcc.target/mips/inline-memcpy-2.c: Ditto.
+	* gcc.target/mips/inline-memcpy-3.c: Ditto.
+	* gcc.target/mips/inline-memcpy-4.c: Ditto.
+	* gcc.target/mips/inline-memcpy-5.c: Ditto.
+	* gcc.target/mips/loongson-shift-count-truncated-1.c: Ditto.
+	* gcc.target/mips/loongson-simd.c: Ditto.
+	* gcc.target/mips/memcpy-1.c: Ditto.
+	* gcc.target/mips/mips-3d-1.c: Ditto.
+	* gcc.target/mips/mips-3d-2.c: Ditto.
+	* gcc.target/mips/mips-3d-3.c: Ditto.
+	* gcc.target/mips/mips-3d-4.c: Ditto.
+	* gcc.target/mips/mips-3d-5.c: Ditto.
+	* gcc.target/mips/mips-3d-6.c: Ditto.
+	* gcc.target/mips/mips-3d-7.c: Ditto.
+	* gcc.target/mips/mips-3d-8.c: Ditto.
+	* gcc.target/mips/mips-3d-9.c: Ditto.
+	* gcc.target/mips/mips-ps-1.c: Ditto.
+	* gcc.target/mips/mips-ps-2.c: Ditto.
+	* gcc.target/mips/mips-ps-3.c: Ditto.
+	* gcc.target/mips/mips-ps-4.c: Ditto.
+	* gcc.target/mips/mips-ps-6.c: Ditto.
+	* gcc.target/mips/mips16-attributes.c: Ditto.
+	* gcc.target/mips/mips32-dsp-run.c: Ditto.
+	* gcc.target/mips/mips32-dsp.c: Ditto.
+	* gcc.target/mips/save-restore-1.c: Ditto.
+	* gcc.target/mips/mips.exp (mips_option_groups): Add stdlib.
+	(mips_preprocess): Add ignore_output argument that when set
+	will not return the pre-processed output.
+	(mips_arch_info): Update arguments for the call to
+	mips_preprocess.
+	(mips-dg-init): Ditto.
+	(mips-dg-options): Check if a test having test option
+	(REQUIRES_STDLIB) has the required sysroot support for
+	the current test options.
+
 2016-11-17  Jeff Law  <law@redhat.com>
 
 	PR middle-end/38219

gcc/testsuite/gcc.target/mips/inline-memcpy-1.c

-/* { dg-options "-fno-common isa_rev>=6" } */
+/* { dg-options "-fno-common isa_rev>=6 (REQUIRES_STDLIB)" } */
 /* { dg-skip-if "code quality test" { *-*-* } { "-O0" "-Os" } { "" } } */
 /* { dg-final { scan-assembler-not "\tmemcpy" } } */
 

gcc/testsuite/gcc.target/mips/inline-memcpy-2.c

-/* { dg-options "-fno-common isa_rev>=6" } */
+/* { dg-options "-fno-common isa_rev>=6 (REQUIRES_STDLIB)" } */
 /* { dg-skip-if "code quality test" { *-*-* } { "-O0" "-Os"} { "" } } */
 /* { dg-final { scan-assembler-not "\tmemcpy" } } */
 /* { dg-final { scan-assembler-times "\tsh\t" 16 } } */

gcc/testsuite/gcc.target/mips/inline-memcpy-3.c

-/* { dg-options "-fno-common isa_rev<=5" } */
+/* { dg-options "-fno-common isa_rev<=5 (REQUIRES_STDLIB)" } */
 /* { dg-skip-if "code quality test" { *-*-* } { "-O0" "-Os"} { "" } } */
 /* { dg-final { scan-assembler-not "\tmemcpy" } } */
 /* { dg-final { scan-assembler-times "swl" 8 } } */

gcc/testsuite/gcc.target/mips/inline-memcpy-4.c

-/* { dg-options "-fno-common isa_rev<=5 -mabi=64" } */
+/* { dg-options "-fno-common isa_rev<=5 -mabi=64 (REQUIRES_STDLIB)" } */
 /* { dg-skip-if "code quality test" { *-*-* } { "-O0" "-Os"} { "" } } */
 /* { dg-final { scan-assembler-not "\tmemcpy" } } */
 /* { dg-final { scan-assembler-times "sdl" 4 } } */

gcc/testsuite/gcc.target/mips/inline-memcpy-5.c

-/* { dg-options "-fno-common isa_rev<=5 -mabi=n32" } */
+/* { dg-options "-fno-common isa_rev<=5 -mabi=n32 (REQUIRES_STDLIB)" } */
 /* { dg-skip-if "code quality test" { *-*-* } { "-O0" "-Os"} { "" } } */
 /* { dg-final { scan-assembler-not "\tmemcpy" } } */
 /* { dg-final { scan-assembler-times "sdl" 4 } } */

gcc/testsuite/gcc.target/mips/loongson-shift-count-truncated-1.c

@@ -4,7 +4,7 @@
 /* loongson.h does not handle or check for MIPS16ness.  There doesn't
    seem any good reason for it to, given that the Loongson processors
    do not support MIPS16.  */
-/* { dg-options "isa=loongson -mhard-float -mno-mips16" } */
+/* { dg-options "isa=loongson -mhard-float -mno-mips16 (REQUIRES_STDLIB)" } */
 /* See PR 52155.  */
 /* { dg-options "isa=loongson -mhard-float -mno-mips16 -mlong64" { mips*-*-elf* && ilp32 } } */
 

gcc/testsuite/gcc.target/mips/loongson-simd.c

@@ -26,7 +26,7 @@ along with GCC; see the file COPYING3.  If not see
    because inclusion of some system headers e.g. stdint.h will fail due to not
    finding stubs-o32_hard.h.  */
 /* { dg-require-effective-target mips_nanlegacy } */
-/* { dg-options "isa=loongson -mhard-float -mno-micromips -mno-mips16 -flax-vector-conversions" } */
+/* { dg-options "isa=loongson -mhard-float -mno-micromips -mno-mips16 -flax-vector-conversions (REQUIRES_STDLIB)" } */
 
 #include "loongson.h"
 #include <stdio.h>

gcc/testsuite/gcc.target/mips/memcpy-1.c

-/* { dg-options "-fno-common" } */
+/* { dg-options "-fno-common (REQUIRES_STDLIB)" } */
 /* { dg-skip-if "code quality test" { *-*-* } { "-O0" } { "" } } */
 /* { dg-final { scan-assembler-not "\tlbu\t" } } */
 

gcc/testsuite/gcc.target/mips/mips-3d-1.c

 /* { dg-do run } */
-/* { dg-options "-mips3d forbid_cpu=octeon.*" } */
+/* { dg-options "-mips3d forbid_cpu=octeon.* (REQUIRES_STDLIB)" } */
 
 /* Test MIPS-3D builtin functions */
 #include <stdlib.h>

gcc/testsuite/gcc.target/mips/mips-3d-2.c

 /* { dg-do run } */
-/* { dg-options "-mips3d forbid_cpu=octeon.*" } */
+/* { dg-options "-mips3d forbid_cpu=octeon.* (REQUIRES_STDLIB)" } */
 
 /* Test MIPS-3D branch-if-any-two builtin functions */
 #include <stdlib.h>

gcc/testsuite/gcc.target/mips/mips-3d-3.c

 /* { dg-do run } */
-/* { dg-options "-mips3d forbid_cpu=octeon.*" } */
+/* { dg-options "-mips3d forbid_cpu=octeon.* (REQUIRES_STDLIB)" } */
 
 /* Test MIPS-3D absolute compare builtin functions */
 #include <stdlib.h>

gcc/testsuite/gcc.target/mips/mips-3d-4.c

 /* { dg-do run } */
-/* { dg-options "-mips3d forbid_cpu=octeon.*" } */
+/* { dg-options "-mips3d forbid_cpu=octeon.* (REQUIRES_STDLIB)" } */
 
 /* Test MIPS-3D branch-if-any-four builtin functions */
 #include <stdlib.h>

gcc/testsuite/gcc.target/mips/mips-3d-5.c

 /* { dg-do run } */
-/* { dg-options "-mips3d forbid_cpu=octeon.*" } */
+/* { dg-options "-mips3d forbid_cpu=octeon.* (REQUIRES_STDLIB)" } */
 
 /* Test MIPS-3D absolute-compare & branch-if-any-four builtin functions */
 #include <stdlib.h>

gcc/testsuite/gcc.target/mips/mips-3d-6.c

 /* { dg-do run } */
-/* { dg-options "-mips3d forbid_cpu=octeon.*" } */
+/* { dg-options "-mips3d forbid_cpu=octeon.* (REQUIRES_STDLIB)" } */
 
 /* Test MIPS-3D absolute compare (floats) builtin functions */
 #include <stdlib.h>

gcc/testsuite/gcc.target/mips/mips-3d-7.c

 /* { dg-do run } */
-/* { dg-options "-mips3d forbid_cpu=octeon.*" } */
+/* { dg-options "-mips3d forbid_cpu=octeon.* (REQUIRES_STDLIB)" } */
 
 /* Test MIPS-3D absolute compare (doubles) builtin functions */
 #include <stdlib.h>

gcc/testsuite/gcc.target/mips/mips-3d-8.c

 /* { dg-do run } */
-/* { dg-options "-mips3d forbid_cpu=octeon.*" } */
+/* { dg-options "-mips3d forbid_cpu=octeon.* (REQUIRES_STDLIB)" } */
 
 /* Test MIPS-3D absolute compare and conditional move builtin functions */
 #include <stdlib.h>

gcc/testsuite/gcc.target/mips/mips-3d-9.c

 /* { dg-do run } */
-/* { dg-options "-mips3d forbid_cpu=octeon.*" } */
+/* { dg-options "-mips3d forbid_cpu=octeon.* (REQUIRES_STDLIB)" } */
 
 /* Matrix Multiplications */
 #include <stdlib.h>

gcc/testsuite/gcc.target/mips/mips-ps-1.c

 /* { dg-do run } */
-/* { dg-options "-mpaired-single forbid_cpu=octeon.*" } */
+/* { dg-options "-mpaired-single forbid_cpu=octeon.* (REQUIRES_STDLIB)" } */
 
 /* Test v2sf calculations */
 #include <stdlib.h>

gcc/testsuite/gcc.target/mips/mips-ps-2.c

 /* { dg-do run } */
-/* { dg-options "-mpaired-single forbid_cpu=octeon.*" } */
+/* { dg-options "-mpaired-single forbid_cpu=octeon.* (REQUIRES_STDLIB)" } */
 
 /* Test MIPS paired-single builtin functions */
 #include <stdlib.h>

gcc/testsuite/gcc.target/mips/mips-ps-3.c

 /* { dg-do run } */
-/* { dg-options "-mpaired-single forbid_cpu=octeon.*" } */
+/* { dg-options "-mpaired-single forbid_cpu=octeon.* (REQUIRES_STDLIB)" } */
 
 /* Test MIPS paired-single conditional move */
 #include <stdlib.h>

gcc/testsuite/gcc.target/mips/mips-ps-4.c

 /* { dg-do run } */
-/* { dg-options "-mpaired-single forbid_cpu=octeon.*" } */
+/* { dg-options "-mpaired-single forbid_cpu=octeon.* (REQUIRES_STDLIB)" } */
 
 /* Test MIPS paired-single comparisons */
 #include <stdlib.h>

gcc/testsuite/gcc.target/mips/mips-ps-6.c

 /* mips-ps-2.c with an extra -ffinite-math-only option.  This option
    changes the way that abs.ps is handled.  */
 /* { dg-do run } */
-/* { dg-options "-mpaired-single -ffinite-math-only forbid_cpu=octeon.*" } */
+/* { dg-options "-mpaired-single -ffinite-math-only forbid_cpu=octeon.* (REQUIRES_STDLIB)" } */
 
 /* Test MIPS paired-single builtin functions */
 #include <stdlib.h>

gcc/testsuite/gcc.target/mips/mips.exp

@@ -261,6 +261,7 @@ set mips_option_groups {
     section_start "-Wl,--section-start=.*"
     frame-header "-mframe-header-opt|-mno-frame-header-opt"
     stack-protector "-fstack-protector"
+    stdlib "REQUIRES_STDLIB"
 }
 
 for { set option 0 } { $option < 32 } { incr option } {
@@ -447,14 +448,19 @@ proc mips_same_option_p { option1 option2 } {
 
 # Preprocess CODE using target_compile options OPTIONS.  Return the
 # compiler output.
-proc mips_preprocess { options code } {
+proc mips_preprocess { options code ignore_output } {
     global tool
 
     set src dummy[pid].c
     set f [open $src "w"]
     puts $f $code
     close $f
-    set output [${tool}_target_compile $src "" preprocess $options]
+    if { $ignore_output } {
+	set output [${tool}_target_compile $src dummy[pid].i preprocess $options]
+	file delete dummy[pid].i
+    } else {
+	set output [${tool}_target_compile $src "" preprocess $options]
+    }
     file delete $src
 
     return $output
@@ -504,7 +510,7 @@ proc mips_arch_info { arch prop } {
 	    #else
 	    int isa_rev = 0;
 	    #endif
-	}]
+	} 0]
 	foreach lhs { isa isa_rev } {
 	    regsub ".*$lhs = (\[^;\]*).*" $output {\1} rhs
 	    verbose -log "Architecture $arch has $lhs $rhs"
@@ -863,7 +869,7 @@ proc mips-dg-init {} {
 
 	    0
 	};
-    }]
+    } 0]
     foreach line [split $output "\r\n"] {
 	# Poor man's string concatenation.
 	regsub -all {" "} $line "" line
@@ -1454,6 +1460,28 @@ proc mips-dg-options { args } {
 	}
     }
 
+    # If the test is marked as requiring standard libraries check
+    # that the sysroot has support for the current set of test options.
+    if { [mips_have_test_option_p options "REQUIRES_STDLIB"] } {
+	mips_push_test_options saved_options $extra_tool_flags
+	set output [mips_preprocess "" {
+	      #include <stdlib.h>
+	} 1]
+	mips_pop_test_options saved_options
+
+	# If the preprocessing of the stdlib.h file produced errors,
+	# mark the test as unsupported by changing the second element of
+	# do_what to "N".
+	# The second element of do_what holds information about test selection
+	# and it can have one of two values:
+	# "S" - the test is selected and will be run
+	# "N" - the test is not selected and will not be run
+	# This mirrors the format of dg-do-what from lib/dg.exp in DejaGNU.
+	if { ![string equal $output ""] } {
+	    set do_what [lreplace $do_what 1 1 "N"]
+	}
+    }
+
     # If the test is MIPS16-compatible, provide a counterpart to the
     # NOMIPS16 convenience macro.
     if { [mips_have_test_option_p options "-mips16"] } {

gcc/testsuite/gcc.target/mips/mips16-attributes.c

@@ -2,7 +2,7 @@
    of calling a nomips16/mips16/default function from a nomips16/mips16/default
    function.  */
 /* { dg-do run } */
-/* { dg-options "(-mips16)" } */
+/* { dg-options "(-mips16) (REQUIRES_STDLIB)" } */
 /* { dg-skip-if "" { *-*-* } { "-mmicromips" } { "" } } */
 
 #include <stdlib.h>

gcc/testsuite/gcc.target/mips/mips32-dsp-run.c

 /* Test MIPS32 DSP instructions */
 /* { dg-do run } */
-/* { dg-options "-mdsp" } */
+/* { dg-options "-mdsp (REQUIRES_STDLIB)" } */
 
 #include <stdlib.h>
 #include <stdio.h>

gcc/testsuite/gcc.target/mips/mips32-dsp.c

 /* Test MIPS32 DSP instructions */
 /* { dg-do compile } */
-/* { dg-options "-mgp32 -mdsp" } */
+/* { dg-options "-mgp32 -mdsp (REQUIRES_STDLIB)" } */
 /* { dg-final { scan-assembler "\taddq.ph\t" } } */
 /* { dg-final { scan-assembler "\taddq_s.ph\t" } } */
 /* { dg-final { scan-assembler "\taddq_s.w\t" } } */

gcc/testsuite/gcc.target/mips/save-restore-1.c

 /* Check that we can use the save instruction to save varargs.  */
-/* { dg-options "(-mips16) isa_rev>=1 -mabi=32" } */
+/* { dg-options "(-mips16) isa_rev>=1 -mabi=32 (REQUIRES_STDLIB)" } */
 
 #include <stdarg.h>