Handle Octeon 3 not supporting MIPS paired-single instructions.

The Octeon 3 processor does not support the MIPS paired-single
instructions.  This results in illegal instruction errors in the
testsuite when vectorization tests try to use those instructions.

This patch teaches the compiler about that lack of support, so that
warnings are given when -mpaired-single (or something implying it) is
used when compiling for such a processor.  I chose to test
TARGET_OCTEON as the simplest conditional; since the older Octeon
processors don't support hard float at all, I don't think the choice
matters for them.  Tests that then failed with the warning were
updated to disable them for Octeon.

Tested with no regressions for cross to mips64el-linux-gnu (Octeon
3).

gcc:
	* config/mips/mips.h (ISA_HAS_PAIRED_SINGLE): Require
	!TARGET_OCTEON.

gcc/testsuite:
	* gcc.target/mips/mips-3d-1.c: Use forbid_cpu=octeon.* in
	dg-options.
	* gcc.target/mips/mips-3d-2.c: Likewise.
	* gcc.target/mips/mips-3d-3.c: Likewise.
	* gcc.target/mips/mips-3d-4.c: Likewise.
	* gcc.target/mips/mips-3d-5.c: Likewise.
	* gcc.target/mips/mips-3d-6.c: Likewise.
	* gcc.target/mips/mips-3d-7.c: Likewise.
	* gcc.target/mips/mips-3d-8.c: Likewise.
	* gcc.target/mips/mips-3d-9.c: Likewise.
	* gcc.target/mips/mips-ps-1.c: Likewise.
	* gcc.target/mips/mips-ps-2.c: Likewise.
	* gcc.target/mips/mips-ps-3.c: Likewise.
	* gcc.target/mips/mips-ps-4.c: Likewise.
	* gcc.target/mips/mips-ps-5.c: Likewise.
	* gcc.target/mips/mips-ps-6.c: Likewise.
	* gcc.target/mips/mips-ps-7.c: Likewise.
	* gcc.target/mips/mips-ps-type.c: Likewise.
	* gcc.target/mips/mips-ps-type-2.c: Likewise.
	* gcc.target/mips/mips16-attributes-6.c: Likewise.

From-SVN: r232517

22 files changed, 51 insertions, 22 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index d011a4f..972ddec 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2016-01-18  Joseph Myers  <joseph@codesourcery.com>
+
+	* config/mips/mips.h (ISA_HAS_PAIRED_SINGLE): Require
+	!TARGET_OCTEON.
+
 2016-01-18  Richard Biener  <rguenther@suse.de>
 
 	PR middle-end/69308
diff --git a/gcc/config/mips/mips.h b/gcc/config/mips/mips.h
index 3097a41..803ab98 100644
--- a/gcc/config/mips/mips.h
+++ b/gcc/config/mips/mips.h
@@ -1014,9 +1014,10 @@ struct mips_cpu_info {
 #define ISA_HAS_LXC1_SXC1	ISA_HAS_FP4
 
 /* ISA has paired-single instructions.  */
-#define ISA_HAS_PAIRED_SINGLE	(ISA_MIPS64				\
-				 || (mips_isa_rev >= 2			\
-				     && mips_isa_rev <= 5))
+#define ISA_HAS_PAIRED_SINGLE	((ISA_MIPS64				\
+				  || (mips_isa_rev >= 2			\
+				      && mips_isa_rev <= 5))		\
+				 && !TARGET_OCTEON)
 
 /* ISA has conditional trap instructions.  */
 #define ISA_HAS_COND_TRAP	(!ISA_MIPS1				\
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 18c4f6c..050535f 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,26 @@
+2016-01-18  Joseph Myers  <joseph@codesourcery.com>
+
+	* gcc.target/mips/mips-3d-1.c: Use forbid_cpu=octeon.* in
+	dg-options.
+	* gcc.target/mips/mips-3d-2.c: Likewise.
+	* gcc.target/mips/mips-3d-3.c: Likewise.
+	* gcc.target/mips/mips-3d-4.c: Likewise.
+	* gcc.target/mips/mips-3d-5.c: Likewise.
+	* gcc.target/mips/mips-3d-6.c: Likewise.
+	* gcc.target/mips/mips-3d-7.c: Likewise.
+	* gcc.target/mips/mips-3d-8.c: Likewise.
+	* gcc.target/mips/mips-3d-9.c: Likewise.
+	* gcc.target/mips/mips-ps-1.c: Likewise.
+	* gcc.target/mips/mips-ps-2.c: Likewise.
+	* gcc.target/mips/mips-ps-3.c: Likewise.
+	* gcc.target/mips/mips-ps-4.c: Likewise.
+	* gcc.target/mips/mips-ps-5.c: Likewise.
+	* gcc.target/mips/mips-ps-6.c: Likewise.
+	* gcc.target/mips/mips-ps-7.c: Likewise.
+	* gcc.target/mips/mips-ps-type.c: Likewise.
+	* gcc.target/mips/mips-ps-type-2.c: Likewise.
+	* gcc.target/mips/mips16-attributes-6.c: Likewise.
+
 2016-01-18  Tom de Vries  <tom@codesourcery.com>
 
 	* c-c++-common/goacc/kernels-counter-vars-function-scope.c: New test.
diff --git a/gcc/testsuite/gcc.target/mips/mips-3d-1.c b/gcc/testsuite/gcc.target/mips/mips-3d-1.c
index f11ffc5..9c67513 100644
--- a/gcc/testsuite/gcc.target/mips/mips-3d-1.c
+++ b/gcc/testsuite/gcc.target/mips/mips-3d-1.c
@@ -1,5 +1,5 @@
 /* { dg-do run } */
-/* { dg-options "-mips3d" } */
+/* { dg-options "-mips3d forbid_cpu=octeon.*" } */
 
 /* Test MIPS-3D builtin functions */
 #include <stdlib.h>
diff --git a/gcc/testsuite/gcc.target/mips/mips-3d-2.c b/gcc/testsuite/gcc.target/mips/mips-3d-2.c
index b04c3bf..4da059f 100644
--- a/gcc/testsuite/gcc.target/mips/mips-3d-2.c
+++ b/gcc/testsuite/gcc.target/mips/mips-3d-2.c
@@ -1,5 +1,5 @@
 /* { dg-do run } */
-/* { dg-options "-mips3d" } */
+/* { dg-options "-mips3d forbid_cpu=octeon.*" } */
 
 /* Test MIPS-3D branch-if-any-two builtin functions */
 #include <stdlib.h>
diff --git a/gcc/testsuite/gcc.target/mips/mips-3d-3.c b/gcc/testsuite/gcc.target/mips/mips-3d-3.c
index e4de8fb..fcdcf24 100644
--- a/gcc/testsuite/gcc.target/mips/mips-3d-3.c
+++ b/gcc/testsuite/gcc.target/mips/mips-3d-3.c
@@ -1,5 +1,5 @@
 /* { dg-do run } */
-/* { dg-options "-mips3d" } */
+/* { dg-options "-mips3d forbid_cpu=octeon.*" } */
 
 /* Test MIPS-3D absolute compare builtin functions */
 #include <stdlib.h>
diff --git a/gcc/testsuite/gcc.target/mips/mips-3d-4.c b/gcc/testsuite/gcc.target/mips/mips-3d-4.c
index 3d28d7f..340921c 100644
--- a/gcc/testsuite/gcc.target/mips/mips-3d-4.c
+++ b/gcc/testsuite/gcc.target/mips/mips-3d-4.c
@@ -1,5 +1,5 @@
 /* { dg-do run } */
-/* { dg-options "-mips3d" } */
+/* { dg-options "-mips3d forbid_cpu=octeon.*" } */
 
 /* Test MIPS-3D branch-if-any-four builtin functions */
 #include <stdlib.h>
diff --git a/gcc/testsuite/gcc.target/mips/mips-3d-5.c b/gcc/testsuite/gcc.target/mips/mips-3d-5.c
index a433675..e7dbfeb 100644
--- a/gcc/testsuite/gcc.target/mips/mips-3d-5.c
+++ b/gcc/testsuite/gcc.target/mips/mips-3d-5.c
@@ -1,5 +1,5 @@
 /* { dg-do run } */
-/* { dg-options "-mips3d" } */
+/* { dg-options "-mips3d forbid_cpu=octeon.*" } */
 
 /* Test MIPS-3D absolute-compare & branch-if-any-four builtin functions */
 #include <stdlib.h>
diff --git a/gcc/testsuite/gcc.target/mips/mips-3d-6.c b/gcc/testsuite/gcc.target/mips/mips-3d-6.c
index e6b44f0..d75faa1 100644
--- a/gcc/testsuite/gcc.target/mips/mips-3d-6.c
+++ b/gcc/testsuite/gcc.target/mips/mips-3d-6.c
@@ -1,5 +1,5 @@
 /* { dg-do run } */
-/* { dg-options "-mips3d" } */
+/* { dg-options "-mips3d forbid_cpu=octeon.*" } */
 
 /* Test MIPS-3D absolute compare (floats) builtin functions */
 #include <stdlib.h>
diff --git a/gcc/testsuite/gcc.target/mips/mips-3d-7.c b/gcc/testsuite/gcc.target/mips/mips-3d-7.c
index 2531ddf..8e69d49 100644
--- a/gcc/testsuite/gcc.target/mips/mips-3d-7.c
+++ b/gcc/testsuite/gcc.target/mips/mips-3d-7.c
@@ -1,5 +1,5 @@
 /* { dg-do run } */
-/* { dg-options "-mips3d" } */
+/* { dg-options "-mips3d forbid_cpu=octeon.*" } */
 
 /* Test MIPS-3D absolute compare (doubles) builtin functions */
 #include <stdlib.h>
diff --git a/gcc/testsuite/gcc.target/mips/mips-3d-8.c b/gcc/testsuite/gcc.target/mips/mips-3d-8.c
index 1d199d7..0ad8c48 100644
--- a/gcc/testsuite/gcc.target/mips/mips-3d-8.c
+++ b/gcc/testsuite/gcc.target/mips/mips-3d-8.c
@@ -1,5 +1,5 @@
 /* { dg-do run } */
-/* { dg-options "-mips3d" } */
+/* { dg-options "-mips3d forbid_cpu=octeon.*" } */
 
 /* Test MIPS-3D absolute compare and conditional move builtin functions */
 #include <stdlib.h>
diff --git a/gcc/testsuite/gcc.target/mips/mips-3d-9.c b/gcc/testsuite/gcc.target/mips/mips-3d-9.c
index d697efd..0c30252 100644
--- a/gcc/testsuite/gcc.target/mips/mips-3d-9.c
+++ b/gcc/testsuite/gcc.target/mips/mips-3d-9.c
@@ -1,5 +1,5 @@
 /* { dg-do run } */
-/* { dg-options "-mips3d" } */
+/* { dg-options "-mips3d forbid_cpu=octeon.*" } */
 
 /* Matrix Multiplications */
 #include <stdlib.h>
diff --git a/gcc/testsuite/gcc.target/mips/mips-ps-1.c b/gcc/testsuite/gcc.target/mips/mips-ps-1.c
index 73598a8..980dd05 100644
--- a/gcc/testsuite/gcc.target/mips/mips-ps-1.c
+++ b/gcc/testsuite/gcc.target/mips/mips-ps-1.c
@@ -1,5 +1,5 @@
 /* { dg-do run } */
-/* { dg-options "-mpaired-single" } */
+/* { dg-options "-mpaired-single forbid_cpu=octeon.*" } */
 
 /* Test v2sf calculations */
 #include <stdlib.h>
diff --git a/gcc/testsuite/gcc.target/mips/mips-ps-2.c b/gcc/testsuite/gcc.target/mips/mips-ps-2.c
index 5264255..654aa06 100644
--- a/gcc/testsuite/gcc.target/mips/mips-ps-2.c
+++ b/gcc/testsuite/gcc.target/mips/mips-ps-2.c
@@ -1,5 +1,5 @@
 /* { dg-do run } */
-/* { dg-options "-mpaired-single" } */
+/* { dg-options "-mpaired-single forbid_cpu=octeon.*" } */
 
 /* Test MIPS paired-single builtin functions */
 #include <stdlib.h>
diff --git a/gcc/testsuite/gcc.target/mips/mips-ps-3.c b/gcc/testsuite/gcc.target/mips/mips-ps-3.c
index 7e6ffd0..fc892a8 100644
--- a/gcc/testsuite/gcc.target/mips/mips-ps-3.c
+++ b/gcc/testsuite/gcc.target/mips/mips-ps-3.c
@@ -1,5 +1,5 @@
 /* { dg-do run } */
-/* { dg-options "-mpaired-single" } */
+/* { dg-options "-mpaired-single forbid_cpu=octeon.*" } */
 
 /* Test MIPS paired-single conditional move */
 #include <stdlib.h>
diff --git a/gcc/testsuite/gcc.target/mips/mips-ps-4.c b/gcc/testsuite/gcc.target/mips/mips-ps-4.c
index 06850ad..7871e56 100644
--- a/gcc/testsuite/gcc.target/mips/mips-ps-4.c
+++ b/gcc/testsuite/gcc.target/mips/mips-ps-4.c
@@ -1,5 +1,5 @@
 /* { dg-do run } */
-/* { dg-options "-mpaired-single" } */
+/* { dg-options "-mpaired-single forbid_cpu=octeon.*" } */
 
 /* Test MIPS paired-single comparisons */
 #include <stdlib.h>
diff --git a/gcc/testsuite/gcc.target/mips/mips-ps-5.c b/gcc/testsuite/gcc.target/mips/mips-ps-5.c
index 077076f..4499e54 100644
--- a/gcc/testsuite/gcc.target/mips/mips-ps-5.c
+++ b/gcc/testsuite/gcc.target/mips/mips-ps-5.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-mpaired-single -mgp64 -ftree-vectorize" } */
+/* { dg-options "-mpaired-single -mgp64 -ftree-vectorize forbid_cpu=octeon.*" } */
 /* { dg-skip-if "requires vectorization" { *-*-* } { "-O0" "-Os" } { "" } } */
 
 extern float a[] __attribute__ ((aligned (8)));
diff --git a/gcc/testsuite/gcc.target/mips/mips-ps-6.c b/gcc/testsuite/gcc.target/mips/mips-ps-6.c
index 5bdfe43..42c1756 100644
--- a/gcc/testsuite/gcc.target/mips/mips-ps-6.c
+++ b/gcc/testsuite/gcc.target/mips/mips-ps-6.c
@@ -1,7 +1,7 @@
 /* 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" } */
+/* { dg-options "-mpaired-single -ffinite-math-only forbid_cpu=octeon.*" } */
 
 /* Test MIPS paired-single builtin functions */
 #include <stdlib.h>
diff --git a/gcc/testsuite/gcc.target/mips/mips-ps-7.c b/gcc/testsuite/gcc.target/mips/mips-ps-7.c
index 3b4e530..29e29aa 100644
--- a/gcc/testsuite/gcc.target/mips/mips-ps-7.c
+++ b/gcc/testsuite/gcc.target/mips/mips-ps-7.c
@@ -1,6 +1,6 @@
 /* mips-ps-5.c with -mgp32 instead of -mgp64.  */
 /* { dg-do compile } */
-/* { dg-options "-mgp32 -mpaired-single -ftree-vectorize" } */
+/* { dg-options "-mgp32 -mpaired-single -ftree-vectorize forbid_cpu=octeon.*" } */
 /* { dg-skip-if "requires vectorization" { *-*-* } { "-O0" "-Os" } { "" } } */
 
 extern float a[] __attribute__ ((aligned (8)));
diff --git a/gcc/testsuite/gcc.target/mips/mips-ps-type-2.c b/gcc/testsuite/gcc.target/mips/mips-ps-type-2.c
index a4dfbae..6aba815 100644
--- a/gcc/testsuite/gcc.target/mips/mips-ps-type-2.c
+++ b/gcc/testsuite/gcc.target/mips/mips-ps-type-2.c
@@ -1,7 +1,7 @@
 /* Test v2sf calculations.  The nmadd and nmsub patterns need
    -ffinite-math-only.  */
 /* { dg-do compile } */
-/* { dg-options "(HAS_MADDPS) -mgp32 -mpaired-single -ffinite-math-only" } */
+/* { dg-options "(HAS_MADDPS) -mgp32 -mpaired-single -ffinite-math-only forbid_cpu=octeon.*" } */
 /* { dg-skip-if "nmadd and nmsub need combine" { *-*-* } { "-O0" } { "" } } */
 /* { dg-final { scan-assembler "\tcvt.ps.s\t" } } */
 /* { dg-final { scan-assembler "\tmov.ps\t" } } */
diff --git a/gcc/testsuite/gcc.target/mips/mips-ps-type.c b/gcc/testsuite/gcc.target/mips/mips-ps-type.c
index c36dc25..454ffc3 100644
--- a/gcc/testsuite/gcc.target/mips/mips-ps-type.c
+++ b/gcc/testsuite/gcc.target/mips/mips-ps-type.c
@@ -1,7 +1,7 @@
 /* Test v2sf calculations.  The nmadd and nmsub patterns need
    -ffinite-math-only.  */
 /* { dg-do compile } */ 
-/* { dg-options "-mpaired-single -mgp64 -ffinite-math-only" } */
+/* { dg-options "-mpaired-single -mgp64 -ffinite-math-only forbid_cpu=octeon.*" } */
 /* { dg-skip-if "nmadd and nmsub need combine" { *-*-* } { "-O0" } { "" } } */
 /* { dg-final { scan-assembler "\tcvt.ps.s\t" } } */
 /* { dg-final { scan-assembler "\tmov.ps\t" } } */
diff --git a/gcc/testsuite/gcc.target/mips/mips16-attributes-6.c b/gcc/testsuite/gcc.target/mips/mips16-attributes-6.c
index 99bdf8c..12f3ad0 100644
--- a/gcc/testsuite/gcc.target/mips/mips16-attributes-6.c
+++ b/gcc/testsuite/gcc.target/mips/mips16-attributes-6.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-mips16 addressing=absolute -mips3d" } */
+/* { dg-options "-mips16 addressing=absolute -mips3d forbid_cpu=octeon.*" } */
 
 static inline NOMIPS16 float
 i1 (float f)