re PR target/79951 (ICE in extract_insn, at recog.c:2311 on ppc64le with -mno-cmpb)

	PR target/79951
	* config/rs6000/rs6000.md (copysign<mode>3_fcpsgn): Test
	for VECTOR_UNIT_VSX_P (<MODE>mode) too.
	* gcc.target/powerpc/pr79951.c: New.

From-SVN: r246228

gcc/ChangeLog

+2017-03-17  Pat Haugen  <pthaugen@us.ibm.com>
+
+	PR target/79951
+	* config/rs6000/rs6000.md (copysign<mode>3_fcpsgn): Test
+	for VECTOR_UNIT_VSX_P (<MODE>mode) too.
+
 2017-03-17  Bernd Schmidt  <bschmidt@redhat.com>
 
 	* reload.c (find_reloads): When reloading a nonoffsettable address,

gcc/config/rs6000/rs6000.md

@@ -4831,7 +4831,7 @@
 	(unspec:SFDF [(match_operand:SFDF 1 "gpc_reg_operand" "<Ff>,<Fv>")
 		      (match_operand:SFDF 2 "gpc_reg_operand" "<Ff>,<Fv>")]
 		     UNSPEC_COPYSIGN))]
-  "TARGET_<MODE>_FPR && TARGET_CMPB"
+  "TARGET_<MODE>_FPR && (TARGET_CMPB || VECTOR_UNIT_VSX_P (<MODE>mode))"
   "@
    fcpsgn %0,%2,%1
    xscpsgndp %x0,%x2,%x1"

gcc/testsuite/ChangeLog

+2017-03-17  Pat Haugen  <pthaugen@us.ibm.com>
+
+	PR target/79951
+	* gcc.target/powerpc/pr79951.c: New.
+
 2017-03-17  Bernd Schmidt  <bschmidt@redhat.com>
 
 	PR rtl-optimization/79910

gcc/testsuite/gcc.target/powerpc/pr79951.c

+/* { dg-do compile { target { powerpc*-*-* } } } */
+/* { dg-require-effective-target powerpc_p8vector_ok } */
+/* { dg-skip-if "do not override -mcpu" { powerpc*-*-* } { "-mcpu=*" } { "-mcpu=power8" } } */
+/* { dg-options "-mcpu=power8 -S -mno-cmpb" } */
+
+float testf (float x, float y)
+{
+  return __builtin_copysignf (x, y);
+}
+