Fix 42747, make -mvsx enable sqrt

From-SVN: r155923

gcc/ChangeLog

+2010-01-14  Michael Meissner  <meissner@linux.vnet.ibm.com>
+
+	PR target/42747
+	* config/rs6000/rs6000.md (sqrtdf2): Split into expander and insn
+	to allow generation of the xssqrtdp instruction on power7.
+	(sqrtdf2_fpr): Ditto.
+
 2010-01-14  Jakub Jelinek  <jakub@redhat.com>
 
 	PR middle-end/42674

gcc/config/rs6000/rs6000.md

 ;; Machine description for IBM RISC System 6000 (POWER) for GNU C compiler
 ;; Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
-;; 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
+;; 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
 ;; Free Software Foundation, Inc.
 ;; Contributed by Richard Kenner (kenner@vlsi1.ultra.nyu.edu)
 
@@ -6310,7 +6310,14 @@
   [(set_attr "type" "dmul")
    (set_attr "fp_type" "fp_maddsub_d")])
 
-(define_insn "sqrtdf2"
+(define_expand "sqrtdf2"
+  [(set (match_operand:DF 0 "gpc_reg_operand" "")
+	(sqrt:DF (match_operand:DF 1 "gpc_reg_operand" "")))]
+  "(TARGET_PPC_GPOPT || TARGET_POWER2) && TARGET_HARD_FLOAT && TARGET_FPRS 
+   && TARGET_DOUBLE_FLOAT"
+  "")
+
+(define_insn "*sqrtdf2_fpr"
   [(set (match_operand:DF 0 "gpc_reg_operand" "=d")
 	(sqrt:DF (match_operand:DF 1 "gpc_reg_operand" "d")))]
   "(TARGET_PPC_GPOPT || TARGET_POWER2) && TARGET_HARD_FLOAT && TARGET_FPRS 

gcc/testsuite/ChangeLog

+2010-01-14  Michael Meissner  <meissner@linux.vnet.ibm.com>
+
+	* gcc.target/powerpc/pr42747.c: New file.
+
 2010-01-14  Jakub Jelinek  <jakub@redhat.com>
 
 	PR middle-end/42674

gcc/testsuite/gcc.target/powerpc/pr42747.c

+/* { dg-do compile { target { powerpc*-*-* } } } */
+/* { dg-skip-if "" { powerpc*-*-darwin* } { "*" } { "" } } */
+/* { dg-require-effective-target powerpc_vsx_ok } */
+/* { dg-options "-O2 -mcpu=power7 -ffast-math" } */
+
+double foo (double x) { return __builtin_sqrt (x); }
+
+/* { dg-final { scan-assembler "xssqrtdp" } } */