2010-12-09 Steven G. Kargl <kargl@gcc.gnu.org>

[pf3gnuchains/gcc-fork.git] / gcc / builtins.c

diff --git a/gcc/builtins.c b/gcc/builtins.c
index 2816a7e..eb2aa3e 100644 (file)
--- a/gcc/builtins.c
+++ b/gcc/builtins.c
@@ -3068,7 +3068,8 @@ expand_builtin_pow_root (location_t loc, tree arg0, tree arg1, tree type,
          if (REAL_VALUES_EQUAL (c, dconsthalf))
            op = build_call_nofold_loc (loc, sqrtfn, 1, arg0);
 
-         else
+         /* Don't do this optimization if we don't have a sqrt insn.  */
+         else if (optab_handler (sqrt_optab, mode) != CODE_FOR_nothing)
            {
              REAL_VALUE_TYPE dconst1_4 = dconst1;
              REAL_VALUE_TYPE dconst3_4;
@@ -3114,7 +3115,8 @@ expand_builtin_pow_root (location_t loc, tree arg0, tree arg1, tree type,
            op = build_call_nofold_loc (loc, cbrtfn, 1, arg0);
 
              /* Now try 1/6.  */
-         else if (optimize_insn_for_speed_p ())
+         else if (optimize_insn_for_speed_p ()
+                  && optab_handler (sqrt_optab, mode) != CODE_FOR_nothing)
            {
              REAL_VALUE_TYPE dconst1_6 = dconst1_3;
              SET_REAL_EXP (&dconst1_6, REAL_EXP (&dconst1_6) - 1);