predicates.md (easy_fp_constant): Return 0 for SFmode and DFmode before reload when...

        * config/rs6000/predicates.md (easy_fp_constant): Return 0 for
        SFmode and DFmode before reload when
        flag_unsafe_math_optimizations not enabled.

From-SVN: r97014

gcc/ChangeLog

+2005-03-24  David Edelsohn  <edelsohn@gnu.org>
+
+	* config/rs6000/predicates.md (easy_fp_constant): Return 0 for
+	SFmode and DFmode before reload when
+	flag_unsafe_math_optimizations not enabled.
+
 2005-03-24  Geoffrey Keating  <geoffk@apple.com>
 
 	* config/i386/darwin.h (TARGET_SUBTARGET_DEFAULT): Add

gcc/config/rs6000/predicates.md

@@ -219,8 +219,15 @@
       long k[2];
       REAL_VALUE_TYPE rv;
 
-      if (TARGET_E500_DOUBLE)
-	return 0;
+      /* Force constants to memory before reload to utilize
+	 compress_float_constant.
+	 Avoid this when flag_unsafe_math_optimizations is enabled
+	 because RDIV division to reciprocal optimization is not able
+	 to regenerate the division.  */
+      if (TARGET_E500_DOUBLE
+          || (!reload_in_progress && !reload_completed
+	      && !flag_unsafe_math_optimizations))
+        return 0;
 
       REAL_VALUE_FROM_CONST_DOUBLE (rv, op);
       REAL_VALUE_TO_TARGET_DOUBLE (rv, k);
@@ -234,6 +241,15 @@
       long l;
       REAL_VALUE_TYPE rv;
 
+      /* Force constants to memory before reload to utilize
+	 compress_float_constant.
+	 Avoid this when flag_unsafe_math_optimizations is enabled
+	 because RDIV division to reciprocal optimization is not able
+	 to regenerate the division.  */
+      if (!reload_in_progress && !reload_completed
+          && !flag_unsafe_math_optimizations)
+	return 0;
+
       REAL_VALUE_FROM_CONST_DOUBLE (rv, op);
       REAL_VALUE_TO_TARGET_SINGLE (rv, l);