ira.c (find_moveable_pseudos): Skip registers whose DF_REG_EQ_USE_COUNT is nonzero.

	* ira.c (find_moveable_pseudos): Skip registers whose
	DF_REG_EQ_USE_COUNT is nonzero.

From-SVN: r187495

gcc/ChangeLog

+2012-05-15  Bernd Schmidt  <bernds@codesourcery.com>
+
+	* ira.c (find_moveable_pseudos): Skip registers whose
+	DF_REG_EQ_USE_COUNT is nonzero.
+
 2012-05-15  Kenneth Zadeck  <zadeck@naturalbridge.com>
 
 	* doc/md.texi (fma): Define to only be applicable for single

gcc/ira.c

@@ -3770,6 +3770,7 @@ find_moveable_pseudos (void)
 	    if (DF_REG_DEF_COUNT (regno) != 1
 		|| !DF_REF_INSN_INFO (def)
 		|| HARD_REGISTER_NUM_P (regno)
+		|| DF_REG_EQ_USE_COUNT (regno) > 0
 		|| (!INTEGRAL_MODE_P (mode) && !FLOAT_MODE_P (mode)))
 	      continue;
 	    def_insn = DF_REF_INSN (def);