re PR rtl-optimization/64010 ([msp430-elf] struct function dereference clobbers…

re PR rtl-optimization/64010 ([msp430-elf] struct function dereference clobbers parameter passed to function)

	PR rtl-optimization/64010
	* reload.c (push_reload): Before reusing a register contained
	in an operand as input reload register, ensure that it is not
	used in CALL_INSN_FUNCTION_USAGE.

From-SVN: r218335

gcc/ChangeLog

+2014-12-03  Ulrich Weigand  <Ulrich.Weigand@de.ibm.com>
+
+	PR rtl-optimization/64010
+	* reload.c (push_reload): Before reusing a register contained
+	in an operand as input reload register, ensure that it is not
+	used in CALL_INSN_FUNCTION_USAGE.
+
 2014-12-03  Ulrich Drepper  <drepper@gmail.com>
 
 	* Makefile.in: Use $(LN_S) instead of $(LN) -s and remove file first

gcc/reload.c

@@ -1625,6 +1625,7 @@ push_reload (rtx in, rtx out, rtx *inloc, rtx *outloc,
 					       end_hard_regno (rel_mode,
 							       regno),
 					       PATTERN (this_insn), inloc)
+	    && ! find_reg_fusage (this_insn, USE, XEXP (note, 0))
 	    /* If this is also an output reload, IN cannot be used as
 	       the reload register if it is set in this insn unless IN
 	       is also OUT.  */