re PR inline-asm/33600 (Breakage caused by the fix to PR33552)

gcc/
 PR inline-asm/33600
 * function.c (match_asm_constraints_1): Check for input
 being used in the outputs.

testsuite/
 * gcc.target/i386/pr33600.c: New testcase.

From-SVN: r129035

gcc/ChangeLog

+2007-10-05  Michael Matz  <matz@suse.de>
+
+	PR inline-asm/33600
+	* function.c (match_asm_constraints_1): Check for input
+	being used in the outputs.
+
 2007-10-05  Richard Guenther  <rguenther@suse.de>
 
 	* tree-cfg.c (verify_gimple_expr): Accept OBJ_TYPE_REF.

gcc/function.c

@@ -5716,7 +5716,7 @@ match_asm_constraints_1 (rtx insn, rtx *p_sets, int noutputs)
 	 which wouldn't have happen without this pass.  So, iterate over
 	 all operands and replace all occurences of the register used.  */
       for (j = 0; j < noutputs; j++)
-	if (!rtx_equal_p (SET_DEST (p_sets[j]), output)
+	if (!rtx_equal_p (SET_DEST (p_sets[j]), input)
 	    && reg_overlap_mentioned_p (input, SET_DEST (p_sets[j])))
 	  SET_DEST (p_sets[j]) = replace_rtx (SET_DEST (p_sets[j]),
 					      input, output);

gcc/testsuite/ChangeLog

+2007-10-05  Michael Matz  <matz@suse.de>
+
+	PR inline-asm/33600
+	* gcc.target/i386/pr33600.c: New testcase.
+
 2007-10-05  Richard Guenther  <rguenther@suse.de>
 
 	* g++.dg/tree-ssa/obj-type-ref.C: New testcase.

gcc/testsuite/gcc.target/i386/pr33600.c

+/* { dg-do compile } */
+/* { dg-options "-O2" } */
+int f(int n)
+{
+        int x;
+
+        asm("" : "=&c"(n), "=r"(x) : "1"(n), "0"(n));
+
+        return n;
+}