re PR middle-end/33667 (RTL sharing with divmod)

gcc/
 PR middle-end/33667
 * lower-subreg.c (decompose_multiword_subregs): Use
 validate_unshare_change().

testsuite/
 * gcc.dg/pr33667.c: New testcase.

From-SVN: r129038

gcc/ChangeLog

+2007-10-05  Michael Matz  <matz@suse.de>
+
+	PR middle-end/33667
+	* lower-subreg.c (decompose_multiword_subregs): Use
+	validate_unshare_change().
+
 2007-10-05  Peter Bergner  <bergner@vnet.ibm.com>
 
 	* ra-conflict.c: Include "sparseset.h".

gcc/lower-subreg.c

@@ -1339,7 +1339,7 @@ decompose_multiword_subregs (void)
 			  int dup_num = recog_data.dup_num[i];
 			  rtx *px = recog_data.operand_loc[dup_num];
 
-			  validate_change (insn, pl, *px, 1);
+			  validate_unshare_change (insn, pl, *px, 1);
 			}
 
 		      i = apply_change_group ();

gcc/testsuite/ChangeLog

+2007-10-05  Michael Matz  <matz@suse.de>
+
+	PR middle-end/33667
+	* gcc.dg/pr33667.c: New testcase.
+
 2007-10-05  Richard Guenther  <rguenther@suse.de>
 
 	PR middle-end/33666

gcc/testsuite/gcc.dg/pr33667.c

+/* { dg-do compile } */
+/* { dg-options "-O2" } */
+
+typedef unsigned int size_t;
+typedef unsigned char uint8_t;
+typedef unsigned short int uint16_t;
+typedef unsigned long long int uint64_t;
+struct magic {
+  uint8_t mask_op;
+  union {
+   uint64_t _mask;
+  } _u;
+  union VALUETYPE {
+   uint16_t h;
+  } value;
+};
+void cvt_16(union VALUETYPE *p, const struct magic *m)
+{
+  if (m->_u._mask)
+    p->h %= (uint16_t) m->_u._mask;
+}