combine.c (combine_simplify_rtx): Remove TRULY_NOOP_TRUNCATION check when…

combine.c (combine_simplify_rtx): Remove TRULY_NOOP_TRUNCATION check when calling force_to_mode on TRUNCATE's operand.

	* combine.c (combine_simplify_rtx): Remove TRULY_NOOP_TRUNCATION
	check when calling force_to_mode on TRUNCATE's operand.

testsuite/
	* gcc.target/mips/truncate-3.c: New test.

From-SVN: r148827

gcc/ChangeLog

+2009-06-22  Adam Nemet  <anemet@caviumnetworks.com>
+
+	* combine.c (combine_simplify_rtx): Remove TRULY_NOOP_TRUNCATION
+	check when calling force_to_mode on TRUNCATE's operand.
+
 2009-06-22  Ian Lance Taylor  <iant@google.com>
 
 	* config/rs6000/rs6000.opt: Move msched-epilog before

gcc/combine.c

@@ -4889,9 +4889,7 @@ combine_simplify_rtx (rtx x, enum machine_mode op0_mode, int in_dest)
       if (GET_MODE_CLASS (mode) == MODE_PARTIAL_INT)
 	break;
 
-      if (GET_MODE_BITSIZE (mode) <= HOST_BITS_PER_WIDE_INT
-	  && TRULY_NOOP_TRUNCATION (GET_MODE_BITSIZE (mode),
-				    GET_MODE_BITSIZE (GET_MODE (XEXP (x, 0)))))
+      if (GET_MODE_BITSIZE (mode) <= HOST_BITS_PER_WIDE_INT)
 	SUBST (XEXP (x, 0),
 	       force_to_mode (XEXP (x, 0), GET_MODE (XEXP (x, 0)),
 			      GET_MODE_MASK (mode), 0));

gcc/testsuite/ChangeLog

+2009-06-22  Adam Nemet  <anemet@caviumnetworks.com>
+
+	* gcc.target/mips/truncate-3.c: New test.
+
 2009-06-22  Janus Weil  <janus@gcc.gnu.org>
 
 	PR fortran/37254

gcc/testsuite/gcc.target/mips/truncate-3.c

+/* Remove redundant operations in truncate's operand.  */
+/* { dg-options "-O -mgp64" } */
+/* { dg-final { scan-assembler-not "\tandi?\t" } } */
+
+f (long long d)
+{
+  long long c = d & 0xffffffffff;
+  int i = (int) c;
+  g (i);
+}
+