re PR target/53859 (ICE when calculate insn latency for armv7e-m arch in O2 level)

2012-07-10  Greta Yorsh  <Greta.Yorsh@arm.com>

gcc/
	PR target/53859
	* config/arm/arm.c (arm_early_load_addr_dep): Handle new
	epilogue patterns.

gcc/testsuite

	PR target/53859
	* gcc.target/arm/pr53859.c: New test.

From-SVN: r189423

gcc/ChangeLog

+2012-07-11  Greta Yorsh  <Greta.Yorsh@arm.com>
+
+	PR target/53859
+	* config/arm/arm.c (arm_early_load_addr_dep): Handle new
+	epilogue patterns.
+
 2012-07-11  Jonathan Wakely  <jwakely.gcc@gmail.com>
 
 	* doc/extend.texi (Namespace Association): Alter cautionary text.

gcc/config/arm/arm.c

@@ -23659,7 +23659,12 @@ arm_early_load_addr_dep (rtx producer, rtx consumer)
   if (GET_CODE (addr) == COND_EXEC)
     addr = COND_EXEC_CODE (addr);
   if (GET_CODE (addr) == PARALLEL)
-    addr = XVECEXP (addr, 0, 0);
+    {
+      if (GET_CODE (XVECEXP (addr, 0, 0)) == RETURN)
+        addr = XVECEXP (addr, 0, 1);
+      else
+        addr = XVECEXP (addr, 0, 0);
+    }
   addr = XEXP (addr, 1);
 
   return reg_overlap_mentioned_p (value, addr);

gcc/testsuite/ChangeLog

+2012-07-11  Greta Yorsh  <Greta.Yorsh@arm.com>
+
+	PR target/53859
+	* gcc.target/arm/pr53859.c: New test.
+
 2012-07-10  Oleg Endo  <olegendo@gcc.gnu.org>
 
 	PR target/53886

gcc/testsuite/gcc.target/arm/pr53859.c

+/* PR target/53859 */
+/* { dg-do compile } */
+/* { dg-require-effective-target arm_thumb2_ok } */
+/* { dg-options "-mcpu=cortex-m4 -mthumb -O2" } */
+
+void bar (int,int,char* ,int);
+
+void foo (char c)
+{
+    bar (1,2,&c,3);
+}