From: Jan Hubicka <jh@suse.cz>
Date: Sat, 20 Oct 2012 14:19:12 +0000 (+0200)
Subject: loop-iv.c (iv_number_of_iterations): Record the upper bound only if there are no... 
X-Git-Tag: misc/gccgo-go1_1_2~75
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=bcd8d322db3a07471bd32ceeefbd0c5145a934ca;p=thirdparty%2Fgcc.git

loop-iv.c (iv_number_of_iterations): Record the upper bound only if there are no further conditions on it.


	* loop-iv.c (iv_number_of_iterations): Record the upper bound
	only if there are no further conditions on it.

From-SVN: r192636
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index ecba9c67c68f..47263fd82321 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2012-10-20  Jan Hubicka  <jh@suse.cz>
+
+	* loop-iv.c (iv_number_of_iterations): Record the upper bound
+	only if there are no further conditions on it.
+
 2012-10-20  Manuel López-Ibáñez  <manu@gcc.gnu.org>
 
 	PR c/53063
diff --git a/gcc/loop-iv.c b/gcc/loop-iv.c
index 43d3c4e3ede0..50b75362a972 100644
--- a/gcc/loop-iv.c
+++ b/gcc/loop-iv.c
@@ -2593,8 +2593,10 @@ iv_number_of_iterations (struct loop *loop, rtx insn, rtx condition,
 			 ? iv0.base
 			 : mode_mmin);
 	  max = (up - down) / inc + 1;
-	  record_niter_bound (loop, double_int::from_uhwi (max),
-			      false, true);
+	  if (!desc->infinite
+	      && !desc->assumptions)
+	    record_niter_bound (loop, double_int::from_uhwi (max),
+			        false, true);
 
 	  if (iv0.step == const0_rtx)
 	    {
@@ -2806,15 +2808,19 @@ iv_number_of_iterations (struct loop *loop, rtx insn, rtx condition,
 
       desc->const_iter = true;
       desc->niter = val & GET_MODE_MASK (desc->mode);
-      record_niter_bound (loop, double_int::from_uhwi (desc->niter),
-			  false, true);
+      if (!desc->infinite
+	  && !desc->assumptions)
+        record_niter_bound (loop, double_int::from_uhwi (desc->niter),
+			    false, true);
     }
   else
     {
       max = determine_max_iter (loop, desc, old_niter);
       gcc_assert (max);
-      record_niter_bound (loop, double_int::from_uhwi (max),
-			  false, true);
+      if (!desc->infinite
+	  && !desc->assumptions)
+	record_niter_bound (loop, double_int::from_uhwi (max),
+			    false, true);
 
       /* simplify_using_initial_values does a copy propagation on the registers
 	 in the expression for the number of iterations.  This prolongs life