From: Jakub Jelinek <jakub@redhat.com>
Date: Mon, 23 Jun 2008 11:51:34 +0000 (+0200)
Subject: re PR tree-optimization/36508 (ICE in compute_antic)
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=53983ae9f340b1378e9aae93728c6bc2e62d4317;p=gcc.git

re PR tree-optimization/36508 (ICE in compute_antic)

	PR tree-optimization/36508
	* tree-ssa-pre.c (compute_antic): Allow num_iterations up to
	499, don't check it at all in release compilers.

	* gcc.dg/pr36508.c: New test.

From-SVN: r137036
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index b91ebd197bc..409f5040a24 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2008-06-23  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/36508
+	* tree-ssa-pre.c (compute_antic): Allow num_iterations up to
+	499, don't check it at all in release compilers.
+
 2008-06-23  Uros Bizjak  <ubizjak@gmail.com>
 
 	* config/i386/i386.md (*fop_<mode>_1_i387): Use SSE_FLOAT_MODE_P
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 71de4be63ce..1eaff577cc7 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2008-06-23  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/36508
+	* gcc.dg/pr36508.c: New test.
+
 2008-06-20  Joseph Myers  <joseph@codesourcery.com>
 
 	* gcc.dg/inline-31.c: New test.
diff --git a/gcc/testsuite/gcc.dg/pr36508.c b/gcc/testsuite/gcc.dg/pr36508.c
new file mode 100644
index 00000000000..30489923642
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr36508.c
@@ -0,0 +1,29 @@
+/* PR tree-optimization/36508 */
+/* { dg-do compile } */
+/* { dg-options "-O -ftree-pre" } */
+
+void
+foo (short *sp)
+{
+  int k;
+  k = 1;
+#define SP0 *sp++ = 1;
+  while (1)
+    {
+      if (k > 6)
+	break;
+      SP0
+      k++;
+    }
+  k = 1;
+  while (1)
+    {
+      if (k > 6)
+	break;
+      SP0
+      k++;
+    }
+#define SP1 SP0 SP0 SP0 SP0 SP0 SP0 SP0 SP0 SP0 SP0 SP0
+#define SP2 SP1 SP1 SP1 SP1 SP1 SP1 SP1 SP1 SP1 SP1 SP1
+  SP2
+}
diff --git a/gcc/tree-ssa-pre.c b/gcc/tree-ssa-pre.c
index 3f3aae777e1..423afe04785 100644
--- a/gcc/tree-ssa-pre.c
+++ b/gcc/tree-ssa-pre.c
@@ -2094,8 +2094,10 @@ compute_antic (void)
 						      block->index));
 	    }
 	}
+#ifdef ENABLE_CHECKING
       /* Theoretically possible, but *highly* unlikely.  */
-      gcc_assert (num_iterations < 50);
+      gcc_assert (num_iterations < 500);
+#endif
     }
 
   statistics_histogram_event (cfun, "compute_antic iterations",
@@ -2124,8 +2126,10 @@ compute_antic (void)
 							    block->index));
 		}
 	    }
+#ifdef ENABLE_CHECKING
 	  /* Theoretically possible, but *highly* unlikely.  */
-	  gcc_assert (num_iterations < 50);
+	  gcc_assert (num_iterations < 500);
+#endif
 	}
       statistics_histogram_event (cfun, "compute_partial_antic iterations",
 				  num_iterations);