re PR rtl-optimization/13985 (ICE in gcc.c-torture/compile/930621-1.c)

	PR optimization/13985
	* cfgloopmanip.c (fix_loop_placements): New prototype.
	Call fix_bb_placements on the preheader of loops that have
	been reparented.
	(remove_path): Adjust call to fix_loop_placements.

From-SVN: r81112

1 files changed, 45 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/loop-3.c b/gcc/testsuite/gcc.dg/loop-3.c
new file mode 100644
index 0000000..ba6fe55
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/loop-3.c
@@ -0,0 +1,45 @@
+/* PR optimization/13985 */
+/* Copied from gcc.c-torture/compile/930621-1.c */
+
+/* { dg-do compile } */
+/* { dg-options "-O3" } */
+/* { dg-options "-O3 -mtune=i386" { target i?86-*-* x86_64-*-* } } */
+
+#if defined(STACK_SIZE) && (STACK_SIZE < 65536)
+# define BYTEMEM_SIZE 10000L
+#endif
+
+#ifndef BYTEMEM_SIZE
+# define BYTEMEM_SIZE 45000L
+#endif
+
+int bytestart[5000 + 1];
+unsigned char modtext[400 + 1];
+unsigned char bytemem[2][BYTEMEM_SIZE + 1];
+
+long
+modlookup (int l)
+{
+  signed char c;
+  long j;
+  long k;
+  signed char w;
+  long p;
+  while (p != 0)
+    {
+      while ((k < bytestart[p + 2]) && (j <= l) && (modtext[j] == bytemem[w][k]))
+	{
+	  k = k + 1;
+	  j = j + 1;
+	}
+      if (k == bytestart[p + 2])
+	if (j > l)
+	  c = 1;
+	else c = 4;
+      else if (j > l)
+	c = 3;
+      else if (modtext[j] < bytemem[w][k])
+	c = 0;
+      else c = 2;
+    }
+}