Fix for SH gcc.c-torture/compile/991229-3.c failure:

* loop.c (reg_in_basic_block_p): Don't abort when falling through
	to the end of the function.

From-SVN: r32229

gcc/ChangeLog

@@ -1,3 +1,8 @@
+Mon Feb 28 11:34:43 2000  J"orn Rennecke <amylaar@cygnus.co.uk>
+
+	* loop.c (reg_in_basic_block_p): Don't abort when falling through
+	to the end of the function.
+
 2000-02-27  Mark Mitchell  <mark@codesourcery.com>
 
 	* emit-rtl.c (remove_unncessary_notes): Remove notes for empty

gcc/loop.c

@@ -1284,8 +1284,12 @@ reg_in_basic_block_p (insn, reg)
 	}
     }
 
-  /* The "last use" doesn't follow the "first use"??  */
-  abort ();
+  /* The "last use" that was recorded can't be found after the first
+     use.  This can happen when the last use was deleted while
+     processing an inner loop, this inner loop was then completely
+     unrolled, and the outer loop is always exited after the inner loop,
+     so that everything after the first use becomes a single basic block.  */
+  return 1;
 }
 
 /* Compute the benefit of eliminating the insns in the block whose