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

1 files changed, 6 insertions, 2 deletions

diff --git a/gcc/loop.c b/gcc/loop.c
index dbec617..9b1584c 100644
--- a/gcc/loop.c
+++ b/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