* bitmap.c (bitmap_clear_bit): Micro optimize.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@161189 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 7 insertions, 5 deletions

diff --git a/gcc/bitmap.c b/gcc/bitmap.c
index aeaf2ea00e1..f2fd2bdb510 100644
--- a/gcc/bitmap.c
+++ b/gcc/bitmap.c
@@ -624,11 +624,13 @@ bitmap_clear_bit (bitmap head, int bit)
       BITMAP_WORD bit_val = ((BITMAP_WORD) 1) << bit_num;
       bool res = (ptr->bits[word_num] & bit_val) != 0;
       if (res)
-	ptr->bits[word_num] &= ~bit_val;
-
-      /* If we cleared the entire word, free up the element.  */
-      if (bitmap_element_zerop (ptr))
-	bitmap_element_free (head, ptr);
+	{
+	  ptr->bits[word_num] &= ~bit_val;
+	  /* If we cleared the entire word, free up the element.  */
+	  if (!ptr->bits[word_num]
+	      && bitmap_element_zerop (ptr))
+	    bitmap_element_free (head, ptr);
+	}
 
       return res;
     }