From 07309d58d08122d67d722bc297eb371d9788488c Mon Sep 17 00:00:00 2001
From: Uros Bizjak <ubizjak@gmail.com>
Date: Tue, 22 Jun 2010 16:44:24 +0200
Subject: [PATCH] * bitmap.c (bitmap_clear_bit): Micro optimize.
From-SVN: r161189
---
gcc/ChangeLog | 4 ++++
gcc/bitmap.c | 12 +++++++-----
2 files changed, 11 insertions(+), 5 deletions(-)
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index ca0ebf53abf2..b3aae11cf09b 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2010-06-22 Uros Bizjak <ubizjak@gmail.com>
+
+ * bitmap.c (bitmap_clear_bit): Micro optimize.
+
2010-06-22 Uros Bizjak <ubizjak@gmail.com>
* config/i386/i386.md (SWI1248x): New mode iterator.
diff --git a/gcc/bitmap.c b/gcc/bitmap.c
index aeaf2ea00e1c..f2fd2bdb510a 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;
}
--
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