From: Richard Biener <rguenther@suse.de>
Date: Wed, 25 Sep 2024 11:37:59 +0000 (+0200)
Subject: Speed up get_bitmask_from_range
X-Git-Tag: basepoints/gcc-16~5688
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0e095df4b4c61bc57413cf3cbca56ff1a038de40;p=thirdparty%2Fgcc.git

Speed up get_bitmask_from_range

When min != max we know min ^ max != 0.

	* value-range.cc (get_bitmask_from_range): Remove redundant
	compare of xorv with zero.
---

diff --git a/gcc/value-range.cc b/gcc/value-range.cc
index 9c3eb78459d..3046232bbca 100644
--- a/gcc/value-range.cc
+++ b/gcc/value-range.cc
@@ -48,10 +48,7 @@ get_bitmask_from_range (tree type,
     }
 
   wide_int xorv = min ^ max;
-
-  if (xorv != 0)
-    xorv = wi::mask (prec - wi::clz (xorv), false, prec);
-
+  xorv = wi::mask (prec - wi::clz (xorv), false, prec);
   return irange_bitmask (wi::zero (prec), min | xorv);
 }