From: Richard Sandiford <rsandifo@linux.vnet.ibm.com>
Date: Fri, 2 May 2014 15:35:33 +0000 (+0000)
Subject: hwint.h (zext_hwi): Fix signed overflow for prec == 63.
X-Git-Tag: releases/gcc-5.1.0~7809
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=e13b3dfdeea77ac62a65c4afc710190ef413c9f8;p=thirdparty%2Fgcc.git

hwint.h (zext_hwi): Fix signed overflow for prec == 63.

gcc/
	* hwint.h (zext_hwi): Fix signed overflow for prec == 63.

From-SVN: r210006
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 69342ebbb91d..738dee31511d 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2014-05-02  Richard Sandiford  <rsandifo@linux.vnet.ibm.com>
+
+	* hwint.h (zext_hwi): Fix signed overflow for prec == 63.
+
 2014-05-02  Alan Lawrence  <alan.lawrence@arm.com>
 
 	* config/aarch64/aarch64.c (aarch64_expand_vec_perm_1): Tidy bit-flip
diff --git a/gcc/hwint.h b/gcc/hwint.h
index 229fb94b5655..ac9c9a295b43 100644
--- a/gcc/hwint.h
+++ b/gcc/hwint.h
@@ -344,7 +344,7 @@ zext_hwi (unsigned HOST_WIDE_INT src, unsigned int prec)
   else
     {
       gcc_checking_assert (prec < HOST_BITS_PER_WIDE_INT);
-      return src & (((HOST_WIDE_INT) 1 << prec) - 1);
+      return src & (((unsigned HOST_WIDE_INT) 1 << prec) - 1);
     }
 }