mirror/gcc
2
0
Fork 0
mirror of git://gcc.gnu.org/git/gcc.git synced 2025-01-12 21:15:10 +08:00
Code Issues Packages Projects Releases Wiki Activity

Use unsigned shift instead of signed shift.

Browse Source 
From-SVN: r29621
This commit is contained in:
Nick Clifton 1999-09-23 14:58:54 +00:00 committed by Nick Clifton
parent f8540d767f
commit 7ce787fe03
2 changed files with 11 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
gcc/ChangeLog
View File

@ -1,3 +1,8 @@
Thu Sep 23 15:54:12 1999 Nick Clifton <nickc@cygnus.com>
* combine.c (simplify_comparison): Use an unsigned shift to adjust
the constant.
Thu Sep 23 08:46:21 1999 Guy Harris <guy@netapp.com>
* gcc.1: Fix a formatting error.

8
gcc/combine.c
View File

@ -10362,8 +10362,12 @@ simplify_comparison (code, pop0, pop1)
& ~ (mask >> (INTVAL (XEXP (op0, 1))
+ ! equality_comparison_p))) == 0)
{
const_op >>= INTVAL (XEXP (op0, 1));
op1 = GEN_INT (const_op);
/* We must perform a logical shift, not an arithmetic one,
as we want the top N bits of C to be zero. */
unsigned HOST_WIDE_INT temp = const_op;
temp >>= INTVAL (XEXP (op0, 1));
op1 = GEN_INT (temp);
op0 = XEXP (op0, 0);
continue;
}