KJ16609/gcc
1
0
Fork 0
mirror of https://gcc.gnu.org/git/gcc.git synced 2026-02-22 12:00:03 -05:00
Code Issues Packages Projects Releases Wiki Activity

gcse.c (hash_expr_1): Add in MEM_ALIAS_SET.

Browse Source 
Sat Oct 16 00:07:01 1999  Richard Henderson  <rth@cygnus.com>
        * gcse.c (hash_expr_1): Add in MEM_ALIAS_SET.
        (expr_equiv_p): Reject memories with different alias sets.

From-SVN: r30047
This commit is contained in:
Jeffrey A Law
1999-10-16 21:20:32 +00:00
committed by Jeff Law
parent ae698cc0e5
commit 2aa437e3fb
2 changed files with 15 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
gcc/ChangeLog
View File

@@ -1,3 +1,9 @@
Sat Oct 16 15:20:15 1999 Jeffrey A Law (law@cygnus.com)
Sat Oct 16 00:07:01 1999 Richard Henderson <rth@cygnus.com>
* gcse.c (hash_expr_1): Add in MEM_ALIAS_SET.
(expr_equiv_p): Reject memories with different alias sets.
Wed Oct 13 01:46:14 1999 Jeffrey A Law (law@cygnus.com)
Wed Oct 13 01:44:29 1999 Carol LePage <carolo@hal.com>

9
gcc/gcse.c
View File

@@ -1394,6 +1394,7 @@ hash_expr_1 (x, mode, do_not_record_p)
return 0;
}
hash += (unsigned) MEM;
hash += MEM_ALIAS_SET (x);
x = XEXP (x, 0);
goto repeat;
@@ -1526,6 +1527,14 @@ expr_equiv_p (x, y)
case REG:
return REGNO (x) == REGNO (y);
case MEM:
/* Can't merge two expressions in different alias sets, since we can
decide that the expression is transparent in a block when it isn't,
due to it being set with the different alias set. */
if (MEM_ALIAS_SET (x) != MEM_ALIAS_SET (y))
return 0;
break;
/* For commutative operations, check both orders. */
case PLUS:
case MULT: