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alias.c (find_base_value): Add cases for HIGH...

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2002-01-10  David Edelsohn  <edelsohn@gnu.org>

        * alias.c (find_base_value): Add cases for HIGH, PRE_INC, PRE_DEC,
        POST_INC, POST_DEC, PRE_MODIFY, and POST_MODIFY.
        (find_base_term): Add cases for TRUNCATE, PRE_MODIFY, and POST_MODIFY.
        Recurse for any operand of AND as long as constant is non-zero.

From-SVN: r48741
This commit is contained in:
David Edelsohn 2002-01-10 18:20:03 +00:00 committed by David Edelsohn
parent ac2ee9b7e7
commit d288e53d0c
2 changed files with 21 additions and 2 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2002-01-10 David Edelsohn <edelsohn@gnu.org>
* alias.c (find_base_value): Add cases for HIGH, PRE_INC, PRE_DEC,
POST_INC, POST_DEC, PRE_MODIFY, and POST_MODIFY.
(find_base_term): Add cases for TRUNCATE, PRE_MODIFY, and POST_MODIFY.
Recurse for any operand of AND as long as constant is non-zero.
2002-01-10 Kazu Hirata <kazu@hxi.com>
* config/h8300/h8300.md: Remove constraints from expanders.

16
gcc/alias.c
View File

@ -849,6 +849,12 @@ find_base_value (src)
case ZERO_EXTEND:
case SIGN_EXTEND: /* used for NT/Alpha pointers */
case HIGH:
case PRE_INC:
case PRE_DEC:
case POST_INC:
case POST_DEC:
case PRE_MODIFY:
case POST_MODIFY:
return find_base_value (XEXP (src, 0));
default:
@ -1220,6 +1226,10 @@ find_base_term (x)
case REG:
return REG_BASE_VALUE (x);
case TRUNCATE:
if (GET_MODE_SIZE (GET_MODE (x)) < GET_MODE_SIZE (Pmode))
return 0;
/* Fall through. */
case ZERO_EXTEND:
case SIGN_EXTEND: /* Used for Alpha/NT pointers */
case HIGH:
@ -1227,6 +1237,8 @@ find_base_term (x)
case PRE_DEC:
case POST_INC:
case POST_DEC:
case PRE_MODIFY:
case POST_MODIFY:
return find_base_term (XEXP (x, 0));
case VALUE:
@ -1300,8 +1312,8 @@ find_base_term (x)
}
case AND:
if (GET_CODE (XEXP (x, 0)) == REG && GET_CODE (XEXP (x, 1)) == CONST_INT)
return REG_BASE_VALUE (XEXP (x, 0));
if (GET_CODE (XEXP (x, 1)) == CONST_INT && INTVAL (XEXP (x, 1)) != 0)
return find_base_term (XEXP (x, 0));
return 0;
case SYMBOL_REF: