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re PR tree-optimization/23584 (ipa-pure-const pass ignores dereferencing a volatile pointer type) 

PR middle-end/23584
        * ipa-pure-const.c (check_tree): Check for volatile-ness
        when considering a dereference.

From-SVN: r103546
This commit is contained in:
Josh Conner 2005-08-26 22:42:44 +00:00 committed by Josh Conner
parent 24b7d7c318
commit 1b0d2d1789
2 changed files with 13 additions and 6 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2005-08-26 Josh Conner <jconner@apple.com>
PR middle-end/23584
* ipa-pure-const.c (check_tree): Check for volatile-ness
when considering a dereference.
2005-08-27 Jakub Jelinek <jakub@redhat.com>
* rtl.h (MEM_IN_STRUCT_P): Fix comment typo.

13
gcc/ipa-pure-const.c
View File

@ -182,13 +182,14 @@ check_tree (funct_state local, tree t, bool checking_write)
/* Any indirect reference that occurs on the lhs
disqualifies the function from being pure or const. Any
indirect reference that occurs on the rhs disqualifies
the function from being const. */
if (checking_write)
indirect reference to a volatile disqualifies the
function from being pure or const. Any indirect
reference that occurs on the rhs disqualifies the
function from being const. */
if (checking_write || TREE_THIS_VOLATILE (t))
local->pure_const_state = IPA_NEITHER;
else
if (local->pure_const_state == IPA_CONST)
local->pure_const_state = IPA_PURE;
else if (local->pure_const_state == IPA_CONST)
local->pure_const_state = IPA_PURE;
}
if (SSA_VAR_P (t))