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re PR middle-end/17885 (gimplifing of volatile &a->)

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PR middle-end/17885
        * tree.c (recompute_tree_invarant_for_addr_expr): Always poll address
        of INDIRECT_REF.

From-SVN: r89280
This commit is contained in:
Richard Henderson 2004-10-19 10:24:46 -07:00 committed by Richard Henderson
parent e61d7b781e
commit a8afd3ac14
2 changed files with 12 additions and 9 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2004-10-19 Richard Hendeson <rth@redhat.com>
PR middle-end/17885
* tree.c (recompute_tree_invarant_for_addr_expr): Always poll address
of INDIRECT_REF.
2004-10-19 Kazu Hirata <kazu@cs.umass.edu>
* tree-cfg.c (thread_jumps): Use a do-while loop instead of a

15
gcc/tree.c
View File

@ -2311,16 +2311,13 @@ do { tree _node = (NODE); \
}
/* Now see what's inside. If it's an INDIRECT_REF, copy our properties from
it. If it's a decl, it's invariant and constant if the decl is static.
It's also invariant if it's a decl in the current function. (Taking the
address of a volatile variable is not volatile.) If it's a constant,
the address is both invariant and constant. Otherwise it's neither. */
the address, since &(*a)->b is a form of addition. If it's a decl, it's
invariant and constant if the decl is static. It's also invariant if it's
a decl in the current function. Taking the address of a volatile variable
is not volatile. If it's a constant, the address is both invariant and
constant. Otherwise it's neither. */
if (TREE_CODE (node) == INDIRECT_REF)
{
/* If this is &((T*)0)->field, then this is a form of addition. */
if (TREE_CODE (TREE_OPERAND (node, 0)) != INTEGER_CST)
UPDATE_TITCSE (node);
}
UPDATE_TITCSE (TREE_OPERAND (node, 0));
else if (DECL_P (node))
{
if (staticp (node))