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tree-ssa-dom.c (propagate_rhs_into_lhs): Don't call update_stmt directly.

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* tree-ssa-dom.c (propagate_rhs_into_lhs): Don't call update_stmt
        directly.  Call mark_new_vars_to_rename slightly earlier.

        * gcc.c-torture/pr26840.c: New test.

From-SVN: r112365
This commit is contained in:
Jeff Law 2006-03-24 16:21:27 -07:00 committed by Jeff Law
parent 58df1c413d
commit 3ae194cd59
4 changed files with 56 additions and 5 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2006-03-24 Jeff Law <law@redhat.com>
* tree-ssa-dom.c (propagate_rhs_into_lhs): Don't call update_stmt
directly. Call mark_new_vars_to_rename slightly earlier.
2006-03-24 Geoffrey Keating <geoffk@apple.com>
PR 26793

4
gcc/testsuite/ChangeLog
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@ -1,3 +1,7 @@
2006-03-24 Jeff Law <law@redhat.com>
* gcc.c-torture/pr26840.c: New test.
2006-03-24 Geoffrey Keating <geoffk@apple.com>
* g++.old-deja/g++.other/init19.C: New.

42
gcc/testsuite/gcc.c-torture/compile/pr26840.c Normal file
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@ -0,0 +1,42 @@
extern int f1 (void **);
extern void f2 (void *);
struct s
{
unsigned char field1;
int field2;
};
static inline struct s *
get_globals (void)
{
struct s * r;
void * rr;
if (f1 (&rr))
return 0;
r = rr;
if (! r)
{
extern struct s t;
r = &t;
}
r->field1 = 1;
return r;
}
void
atexit_common (const void *dso)
{
struct s *g = get_globals ();
if (! g)
return;
if (g->field1)
{
g->field2 = 0;
f2 (g);
}
else
f2 (g);
}

10
gcc/tree-ssa-dom.c
View File

@ -2160,7 +2160,11 @@ propagate_rhs_into_lhs (tree stmt, tree lhs, tree rhs, bitmap interesting_names)
collapse control statements. */
propagate_value (use_p, rhs);
fold_stmt_inplace (use_stmt);
update_stmt (use_stmt);
/* Sometimes propagation can expose new operands to the
renamer. Note this will call update_stmt at the
appropriate time. */
mark_new_vars_to_rename (use_stmt);
/* Dump details. */
if (dump_file && (dump_flags & TDF_DETAILS))
@ -2170,10 +2174,6 @@ propagate_rhs_into_lhs (tree stmt, tree lhs, tree rhs, bitmap interesting_names)
fprintf (dump_file, "\n");
}
/* Sometimes propagation can expose new operands to the
renamer. */
mark_new_vars_to_rename (use_stmt);
/* If we replaced a variable index with a constant, then
we would need to update the invariant flag for ADDR_EXPRs. */
if (TREE_CODE (use_stmt) == MODIFY_EXPR