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re PR middle-end/23463 (va-arg-22.c execution fails)

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2005-08-27  Andrew Pinski  <pinskia@physics.uc.edu>

        PR middle-end/23463
        * gimplify.c (gimplify_modify_expr_rhs): Remove check for zero sized
        types.
        (gimplify_modify_expr): Check for zero sized types and gimplify the
        rhs and lhs as statements.

2005-08-27  Andrew Pinski  <pinskia@physics.uc.edu>

        PR middle-end/23463
        * gcc.c-torture/execute/zero-struct-1.c: New test.

From-SVN: r103571
This commit is contained in:
Andrew Pinski 2005-08-27 21:37:53 +00:00 committed by Andrew Pinski
parent 147a8fb1ca
commit 412f898605
4 changed files with 48 additions and 6 deletions
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8
gcc/ChangeLog
View File

@ -1,3 +1,11 @@
2005-08-27 Andrew Pinski <pinskia@physics.uc.edu>
PR middle-end/23463
* gimplify.c (gimplify_modify_expr_rhs): Remove check for zero sized
types.
(gimplify_modify_expr): Check for zero sized types and gimplify the
rhs and lhs as statements.
2005-08-27 John David Anglin <dave.anflin@nrc-cnrc.gc.ca>
PR libgcj/23508

18
gcc/gimplify.c
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@ -2965,12 +2965,6 @@ gimplify_modify_expr_rhs (tree *expr_p, tree *from_p, tree *to_p, tree *pre_p,
tree *post_p, bool want_value)
{
enum gimplify_status ret = GS_OK;
tree type = TREE_TYPE (*from_p);
if (zero_sized_type (type))
{
*expr_p = NULL_TREE;
return GS_ALL_DONE;
}
while (ret != GS_UNHANDLED)
switch (TREE_CODE (*from_p))
@ -3164,6 +3158,18 @@ gimplify_modify_expr (tree *expr_p, tree *pre_p, tree *post_p, bool want_value)
/* The distinction between MODIFY_EXPR and INIT_EXPR is no longer useful. */
if (TREE_CODE (*expr_p) == INIT_EXPR)
TREE_SET_CODE (*expr_p, MODIFY_EXPR);
/* For zero sized types only gimplify the left hand side and right hand side
as statements and throw away the assignment. */
if (zero_sized_type (TREE_TYPE (*from_p)))
{
gimplify_stmt (from_p);
gimplify_stmt (to_p);
append_to_statement_list (*from_p, pre_p);
append_to_statement_list (*to_p, pre_p);
*expr_p = NULL_TREE;
return GS_ALL_DONE;
}
/* See if any simplifications can be done based on what the RHS is. */
ret = gimplify_modify_expr_rhs (expr_p, from_p, to_p, pre_p, post_p,

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2005-08-27 Andrew Pinski <pinskia@physics.uc.edu>
PR middle-end/23463
* gcc.c-torture/execute/zero-struct-1.c: New test.
2005-08-27 Richard Guenther <rguenther@suse.de>
PR target/23575

23
gcc/testsuite/gcc.c-torture/execute/zero-struct-1.c Normal file
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@ -0,0 +1,23 @@
struct g{};
char y[3];
char *f = &y[0];
char *ff = &y[0];
void h(void)
{
struct g t;
*((struct g*)(f++)) = *((struct g*)(ff++));
*((struct g*)(f++)) = (struct g){};
t = *((struct g*)(ff++));
}
void abort (void);
int main(void)
{
h();
if (f != &y[2])
abort();
if (ff != &y[2])
abort();
return 0;
}