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re PR middle-end/46388 (ICE in int_mode_for_mode, at stor-layout.c:493)

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PR middle-end/46388
	* expr.c (expand_assignment): If to_rtx is a VOIDmode MEM, use
	BLKmode mode for it.
	(expand_expr_real_1): Similarly for op0.

	* gcc.c-torture/compile/pr46388.c: New test.

From-SVN: r166603
This commit is contained in:
Jakub Jelinek 2010-11-11 16:48:39 +01:00 • committed by Jakub Jelinek
parent 86de8875db
commit 1004f0c5c8
4 changed files with 46 additions and 10 deletions
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7
gcc/ChangeLog
View file

@ -1,3 +1,10 @@
2010-11-11 Jakub Jelinek <jakub@redhat.com>
PR middle-end/46388
* expr.c (expand_assignment): If to_rtx is a VOIDmode MEM, use
BLKmode mode for it.
(expand_expr_real_1): Similarly for op0.
2010-11-11 Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE>
* doc/sourcebuild.texi (LTO Testing, dg-suppress-ld-options):

30
gcc/expr.c
View file

@ -4260,11 +4260,16 @@ expand_assignment (tree to, tree from, bool nontemporal)
to_rtx = expand_normal (tem);
/* If the bitfield is volatile, we want to access it in the
field's mode, not the computed mode. */
if (volatilep
&& GET_CODE (to_rtx) == MEM
&& flag_strict_volatile_bitfields > 0)
to_rtx = adjust_address (to_rtx, mode1, 0);
field's mode, not the computed mode.
If a MEM has VOIDmode (external with incomplete type),
use BLKmode for it instead. */
if (MEM_P (to_rtx))
{
if (volatilep && flag_strict_volatile_bitfields > 0)
to_rtx = adjust_address (to_rtx, mode1, 0);
else if (GET_MODE (to_rtx) == VOIDmode)
to_rtx = adjust_address (to_rtx, BLKmode, 0);
}
if (offset != 0)
{
@ -9013,11 +9018,16 @@ expand_expr_real_1 (tree exp, rtx target, enum machine_mode tmode,
/* If the bitfield is volatile, we want to access it in the
field's mode, not the computed mode. */
if (volatilep
&& GET_CODE (op0) == MEM
&& flag_strict_volatile_bitfields > 0)
op0 = adjust_address (op0, mode1, 0);
field's mode, not the computed mode.
If a MEM has VOIDmode (external with incomplete type),
use BLKmode for it instead. */
if (MEM_P (op0))
{
if (volatilep && flag_strict_volatile_bitfields > 0)
op0 = adjust_address (op0, mode1, 0);
else if (GET_MODE (op0) == VOIDmode)
op0 = adjust_address (op0, BLKmode, 0);
}
mode2
= CONSTANT_P (op0) ? TYPE_MODE (TREE_TYPE (tem)) : GET_MODE (op0);

5
gcc/testsuite/ChangeLog
View file

@ -1,3 +1,8 @@
2010-11-11 Jakub Jelinek <jakub@redhat.com>
PR middle-end/46388
* gcc.c-torture/compile/pr46388.c: New test.
2010-11-11 Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE>
* lib/lto.exp (lto-get-options-main): Support optional target

14
gcc/testsuite/gcc.c-torture/compile/pr46388.c Normal file
View file

@ -0,0 +1,14 @@
/* PR middle-end/46388 */
struct S;
struct T
{
struct S *t;
};
extern struct S s, u;
void
foo (void)
{
((struct T *) &u)->t = &s;
}