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re PR tree-optimization/21610 (ICE in make_decl_rtl)

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PR tree-optimization/21610
	* c-typeck.c (decl_constant_value_for_broken_optimization): If not
	returning DECL, call unshare_expr.

	* gcc.c-torture/compile/20050516-1.c: New test.

From-SVN: r99815
This commit is contained in:
Jakub Jelinek 2005-05-17 08:45:49 +02:00 • committed by Jakub Jelinek
parent 22c3c0917f
commit c477e13bd7
4 changed files with 31 additions and 2 deletions
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6
gcc/ChangeLog
View file

@ -1,3 +1,9 @@
2005-05-17 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/21610
* c-typeck.c (decl_constant_value_for_broken_optimization): If not
returning DECL, call unshare_expr.
2005-05-17 Hans-Peter Nilsson <hp@axis.com>
* config/cris/cris.md: Unquote preparation and output statements.

12
gcc/c-typeck.c
View file

@ -1249,10 +1249,18 @@ decl_constant_value (tree decl)
static tree
decl_constant_value_for_broken_optimization (tree decl)
{
tree ret;
if (pedantic || DECL_MODE (decl) == BLKmode)
return decl;
else
return decl_constant_value (decl);
ret = decl_constant_value (decl);
/* Avoid unwanted tree sharing between the initializer and current
function's body where the tree can be modified e.g. by the
gimplifier. */
if (ret != decl && TREE_STATIC (decl))
ret = unshare_expr (ret);
return ret;
}

3
gcc/testsuite/ChangeLog
View file

@ -1,5 +1,8 @@
2005-05-17 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/21610
* gcc.c-torture/compile/20050516-1.c: New test.
PR fortran/15080
* gfortran.fortran-torture/execute/forall_3.f90: Remove comment
about the test failing.

12
gcc/testsuite/gcc.c-torture/compile/20050516-1.c Normal file
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@ -0,0 +1,12 @@
/* PR tree-optimization/21610 */
struct S { char s; };
struct T { struct S t; };
struct S *const p = &((struct T * const) (0x4000))->t;
void
foo (void)
{
p->s = 0;
}