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re PR c++/30847 (ICE with invalid statement expression)

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PR c++/30847
	* typeck.c (build_modify_expr): For COND_EXPR on LHS, if RHS has void
	type issue error and return early.

	* g++.dg/parse/cond3.C: New test.

From-SVN: r123456
This commit is contained in:
Jakub Jelinek 2007-04-03 11:08:00 +02:00 committed by Jakub Jelinek
parent 0a9430a831
commit df3473facb
4 changed files with 30 additions and 0 deletions
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6
gcc/cp/ChangeLog
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@ -1,3 +1,9 @@
2007-04-03 Jakub Jelinek <jakub@redhat.com>
PR c++/30847
* typeck.c (build_modify_expr): For COND_EXPR on LHS, if RHS has void
type issue error and return early.
2007-03-30 Jason Merrill <jason@redhat.com>
PR c++/31187

6
gcc/cp/typeck.c
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@ -5702,6 +5702,12 @@ build_modify_expr (tree lhs, enum tree_code modifycode, tree rhs)
tree cond;
tree preeval = NULL_TREE;
if (VOID_TYPE_P (TREE_TYPE (rhs)))
{
error ("void value not ignored as it ought to be");
return error_mark_node;
}
rhs = stabilize_expr (rhs, &preeval);
/* Check this here to avoid odd errors when trying to convert

3
gcc/testsuite/ChangeLog
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@ -1,5 +1,8 @@
2007-04-03 Jakub Jelinek <jakub@redhat.com>
PR c++/30847
* g++.dg/parse/cond3.C: New test.
PR middle-end/30704
* gcc.c-torture/execute/ieee/pr30704.c: New test.

15
gcc/testsuite/g++.dg/parse/cond3.C Normal file
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@ -0,0 +1,15 @@
// PR c++/30847
// { dg-do compile }
// { dg-options "" }
int j, k, l;
extern void baz ();
void
foo (int i)
{
(i ? j : k) = ({ l++; (void) l; }); // { dg-error "void value not ignored" }
(i ? j : k) += ({ l++; (void) l; }); // { dg-error "void value not ignored" }
(i ? j : k) = baz (); // { dg-error "void value not ignored" }
(i ? j : k) *= baz (); // { dg-error "void value not ignored" }
}