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re PR c++/54583 (Spurious warning: value computed is not used with variable-size array)

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/cp
2012-10-31  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/54583
	* tree.c (build_cplus_array_type): Set TREE_NO_WARNING on the
	TYPE_SIZE of VLAs.

/testsuite
2012-10-31  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/54583
	* g++.dg/ext/vla13.C: New.

From-SVN: r193043
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Paolo Carlini 2012-10-31 19:14:39 +00:00 • committed by Paolo Carlini
parent 4d64ce5c05
commit 03d31730bf
4 changed files with 23 additions and 0 deletions
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6
gcc/cp/ChangeLog
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@ -1,3 +1,9 @@
2012-10-31 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/54583
* tree.c (build_cplus_array_type): Set TREE_NO_WARNING on the
TYPE_SIZE of VLAs.
2012-10-31 Dodji Seketeli <dodji@redhat.com>
PR c++/54955

4
gcc/cp/tree.c
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@ -824,6 +824,10 @@ build_cplus_array_type (tree elt_type, tree index_type)
}
}
/* Avoid spurious warnings with VLAs (c++/54583). */
if (TYPE_SIZE (t) && EXPR_P (TYPE_SIZE (t)))
TREE_NO_WARNING (TYPE_SIZE (t)) = 1;
/* Push these needs up so that initialization takes place
more easily. */
TYPE_NEEDS_CONSTRUCTING (t)

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2012-10-31 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/54583
* g++.dg/ext/vla13.C: New.
2012-10-31 Vladimir Makarov <vmakarov@redhat.com>
PR middle-end/55150

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gcc/testsuite/g++.dg/ext/vla13.C Normal file
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@ -0,0 +1,8 @@
// PR c++/54583
// { dg-options "-Wunused-value" }
void fred()
{
int n=10;
double (*x)[n];
}