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re PR c++/82600 (Address of local variable returned [-Werror=return-local-addr] when building mozilla-central)

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PR c++/82600
	* typeck.c (check_return_expr): Don't call
	maybe_warn_about_returning_address_of_local in templates.

	* g++.dg/warn/Wreturn-local-addr-4.C: New test.

From-SVN: r253899
This commit is contained in:
Jakub Jelinek 2017-10-19 16:24:39 +02:00 • committed by Jakub Jelinek
parent db62ad7c66
commit d969783705
4 changed files with 31 additions and 1 deletions
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6
gcc/cp/ChangeLog
View file

@ -1,3 +1,9 @@
2017-10-19 Jakub Jelinek <jakub@redhat.com>
PR c++/82600
* typeck.c (check_return_expr): Don't call
maybe_warn_about_returning_address_of_local in templates.
2017-10-17 Nathan Sidwell <nathan@acm.org>
PR c++/82560

3
gcc/cp/typeck.c
View file

@ -9228,7 +9228,8 @@ check_return_expr (tree retval, bool *no_warning)
&& TREE_CODE (TREE_OPERAND (retval, 1)) == AGGR_INIT_EXPR)
retval = build2 (COMPOUND_EXPR, TREE_TYPE (retval), retval,
TREE_OPERAND (retval, 0));
else if (maybe_warn_about_returning_address_of_local (retval))
else if (!processing_template_decl
&& maybe_warn_about_returning_address_of_local (retval))
retval = build2 (COMPOUND_EXPR, TREE_TYPE (retval), retval,
build_zero_cst (TREE_TYPE (retval)));
}

5
gcc/testsuite/ChangeLog
View file

@ -1,3 +1,8 @@
2017-10-19 Jakub Jelinek <jakub@redhat.com>
PR c++/82600
* g++.dg/warn/Wreturn-local-addr-4.C: New test.
2017-10-19 Eric Botcazou <ebotcazou@adacore.com>
* gcc.dg/debug/dwarf2/sso.c: Rename into...

18
gcc/testsuite/g++.dg/warn/Wreturn-local-addr-4.C Normal file
View file

@ -0,0 +1,18 @@
// PR c++/82600
// { dg-do compile }
void *b[10];
template <int N>
void **
foo (int x)
{
void **a = b; // { dg-bogus "address of local variable 'a' returned" }
return &a[x];
}
void **
bar (int x)
{
return foo <0> (x);
}