mirror/gcc
2
0
Fork 0
mirror of git://gcc.gnu.org/git/gcc.git synced 2025-04-09 21:23:03 +08:00
Code Issues Packages Projects Releases Wiki Activity

Mark 2nd argument of delete operator as needed (PR tree-optimization/91270).

Browse Source 
2019-07-30  Martin Liska  <mliska@suse.cz>

	PR tree-optimization/91270
	* tree-ssa-dce.c (propagate_necessity): Mark 2nd argument
	of delete operator as needed.
2019-07-30  Martin Liska  <mliska@suse.cz>

	PR tree-optimization/91270
	* g++.dg/torture/pr91270.C: New test.

From-SVN: r273906
This commit is contained in:
Martin Liska 2019-07-30 13:00:35 +02:00 committed by Martin Liska
parent c1b3d82783
commit 1da8ab97a1
4 changed files with 37 additions and 5 deletions
gcc
cp
ChangeLog
testsuite
ChangeLog
g++.dg/torture
pr91270.C
tree-ssa-dce.c

6
gcc/cp/ChangeLog

@ -1,3 +1,9 @@
2019-07-30 Martin Liska <mliska@suse.cz>
PR tree-optimization/91270
* tree-ssa-dce.c (propagate_necessity): Mark 2nd argument
of delete operator as needed.
2019-07-25 Martin Liska <mliska@suse.cz>
Dominik Infuhr <dominik.infuehr@theobroma-systems.com>

5
gcc/testsuite/ChangeLog

@ -1,3 +1,8 @@
2019-07-30 Martin Liska <mliska@suse.cz>
PR tree-optimization/91270
* g++.dg/torture/pr91270.C: New test.
2019-07-30 Richard Sandiford <richard.sandiford@arm.com>
* gcc.dg/vect/vect-cond-arith-7.c: New test.

10
gcc/testsuite/g++.dg/torture/pr91270.C Normal file

@ -0,0 +1,10 @@
/* { dg-do compile } */
struct S {
~S();
};
int a = 123;
void fn1() {
S *s = new S[a];
delete[] s;
}

21
gcc/tree-ssa-dce.c

@ -804,10 +804,11 @@ propagate_necessity (bool aggressive)
/* If this is a call to free which is directly fed by an
allocation function do not mark that necessary through
processing the argument. */
if (gimple_call_builtin_p (stmt, BUILT_IN_FREE)
|| (is_gimple_call (stmt)
&& gimple_call_operator_delete_p (as_a <gcall *> (stmt))))
bool is_delete_operator
= (is_gimple_call (stmt)
&& gimple_call_operator_delete_p (as_a <gcall *> (stmt)));
if (is_delete_operator
|| gimple_call_builtin_p (stmt, BUILT_IN_FREE))
{
tree ptr = gimple_call_arg (stmt, 0);
gimple *def_stmt;
@ -822,7 +823,17 @@ propagate_necessity (bool aggressive)
|| DECL_FUNCTION_CODE (def_callee) == BUILT_IN_MALLOC
|| DECL_FUNCTION_CODE (def_callee) == BUILT_IN_CALLOC))
|| DECL_IS_REPLACEABLE_OPERATOR_NEW_P (def_callee)))
continue;
{
/* Some delete operators have size as 2nd argument. */
if (is_delete_operator && gimple_call_num_args (stmt) >= 2)
{
tree size_argument = gimple_call_arg (stmt, 1);
if (TREE_CODE (size_argument) == SSA_NAME)
mark_operand_necessary (size_argument);
}
continue;
}
}
FOR_EACH_SSA_TREE_OPERAND (use, stmt, iter, SSA_OP_USE)