OpenE2K/gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

c-family: Fix up MEM_REF printing [PR95580]

Browse Source 
The C FE in the MEM_REF printing ICEs if the type of the first argument
(which due to useless pointer conversions can be an arbitrary type) is a
pointer to an incomplete type.  The code just wants to avoid printing a cast
if it is a pointer to single byte elements.

2020-06-09  Jakub Jelinek  <jakub@redhat.com>

	PR c/95580
	* c-pretty-print.c (c_pretty_printer::unary_expression): Handle the
	case when MEM_REF's first argument has type pointer to incomplete type.

	* gcc.dg/pr95580.c: New test.
This commit is contained in:
Jakub Jelinek 2020-06-09 08:39:36 +02:00
parent 653ab08139
commit d6dbb71e46
2 changed files with 19 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
gcc/c-family/c-pretty-print.c
View File

@ -1789,8 +1789,9 @@ c_pretty_printer::unary_expression (tree e)
if (!integer_zerop (TREE_OPERAND (e, 1)))
{
pp_c_left_paren (this);
if (!integer_onep (TYPE_SIZE_UNIT
(TREE_TYPE (TREE_TYPE (TREE_OPERAND (e, 0))))))
tree type = TREE_TYPE (TREE_TYPE (TREE_OPERAND (e, 0)));
if (TYPE_SIZE_UNIT (type) == NULL_TREE
|| !integer_onep (TYPE_SIZE_UNIT (type)))
pp_c_type_cast (this, ptr_type_node);
}
pp_c_cast_expression (this, TREE_OPERAND (e, 0));

16
gcc/testsuite/gcc.dg/pr95580.c Normal file
View File

@ -0,0 +1,16 @@
/* PR c/95580 */
/* { dg-do compile } */
/* { dg-options "-O1 -W -fno-tree-dce" } */
void bar (void);
void
foo (int x)
{
if (x == 0)
{
void *p = __builtin_malloc (4);
((char *)p)[1] ^= 1; /* { dg-warning "may be used uninitialized" } */
}
bar ();
}