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re PR lto/55660 (ICE instead of some warning during lto build with supplied different options (-funsigned-char vs none)) 

2012-12-13  Richard Biener  <rguenther@suse.de>

	PR lto/55660
	* tree-streamer.c (record_common_node): Check that we are not
	recursively pre-loading nodes we want to skip.  Handle
	char_type_node appearing as part of va_list_type_node.

	* gcc.dg/lto/pr55660_0.c: New testcase.
	* gcc.dg/lto/pr55660_1.c: Likewise.

From-SVN: r194473
This commit is contained in:
Richard Biener 2012-12-13 11:13:13 +00:00 committed by Richard Biener
parent af50fec7f5
commit 3ecce8a1ff
5 changed files with 49 additions and 0 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2012-12-13 Richard Biener <rguenther@suse.de>
PR lto/55660
* tree-streamer.c (record_common_node): Check that we are not
recursively pre-loading nodes we want to skip. Handle
char_type_node appearing as part of va_list_type_node.
2012-12-13 Jakub Jelinek <jakub@redhat.com>
PR gcov-profile/55650

6
gcc/testsuite/ChangeLog
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@ -1,3 +1,9 @@
2012-12-13 Richard Biener <rguenther@suse.de>
PR lto/55660
* gcc.dg/lto/pr55660_0.c: New testcase.
* gcc.dg/lto/pr55660_1.c: Likewise.
2012-12-13 Jakub Jelinek <jakub@redhat.com>
PR gcov-profile/55650

11
gcc/testsuite/gcc.dg/lto/pr55660_0.c Normal file
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@ -0,0 +1,11 @@
/* { dg-lto-do run } */
/* { dg-extra-ld-options { -funsigned-char } } */
char n[3] = {'a','b','c'};
int foo(char *x)
{
if (*x == 'b')
return (int)*x;
*x = 'y';
return 0;
}

15
gcc/testsuite/gcc.dg/lto/pr55660_1.c Normal file
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@ -0,0 +1,15 @@
extern int foo (char*);
extern void abort (void);
extern char n[3];
int main ()
{
int i, m = 0;
for (i = 0; i < 3; i++)
m += foo(&n[i]);
if (m != 'b')
abort ();
return 0;
}

10
gcc/tree-streamer.c
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@ -237,6 +237,16 @@ streamer_tree_cache_lookup (struct streamer_tree_cache_d *cache, tree t,
static void
record_common_node (struct streamer_tree_cache_d *cache, tree node)
{
/* If we recursively end up at nodes we do not want to preload simply don't.
??? We'd want to verify that this doesn't happen, or alternatively
do not recurse at all. */
if (node == char_type_node)
return;
gcc_checking_assert (node != boolean_type_node
&& node != boolean_true_node
&& node != boolean_false_node);
/* We have to make sure to fill exactly the same number of
elements for all frontends. That can include NULL trees.
As our hash table can't deal with zero entries we'll simply stream