mirror/gcc
2
0
Fork 0
mirror of git://gcc.gnu.org/git/gcc.git synced 2025-03-23 07:00:27 +08:00
Code Issues Packages Projects Releases Wiki Activity

re PR middle-end/54321 (ice in tree_low_cst at -O3)

Browse Source 
PR tree-optimization/54321
	* tree-ssa-forwprop.c (simplify_builtin_call): Pass 0 instead of 1
	as second argument to tree_low_cst call on val2.

	* gcc.c-torture/compile/pr54321.c: New test.

From-SVN: r190526
This commit is contained in:
Jakub Jelinek 2012-08-20 11:12:05 +02:00 committed by Jakub Jelinek
parent d17fd79ca1
commit 081db96050
4 changed files with 24 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
gcc/ChangeLog
View File

@ -1,3 +1,9 @@
2012-08-20 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/54321
* tree-ssa-forwprop.c (simplify_builtin_call): Pass 0 instead of 1
as second argument to tree_low_cst call on val2.
2012-08-20 Richard Guenther <rguenther@suse.de>
* gimple.h (gimple_statement_base): Annotate with GTY chain_next.

5
gcc/testsuite/ChangeLog
View File

@ -1,3 +1,8 @@
2012-08-20 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/54321
* gcc.c-torture/compile/pr54321.c: New test.
2012-08-20 Tobias Burnus <burnus@net-b.de>
PR fortran/54301

12
gcc/testsuite/gcc.c-torture/compile/pr54321.c Normal file
View File

@ -0,0 +1,12 @@
/* PR tree-optimization/54321 */
struct S { char s[0]; } *a;
void
foo (void)
{
char *b = a->s;
int c = 0;
b[0] = 0;
while (++c < 9)
b[c] = 255;
}

2
gcc/tree-ssa-forwprop.c
View File

@ -1554,7 +1554,7 @@ simplify_builtin_call (gimple_stmt_iterator *gsi_p, tree callee2)
else
src_buf[0] = tree_low_cst (src1, 0);
memset (src_buf + tree_low_cst (diff, 1),
tree_low_cst (val2, 1), tree_low_cst (len2, 1));
tree_low_cst (val2, 0), tree_low_cst (len2, 1));
src_buf[src_len] = '\0';
/* Neither builtin_strncpy_read_str nor builtin_memcpy_read_str
handle embedded '\0's. */