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

re PR tree-optimization/33146 (ICE in build_polynomial_chrec, at tree-chrec.h:136)

Browse Source 
2007-09-22  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/33146
	* fold-const.c (fold_binary): Use the original tree
	for negating.
	* tree.h (STRIP_SIGN_NOPS): Converting from or to pointer
	also changes "sign".

	* gcc.c-torture/compile/pr33146.c: New testcase.

From-SVN: r128666
This commit is contained in:
Richard Guenther 2007-09-22 09:39:41 +00:00 committed by Richard Biener
parent 8deb1d3134
commit b9e67f8b4b
5 changed files with 39 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
gcc/ChangeLog
View File

@ -1,3 +1,11 @@
2007-09-22 Richard Guenther <rguenther@suse.de>
PR tree-optimization/33146
* fold-const.c (fold_binary): Use the original tree
for negating.
* tree.h (STRIP_SIGN_NOPS): Converting from or to pointer
also changes "sign".
2007-09-22 Eric Botcazou <ebotcazou@adacore.com>
PR target/32325

6
gcc/fold-const.c
View File

@ -10240,9 +10240,11 @@ fold_binary (enum tree_code code, tree type, tree op0, tree op1)
return omit_one_operand (type, arg1, arg0);
if (integer_onep (arg1))
return non_lvalue (fold_convert (type, arg0));
/* Transform x * -1 into -x. */
/* Transform x * -1 into -x. Make sure to do the negation
on the original operand with conversions not stripped
because we can only strip non-sign-changing conversions. */
if (integer_all_onesp (arg1))
return fold_convert (type, negate_expr (arg0));
return fold_convert (type, negate_expr (op0));
/* Transform x * -C into -x * C if x is easily negatable. */
if (TREE_CODE (arg1) == INTEGER_CST
&& tree_int_cst_sgn (arg1) == -1

5
gcc/testsuite/ChangeLog
View File

@ -1,3 +1,8 @@
2007-09-22 Richard Guenther <rguenther@suse.de>
PR tree-optimization/33146
* gcc.c-torture/compile/pr33146.c: New testcase.
2007-09-22 Richard Sandiford <rsandifo@nildram.co.uk>
* lib/target-supports.exp (check_cached_effective_target): New

19
gcc/testsuite/gcc.c-torture/compile/pr33146.c Normal file
View File

@ -0,0 +1,19 @@
typedef struct
{
int end;
int term;
}
jpc_enc_pass_t;
void foo(int numpasses, jpc_enc_pass_t *p)
{
jpc_enc_pass_t *pass;
jpc_enc_pass_t *termpass;
for (pass = p; pass != termpass; ++pass)
if (!pass->term)
{
termpass = pass;
while (termpass - pass < numpasses && !termpass->term)
++termpass;
pass->end = termpass->end;
}
}

4
gcc/tree.h
View File

@ -1019,7 +1019,9 @@ extern void omp_clause_range_check_failed (const_tree, const char *, int,
&& (TYPE_MODE (TREE_TYPE (EXP)) \
== TYPE_MODE (TREE_TYPE (TREE_OPERAND (EXP, 0)))) \
&& (TYPE_UNSIGNED (TREE_TYPE (EXP)) \
== TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (EXP, 0))))) \
== TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (EXP, 0)))) \
&& (POINTER_TYPE_P (TREE_TYPE (EXP)) \
== POINTER_TYPE_P (TREE_TYPE (TREE_OPERAND (EXP, 0))))) \
(EXP) = TREE_OPERAND (EXP, 0)
/* Like STRIP_NOPS, but don't alter the TREE_TYPE either. */