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re PR tree-optimization/55955 (ICE in optab_for_tree_code, at optabs.c:402) 

PR tree-optimization/55955
	* tree-vect-loop.c (vectorizable_reduction): Give up early on
	*SHIFT_EXPR and *ROTATE_EXPR codes.

	* gcc.c-torture/compile/pr55955.c: New test.

From-SVN: r195190
This commit is contained in:
Jakub Jelinek 2013-01-15 10:31:28 +01:00 committed by Jakub Jelinek
parent cd61690f63
commit ff7848297e
4 changed files with 32 additions and 0 deletions
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4
gcc/ChangeLog
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@ -1,5 +1,9 @@
2013-01-15 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/55955
* tree-vect-loop.c (vectorizable_reduction): Give up early on
*SHIFT_EXPR and *ROTATE_EXPR codes.
PR tree-optimization/48766
* opts.c (common_handle_option): For -fwrapv disable -ftrapv, for
-ftrapv disable -fwrapv.

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2013-01-15 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/55955
* gcc.c-torture/compile/pr55955.c: New test.
2013-01-15 Dodji Seketeli <dodji@redhat.com>
PR c++/55663

12
gcc/testsuite/gcc.c-torture/compile/pr55955.c Normal file
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@ -0,0 +1,12 @@
/* PR tree-optimization/55955 */
int b;
void
foo (int x)
{
int a;
for (a = x; a < 2; a++)
for (b = 0; b < 2; b++)
*(unsigned short *) 0x100000UL %= 46;
}

11
gcc/tree-vect-loop.c
View File

@ -4776,6 +4776,17 @@ vectorizable_reduction (gimple stmt, gimple_stmt_iterator *gsi,
{
/* 4. Supportable by target? */
if (code == LSHIFT_EXPR || code == RSHIFT_EXPR
|| code == LROTATE_EXPR || code == RROTATE_EXPR)
{
/* Shifts and rotates are only supported by vectorizable_shifts,
not vectorizable_reduction. */
if (dump_enabled_p ())
dump_printf_loc (MSG_MISSED_OPTIMIZATION, vect_location,
"unsupported shift or rotation.");
return false;
}
/* 4.1. check support for the operation in the loop */
optab = optab_for_tree_code (code, vectype_in, optab_default);
if (!optab)