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[Bug tree-optimization/65443] New: Don't peel last iteration from loop in transform_to_exit_first_loop
- From: "vries at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 16 Mar 2015 15:45:35 +0000
- Subject: [Bug tree-optimization/65443] New: Don't peel last iteration from loop in transform_to_exit_first_loop
- Auto-submitted: auto-generated
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65443
Bug ID: 65443
Summary: Don't peel last iteration from loop in
transform_to_exit_first_loop
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: vries at gcc dot gnu.org
tree-parloops.c (
https://gcc.gnu.org/git/?p=gcc.git;a=blob;f=gcc/tree-parloops.c;h=fbb9eebddcf23e0c3498668e7aaa4708d302f255;hb=HEAD#l1503
):
...
TODO: the common case is that latch of the loop is empty and immediately
follows the loop exit. In this case, it would be better not to copy the
body of the loop, but only move the entry of the loop directly before the
exit check and increase the number of iterations of the loop by one.
This may need some additional preconditioning in case NIT = ~0.
REDUCTION_LIST describes the reductions in LOOP. */
static void
transform_to_exit_first_loop (struct loop *loop,
reduction_info_table_type *reduction_list,
tree nit)
...