r232897 - in /trunk/gcc: ChangeLog params.def t...
law@gcc.gnu.org
law@gcc.gnu.org
Wed Jan 27 19:19:00 GMT 2016
Author: law
Date: Wed Jan 27 19:19:47 2016
New Revision: 232897
URL: https://gcc.gnu.org/viewcvs?rev=232897&root=gcc&view=rev
Log:
PR tree-optimization/68398
* params.def (PARAM_FSM_SCALE_PATH_STMTS): New parameter.
(PARAM_FSM_SCALE_PATH_BLOCKS): Likewise.
* tree-ssa-threadbackward.c (fsm_find_control_statement_thread_paths):
Only count PHIs in the last block in the path. The others will
const/copy propagate away. Add heuristic to allow more irreducible
subloops to be created when it is likely profitable to do so.
* tree-ssa-threadbackward.c (fsm_find_control_statement_thread_paths):
Fix typo in comment. Use gsi_after_labels and remove the GIMPLE_LABEL
check from within the loop. Use gsi_next_nondebug rather than gsi_next.
PR tree-optimization/68398
* gcc.dg/tree-ssa/pr66752-3.c: Update expected output.
* gcc.dg/tree-ssa/ssa-dom-thread-2c.c: Add extra statements on thread
path to avoid new heuristic allowing more irreducible regions
* gcc.dg/tree-ssa/ssa-dom-thread-2d.c: Likewise.
* gcc.dg/tree-ssa/vrp46.c: Likewise.
* gcc.dg/tree-ssa/ssa-dom-thread-7.c: Update expected output.
* gcc.dg/tree-ssa/ssa-dom-thread-2g.c: New test.
* gcc.dg/tree-ssa/ssa-dom-thread-2h.c: Likewise.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-dom-thread-2g.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-dom-thread-2h.c
- copied, changed from r232894, trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-dom-thread-2d.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/params.def
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/tree-ssa/pr66752-3.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-dom-thread-2c.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-dom-thread-2d.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-dom-thread-7.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/vrp46.c
trunk/gcc/tree-ssa-threadbackward.c
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