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Jakub Jelinek fbd28bc3b2 re PR tree-optimization/53265 (Warn when undefined behavior implies smaller iteration count) 
PR tree-optimization/53265
	* common.opt (Waggressive-loop-optimizations): New option.
	* tree-ssa-loop-niter.c: Include tree-pass.h.
	(do_warn_aggressive_loop_optimizations): New function.
	(record_estimate): Call it.  Don't add !is_exit bounds to loop->bounds
	if number_of_latch_executions returned constant.
	(estimate_numbers_of_iterations_loop): Call number_of_latch_executions
	early.  If number_of_latch_executions returned constant, set
	nb_iterations_upper_bound back to it.
	* cfgloop.h (struct loop): Add warned_aggressive_loop_optimizations
	field.
	* Makefile.in (tree-ssa-loop-niter.o): Depend on $(TREE_PASS_H).
	* doc/invoke.texi (-Wno-aggressive-loop-optimizations): Document.

	* gcc.dg/pr53265.c: New test.
	* gcc.dg/torture/pr49518.c: Add -Wno-aggressive-loop-optimizations
	to dg-options.
	* g++.dg/opt/longbranch2.C (EBCOTLut): Double sizes of a2 and a3
	arrays.
	* gcc.dg/tree-ssa/cunroll-10.c (main): Rename to foo.  Add argument
	n, use it as high bound instead of 4.

	* unwind-dw2.c (execute_cfa_program): Avoid
	-Waggressive-array-optimizations warnings for DW_CFA_GNU_window_save
	on targets with DWARF_FRAME_REGISTERS < 32.

	* testsuite/libmudflap.c/fail37-frag.c: Add optimization barrier.

From-SVN: r196650
2013-03-14 10:13:36 +01:00
..
testsuite re PR tree-optimization/53265 (Warn when undefined behavior implies smaller iteration count) 2013-03-14 10:13:36 +01:00
acinclude.m4 enable.m4: New file. 2005-09-23 16:33:47 +00:00
aclocal.m4 Update to Automake 1.11.1. 2010-04-02 18:18:06 +00:00
ChangeLog re PR tree-optimization/53265 (Warn when undefined behavior implies smaller iteration count) 2013-03-14 10:13:36 +01:00
config.h.in configure.ac: Don't create pth. 2011-07-13 14:57:29 +00:00
configure * configure: Regenerated. 2012-09-14 19:37:57 -04:00
configure.ac configure.ac: Don't create pth. 2011-07-13 14:57:29 +00:00
libtool-version libtool-version: New. 2004-07-05 19:08:30 +00:00
Makefile.am Update copyright in libmudflap. 2013-02-03 17:48:05 +00:00
Makefile.in no-dist in non-imported automake dirs. 2010-05-04 18:58:11 +00:00
mf-heuristics.c Update copyright in libmudflap. 2013-02-03 17:48:05 +00:00
mf-hooks1.c Update copyright in libmudflap. 2013-02-03 17:48:05 +00:00
mf-hooks2.c Update copyright in libmudflap. 2013-02-03 17:48:05 +00:00
mf-hooks3.c Update copyright in libmudflap. 2013-02-03 17:48:05 +00:00
mf-impl.h Update copyright in libmudflap. 2013-02-03 17:48:05 +00:00
mf-runtime.c Update copyright in libmudflap. 2013-02-03 17:48:05 +00:00
mf-runtime.h Update copyright in libmudflap. 2013-02-03 17:48:05 +00:00