[Bug middle-end/53590] compiler fails to generate SIMD instruction for FP division
ebotcazou at gcc dot gnu.org
gcc-bugzilla@gcc.gnu.org
Fri Jun 15 09:22:00 GMT 2012
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53590
--- Comment #9 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2012-06-15 09:22:04 UTC ---
Author: ebotcazou
Date: Fri Jun 15 09:22:00 2012
New Revision: 188651
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=188651
Log:
PR middle-end/53590
* common.opt (-fdelete-dead-exceptions): New switch.
* doc/invoke.texi (Code Gen Options): Document it.
* cse.c (count_reg_usage) <CALL_INSN>: Use !insn_nothrow_p in lieu of
insn_could_throw_p predicate. Do not skip an insn that could throw
if dead exceptions can be deleted.
(insn_live_p): Likewise, do not return true in that case.
* dce.c (can_alter_cfg): New flag.
(deletable_insn_p): Do not return false for an insn that can throw if
the CFG can be altered and dead exceptions can be deleted.
(init_dce): Set can_alter_cfg to false for fast DCE, true otherwise.
* dse.c (scan_insn): Use !insn_nothrow_p in lieu of insn_could_throw_
predicate. Do not preserve an insn that could throw if dead exceptions
can be deleted.
* function.h (struct function): Add can_delete_dead_exceptions flag.
* function.c (allocate_struct_function): Set it.
* lto-streamer-in.c (input_struct_function_base): Stream it.
* lto-streamer-out.c (input_struct_function_base): Likewise.
* tree-ssa-dce.c (mark_stmt_if_obviously_necessary): Do not mark a
statement that could throw as necessary if dead exceptions can be
deleted.
ada/
* gcc-interface/misc.c (gnat_init_options_struct): Set
opts->x_flag_delete_dead_exceptions to 1.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/ada/ChangeLog
trunk/gcc/ada/gcc-interface/misc.c
trunk/gcc/common.opt
trunk/gcc/cse.c
trunk/gcc/dce.c
trunk/gcc/doc/invoke.texi
trunk/gcc/dse.c
trunk/gcc/function.c
trunk/gcc/function.h
trunk/gcc/lto-streamer-in.c
trunk/gcc/lto-streamer-out.c
trunk/gcc/tree-ssa-dce.c
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