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| author | Eric Botcazou <ebotcazou@adacore.com> | 2012-06-15 09:22:00 +0000 |
|---|---|---|
| committer | Eric Botcazou <ebotcazou@gcc.gnu.org> | 2012-06-15 09:22:00 +0000 |
| commit | 2da02156af964dbd197f19cbd7fea003a73aacb3 (patch) | |
| tree | 25c62c51c178ea6a10880eb537b869fdb857970d /gcc/common.opt | |
| parent | 6724292e72a9bdbafb0d95587740378f36036707 (diff) | |
| download | gcc-2da02156af964dbd197f19cbd7fea003a73aacb3.zip gcc-2da02156af964dbd197f19cbd7fea003a73aacb3.tar.gz gcc-2da02156af964dbd197f19cbd7fea003a73aacb3.tar.bz2 | |
re PR middle-end/53590 (compiler fails to generate SIMD instruction for FP division)
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.
From-SVN: r188651
Diffstat (limited to 'gcc/common.opt')
| -rw-r--r-- | gcc/common.opt | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/gcc/common.opt b/gcc/common.opt index 5b1b4d8..2a14f18 100644 --- a/gcc/common.opt +++ b/gcc/common.opt @@ -979,6 +979,10 @@ fdelayed-branch Common Report Var(flag_delayed_branch) Optimization Attempt to fill delay slots of branch instructions +fdelete-dead-exceptions +Common Report Var(flag_delete_dead_exceptions) Init(0) +Delete dead instructions that may throw exceptions + fdelete-null-pointer-checks Common Report Var(flag_delete_null_pointer_checks) Init(1) Optimization Delete useless null pointer checks |