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| author | Torsten Duwe <duwe@suse.de> | 2017-07-25 14:16:10 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2017-07-25 14:16:10 +0000 |
| commit | 417ca0117a1a9a8aaf5bc5ca530adfd68cb00399 (patch) | |
| tree | c8993d80cd0cc0675b2677e7902c261e0625dd63 /gcc/common.opt | |
| parent | 774cccdc1a36493ae6925148c08dfbdcb2789e0c (diff) | |
| download | gcc-417ca0117a1a9a8aaf5bc5ca530adfd68cb00399.zip gcc-417ca0117a1a9a8aaf5bc5ca530adfd68cb00399.tar.gz gcc-417ca0117a1a9a8aaf5bc5ca530adfd68cb00399.tar.bz2 | |
c-attribs.c (c_common_attribute_table): Add entry for "patchable_function_entry".
2017-07-07 Torsten Duwe <duwe@suse.de>
c-family/
* c-attribs.c (c_common_attribute_table): Add entry for
"patchable_function_entry".
lto/
* lto-lang.c (lto_attribute_table): Add entry for
"patchable_function_entry".
* common.opt: Introduce -fpatchable-function-entry
command line option, and its variables function_entry_patch_area_size
and function_entry_patch_area_start.
* opts.c (common_handle_option): Add -fpatchable_function_entry_ case,
including a two-value parser.
* target.def (print_patchable_function_entry): New target hook.
* targhooks.h (default_print_patchable_function_entry): New function.
* targhooks.c (default_print_patchable_function_entry): Likewise.
* toplev.c (process_options): Switch off IPA-RA if
patchable function entries are being generated.
* varasm.c (assemble_start_function): Look at the
patchable-function-entry command line switch and current
function attributes and maybe generate NOP instructions by
calling the print_patchable_function_entry hook.
* doc/extend.texi: Document patchable_function_entry attribute.
* doc/invoke.texi: Document -fpatchable_function_entry
command line option.
* doc/tm.texi.in (TARGET_ASM_PRINT_PATCHABLE_FUNCTION_ENTRY):
New target hook.
* doc/tm.texi: Re-generate.
* c-c++-common/patchable_function_entry-default.c: New test.
* c-c++-common/patchable_function_entry-decl.c: Likewise.
* c-c++-common/patchable_function_entry-definition.c: Likewise.
From-SVN: r250521
Diffstat (limited to 'gcc/common.opt')
| -rw-r--r-- | gcc/common.opt | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/gcc/common.opt b/gcc/common.opt index e81165c..78cfa56 100644 --- a/gcc/common.opt +++ b/gcc/common.opt @@ -163,6 +163,13 @@ bool flag_stack_usage_info = false Variable int flag_debug_asm +; How many NOP insns to place at each function entry by default +Variable +HOST_WIDE_INT function_entry_patch_area_size + +; And how far the real asm entry point is into this area +Variable +HOST_WIDE_INT function_entry_patch_area_start ; Balance between GNAT encodings and standard DWARF to emit. Variable @@ -2030,6 +2037,10 @@ fprofile-reorder-functions Common Report Var(flag_profile_reorder_functions) Enable function reordering that improves code placement. +fpatchable-function-entry= +Common Joined Optimization +Insert NOP instructions at each function entry. + frandom-seed Common Var(common_deferred_options) Defer |