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| author | Bernd Schmidt <bernds@codesourcery.com> | 2011-10-05 12:59:23 +0000 |
|---|---|---|
| committer | Bernd Schmidt <bernds@gcc.gnu.org> | 2011-10-05 12:59:23 +0000 |
| commit | 484db665a35edd7c5e4112331665da4dfe57affd (patch) | |
| tree | 092a063b47d0bf2e253befae6fbbc597612758ed /gcc/function.h | |
| parent | 18474649d91dd922555c5af509206a7aa3c65285 (diff) | |
| download | gcc-484db665a35edd7c5e4112331665da4dfe57affd.zip gcc-484db665a35edd7c5e4112331665da4dfe57affd.tar.gz gcc-484db665a35edd7c5e4112331665da4dfe57affd.tar.bz2 | |
invoke.texi (-fshrink-wrap): Document.
* doc/invoke.texi (-fshrink-wrap): Document.
* opts.c (default_options_table): Add it.
* common.opt (fshrink-wrap): Add.
* function.c (emit_return_into_block): Remove useless declaration.
(record_hard_reg_uses_1, record_hard_reg_uses, frame_required_for_rtx,
requires_stack_frame_p, gen_return_pattern): New static functions.
(emit_return_into_block): New arg simple_p. All callers changed.
Use gen_return_pattern.
(thread_prologue_and_epilogue_insns): Implement shrink-wrapping.
* config/i386/i386.md (return): Expand into a simple_return.
(simple_return): New expander):
(simple_return_internal, simple_return_internal_long,
simple_return_pop_internal_long, simple_return_indirect_internal):
Renamed from return_internal, return_internal_long,
return_pop_internal_long and return_indirect_internal; changed to use
simple_return.
* config/i386/i386.c (ix86_expand_epilogue): Adjust to expand
simple returns.
(ix86_pad_returns): Likewise.
* function.h (struct rtl_data): Add member shrink_wrapped.
* cfgcleanup.c (outgoing_edges_match): If shrink-wrapped, edges that
are not jumps or sibcalls can't be compared.
* gcc.target/i386/sw-1.c: New test.
From-SVN: r179553
Diffstat (limited to 'gcc/function.h')
| -rw-r--r-- | gcc/function.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/gcc/function.h b/gcc/function.h index ff193bc..42e52ac 100644 --- a/gcc/function.h +++ b/gcc/function.h @@ -435,6 +435,9 @@ struct GTY(()) rtl_data { function where currently compiled version of it is nothrow. */ bool nothrow; + /* True if we performed shrink-wrapping for the current function. */ + bool shrink_wrapped; + /* Like regs_ever_live, but 1 if a reg is set or clobbered from an asm. Unlike regs_ever_live, elements of this array corresponding to eliminable regs (like the frame pointer) are set if an asm |