function.h
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invoke.texi (-fshrink-wrap): Document. · 484db665
* 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
Bernd Schmidt committed