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| author | Jeffrey A Law <law@cygnus.com> | 2000-03-17 14:40:45 -0800 |
|---|---|---|
| committer | Richard Henderson <rth@gcc.gnu.org> | 2000-03-17 14:40:45 -0800 |
| commit | 0a1c58a25ab5df1a3e4596024774641ebae8be2a (patch) | |
| tree | 720b4c50b7ea074422601de35cfc7e48ed679e49 /gcc/rtl.h | |
| parent | f1fd8077fd1260362aa134deefc197948da270f8 (diff) | |
| download | gcc-0a1c58a25ab5df1a3e4596024774641ebae8be2a.zip gcc-0a1c58a25ab5df1a3e4596024774641ebae8be2a.tar.gz gcc-0a1c58a25ab5df1a3e4596024774641ebae8be2a.tar.bz2 | |
Sibling call optimizations.
Co-Authored-By: Richard Henderson <rth@cygnus.com>
From-SVN: r32612
Diffstat (limited to 'gcc/rtl.h')
| -rw-r--r-- | gcc/rtl.h | 22 |
1 files changed, 20 insertions, 2 deletions
@@ -119,9 +119,12 @@ typedef struct rtx_def #else enum machine_mode mode : 8; #endif - /* LINK_COST_ZERO in an INSN_LIST. */ + /* 1 in an INSN if it can alter flow of control + within this function. + LINK_COST_ZERO in an INSN_LIST. */ unsigned int jump : 1; - /* LINK_COST_FREE in an INSN_LIST. */ + /* 1 in an INSN if it can call another function. + LINK_COST_FREE in an INSN_LIST. */ unsigned int call : 1; /* 1 in a MEM or REG if value of this expression will never change during the current function, even though it is not @@ -380,6 +383,9 @@ extern void rtvec_check_failed_bounds PARAMS ((rtvec, int, /* 1 if insn is a call to a const function. */ #define CONST_CALL_P(INSN) ((INSN)->unchanging) +/* 1 if insn (assumed to be a CALL_INSN) is a sibling call. */ +#define SIBLING_CALL_P(INSN) ((INSN)->jump) + /* 1 if insn is a branch that should not unconditionally execute its delay slots, i.e., it is an annulled branch. */ #define INSN_ANNULLED_BRANCH_P(INSN) ((INSN)->unchanging) @@ -1416,6 +1422,7 @@ extern int rtx_renumbered_equal_p PARAMS ((rtx, rtx)); extern int true_regnum PARAMS ((rtx)); extern int redirect_jump PARAMS ((rtx, rtx)); extern void jump_optimize PARAMS ((rtx, int, int, int)); +extern void jump_optimize_minimal PARAMS ((rtx)); extern void rebuild_jump_labels PARAMS ((rtx)); extern void thread_jumps PARAMS ((rtx, int, int)); extern int redirect_exp PARAMS ((rtx *, rtx, rtx, rtx)); @@ -1513,6 +1520,7 @@ extern void record_excess_regs PARAMS ((rtx, rtx, rtx *)); extern void reposition_prologue_and_epilogue_notes PARAMS ((rtx)); extern void thread_prologue_and_epilogue_insns PARAMS ((rtx)); extern int prologue_epilogue_contains PARAMS ((rtx)); +extern int sibcall_epilogue_contains PARAMS ((rtx)); extern HOST_WIDE_INT get_frame_size PARAMS ((void)); extern void preserve_rtl_expr_result PARAMS ((rtx)); extern void mark_temp_addr_taken PARAMS ((rtx)); @@ -1713,6 +1721,16 @@ extern void record_base_value PARAMS ((int, rtx, int)); extern void record_alias_subset PARAMS ((int, int)); extern rtx addr_side_effect_eval PARAMS ((rtx, int, int)); +/* In sibcall.c */ +typedef enum { + sibcall_use_normal = 1, + sibcall_use_tail_recursion, + sibcall_use_sibcall +} sibcall_use_t; + +extern void optimize_sibling_and_tail_recursive_calls PARAMS ((void)); +extern void replace_call_placeholder PARAMS ((rtx, sibcall_use_t)); + #ifdef STACK_REGS extern int stack_regs_mentioned PARAMS ((rtx insn)); #endif |