[NDS32] Have sibling calls optmization to be performed on nds32 target.
gcc/ * config/nds32/nds32-protos.h (nds32_expand_epilogue): Change prototype. (nds32_expand_epilogue_v3pop): Likewise. * config/nds32/nds32.md (sibcall): Define this for sibling call optimization. (sibcall_register): Likewise. (sibcall_immediate): Likewise. (sibcall_value): Likewise. (sibcall_value_register): Likewise. (sibcall_value_immediate): Likewise. (sibcall_epilogue): Likewise. (epilogue): Pass false to indicate this is not a sibcall epilogue. * config/nds32/nds32.c (nds32_expand_epilogue): Consider sibcall case. (nds32_expand_epilogue_v3pop): Likewise. From-SVN: r219712
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Chung-Ju Wu
Chung-Ju Wu
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03390cda42
commit
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4 changed files with 139 additions and 9 deletions
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@ -1,3 +1,20 @@
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2015-01-16 Chung-Ju Wu <jasonwucj@gmail.com>
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* config/nds32/nds32-protos.h (nds32_expand_epilogue): Change
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prototype.
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(nds32_expand_epilogue_v3pop): Likewise.
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* config/nds32/nds32.md (sibcall): Define this for sibling call
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optimization.
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(sibcall_register): Likewise.
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(sibcall_immediate): Likewise.
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(sibcall_value): Likewise.
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(sibcall_value_register): Likewise.
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(sibcall_value_immediate): Likewise.
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(sibcall_epilogue): Likewise.
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(epilogue): Pass false to indicate this is not a sibcall epilogue.
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* config/nds32/nds32.c (nds32_expand_epilogue): Consider sibcall case.
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(nds32_expand_epilogue_v3pop): Likewise.
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2015-01-16 Chung-Ju Wu <jasonwucj@gmail.com>
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* config/nds32/nds32-protos.h (nds32_can_use_return_insn): New.
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@ -58,9 +58,9 @@ extern void nds32_init_cumulative_args (CUMULATIVE_ARGS *,
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/* -- Function Entry and Exit. */
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extern void nds32_expand_prologue (void);
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extern void nds32_expand_epilogue (void);
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extern void nds32_expand_epilogue (bool);
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extern void nds32_expand_prologue_v3push (void);
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extern void nds32_expand_epilogue_v3pop (void);
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extern void nds32_expand_epilogue_v3pop (bool);
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/* ------------------------------------------------------------------------ */
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@ -3044,7 +3044,7 @@ nds32_expand_prologue (void)
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/* Function for normal multiple pop epilogue. */
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void
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nds32_expand_epilogue (void)
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nds32_expand_epilogue (bool sibcall_p)
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{
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int sp_adjust;
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int en4_const;
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@ -3089,7 +3089,8 @@ nds32_expand_epilogue (void)
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/* Generate return instruction by using 'return_internal' pattern.
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Make sure this instruction is after gen_blockage(). */
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emit_jump_insn (gen_return_internal ());
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if (!sibcall_p)
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emit_jump_insn (gen_return_internal ());
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return;
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}
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@ -3194,7 +3195,8 @@ nds32_expand_epilogue (void)
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}
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/* Generate return instruction. */
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emit_jump_insn (gen_return_internal ());
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if (!sibcall_p)
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emit_jump_insn (gen_return_internal ());
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}
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/* Function for v3push prologue. */
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@ -3327,7 +3329,7 @@ nds32_expand_prologue_v3push (void)
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/* Function for v3pop epilogue. */
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void
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nds32_expand_epilogue_v3pop (void)
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nds32_expand_epilogue_v3pop (bool sibcall_p)
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{
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int sp_adjust;
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@ -3348,7 +3350,8 @@ nds32_expand_epilogue_v3pop (void)
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{
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/* Generate return instruction by using 'return_internal' pattern.
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Make sure this instruction is after gen_blockage(). */
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emit_jump_insn (gen_return_internal ());
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if (!sibcall_p)
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emit_jump_insn (gen_return_internal ());
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return;
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}
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@ -1988,6 +1988,102 @@ create_template:
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(const_int 4)))])
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;; ----------------------------------------------------------------------------
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;; The sibcall patterns.
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;; sibcall
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;; sibcall_register
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;; sibcall_immediate
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(define_expand "sibcall"
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[(parallel [(call (match_operand 0 "memory_operand" "")
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(const_int 0))
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(clobber (reg:SI TA_REGNUM))
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(return)])]
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""
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""
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)
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(define_insn "*sibcall_register"
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[(parallel [(call (mem (match_operand:SI 0 "register_operand" "r, r"))
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(match_operand 1))
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(clobber (reg:SI TA_REGNUM))
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(return)])]
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""
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"@
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jr5\t%0
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jr\t%0"
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[(set_attr "type" "branch,branch")
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(set_attr "length" " 2, 4")])
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(define_insn "*sibcall_immediate"
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[(parallel [(call (mem (match_operand:SI 0 "immediate_operand" "i"))
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(match_operand 1))
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(clobber (reg:SI TA_REGNUM))
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(return)])]
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""
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{
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if (TARGET_CMODEL_LARGE)
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return "b\t%0";
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else
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return "j\t%0";
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}
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[(set_attr "type" "branch")
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(set (attr "length")
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(if_then_else (match_test "TARGET_CMODEL_LARGE")
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(const_int 12)
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(const_int 4)))])
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;; sibcall_value
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;; sibcall_value_register
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;; sibcall_value_immediate
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(define_expand "sibcall_value"
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[(parallel [(set (match_operand 0)
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(call (match_operand 1 "memory_operand" "")
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(const_int 0)))
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(clobber (reg:SI TA_REGNUM))
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(return)])]
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""
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""
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)
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(define_insn "*sibcall_value_register"
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[(parallel [(set (match_operand 0)
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(call (mem (match_operand:SI 1 "register_operand" "r, r"))
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(match_operand 2)))
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(clobber (reg:SI TA_REGNUM))
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(return)])]
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""
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"@
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jr5\t%1
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jr\t%1"
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[(set_attr "type" "branch,branch")
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(set_attr "length" " 2, 4")])
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(define_insn "*sibcall_value_immediate"
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[(parallel [(set (match_operand 0)
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(call (mem (match_operand:SI 1 "immediate_operand" "i"))
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(match_operand 2)))
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(clobber (reg:SI TA_REGNUM))
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(return)])]
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""
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{
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if (TARGET_CMODEL_LARGE)
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return "b\t%1";
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else
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return "j\t%1";
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}
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[(set_attr "type" "branch")
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(set (attr "length")
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(if_then_else (match_test "TARGET_CMODEL_LARGE")
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(const_int 12)
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(const_int 4)))])
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;; ----------------------------------------------------------------------------
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;; prologue and epilogue.
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(define_expand "prologue" [(const_int 0)]
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@ -2014,9 +2110,23 @@ create_template:
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if (TARGET_V3PUSH
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&& !nds32_isr_function_p (current_function_decl)
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&& (cfun->machine->va_args_size == 0))
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nds32_expand_epilogue_v3pop ();
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nds32_expand_epilogue_v3pop (false);
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else
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nds32_expand_epilogue ();
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nds32_expand_epilogue (false);
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DONE;
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})
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(define_expand "sibcall_epilogue" [(const_int 0)]
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""
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{
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/* Pass true to indicate that this is sibcall epilogue and
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exit from a function without the final branch back to the
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calling function. */
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if (TARGET_V3PUSH && !nds32_isr_function_p (current_function_decl))
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nds32_expand_epilogue_v3pop (true);
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else
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nds32_expand_epilogue (true);
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DONE;
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})
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