diff options
author | Sylvain Boulmé <sylvain.boulme@univ-grenoble-alpes.fr> | 2021-03-23 19:12:19 +0100 |
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committer | Sylvain Boulmé <sylvain.boulme@univ-grenoble-alpes.fr> | 2021-03-23 19:12:19 +0100 |
commit | dcb523736e82d72b03fa8d055bf74472dba7345c (patch) | |
tree | 71e797c92d45dca509527043d233c51b2ed8fc86 /x86 | |
parent | 3e953ef41f736ed5b7db699b1adf21d46cb5b8db (diff) | |
parent | 6bf310dd678285dc193798e89fc2c441d8430892 (diff) | |
download | compcert-kvx-dcb523736e82d72b03fa8d055bf74472dba7345c.tar.gz compcert-kvx-dcb523736e82d72b03fa8d055bf74472dba7345c.zip |
Merge branch 'master' into merge_master_8.13.1
PARTIAL MERGE (PARTLY BROKEN).
See unsolved conflicts in: aarch64/TO_MERGE and riscV/TO_MERGE
WARNING:
interface of va_args and assembly sections have changed
Diffstat (limited to 'x86')
-rw-r--r-- | x86/Asm.v | 2 | ||||
-rw-r--r-- | x86/Asmexpand.ml | 4 | ||||
-rw-r--r-- | x86/Asmgenproof.v | 10 | ||||
-rw-r--r-- | x86/ConstpropOpproof.v | 2 | ||||
-rw-r--r-- | x86/Conventions1.v | 37 | ||||
-rw-r--r-- | x86/NeedOp.v | 12 | ||||
-rw-r--r-- | x86/SelectOpproof.v | 10 | ||||
-rw-r--r-- | x86/Stacklayout.v | 56 | ||||
-rw-r--r-- | x86/TargetPrinter.ml | 21 | ||||
-rw-r--r-- | x86/extractionMachdep.v | 2 |
10 files changed, 80 insertions, 76 deletions
@@ -1193,7 +1193,7 @@ Ltac Equalities := split. auto. intros. destruct B; auto. subst. auto. - (* trace length *) red; intros; inv H; simpl. - omega. + lia. eapply external_call_trace_length; eauto. eapply external_call_trace_length; eauto. - (* initial states *) diff --git a/x86/Asmexpand.ml b/x86/Asmexpand.ml index 20f5d170..ecdf97f7 100644 --- a/x86/Asmexpand.ml +++ b/x86/Asmexpand.ml @@ -500,7 +500,7 @@ let expand_builtin_inline name args res = unprototyped. *) let fixup_funcall_elf64 sg = - if sg.sig_cc.cc_vararg || sg.sig_cc.cc_unproto then begin + if sg.sig_cc.cc_vararg <> None || sg.sig_cc.cc_unproto then begin let (ir, fr, ofs) = next_arg_locations 0 0 0 sg.sig_args in emit (Pmovl_ri (RAX, coqint_of_camlint (Int32.of_int fr))) end @@ -521,7 +521,7 @@ let rec copy_fregs_to_iregs args fr ir = () let fixup_funcall_win64 sg = - if sg.sig_cc.cc_vararg then + if sg.sig_cc.cc_vararg <> None then copy_fregs_to_iregs sg.sig_args [XMM0; XMM1; XMM2; XMM3] [RCX; RDX; R8; R9] let fixup_funcall sg = diff --git a/x86/Asmgenproof.v b/x86/Asmgenproof.v index 6886b2fd..8c28fb1b 100644 --- a/x86/Asmgenproof.v +++ b/x86/Asmgenproof.v @@ -67,7 +67,7 @@ Lemma transf_function_no_overflow: transf_function f = OK tf -> list_length_z (fn_code tf) <= Ptrofs.max_unsigned. Proof. intros. monadInv H. destruct (zlt Ptrofs.max_unsigned (list_length_z (fn_code x))); monadInv EQ0. - omega. + lia. Qed. Lemma exec_straight_exec: @@ -332,8 +332,8 @@ Proof. split. unfold goto_label. rewrite P. rewrite H1. auto. split. rewrite Pregmap.gss. constructor; auto. rewrite Ptrofs.unsigned_repr. replace (pos' - 0) with pos' in Q. - auto. omega. - generalize (transf_function_no_overflow _ _ H0). omega. + auto. lia. + generalize (transf_function_no_overflow _ _ H0). lia. intros. apply Pregmap.gso; auto. Qed. @@ -858,7 +858,7 @@ Transparent destroyed_by_jumptable. econstructor; eauto. unfold nextinstr. rewrite Pregmap.gss. repeat rewrite Pregmap.gso; auto with asmgen. rewrite ATPC. simpl. constructor; eauto. - unfold fn_code. eapply code_tail_next_int. simpl in g. omega. + unfold fn_code. eapply code_tail_next_int. simpl in g. lia. constructor. apply agree_nextinstr. eapply agree_change_sp; eauto. Transparent destroyed_at_function_entry. @@ -883,7 +883,7 @@ Transparent destroyed_at_function_entry. - (* return *) inv STACKS. simpl in *. - right. split. omega. split. auto. + right. split. lia. split. auto. econstructor; eauto. rewrite ATPC; eauto. congruence. Qed. diff --git a/x86/ConstpropOpproof.v b/x86/ConstpropOpproof.v index 82179fa4..09c6e91b 100644 --- a/x86/ConstpropOpproof.v +++ b/x86/ConstpropOpproof.v @@ -532,7 +532,7 @@ Proof. Int.bit_solve. destruct (zlt i0 n0). replace (Int.testbit n i0) with (negb (Int.testbit Int.zero i0)). rewrite Int.bits_zero. simpl. rewrite andb_true_r. auto. - rewrite <- EQ. rewrite Int.bits_zero_ext by omega. rewrite zlt_true by auto. + rewrite <- EQ. rewrite Int.bits_zero_ext by lia. rewrite zlt_true by auto. rewrite Int.bits_not by auto. apply negb_involutive. rewrite H6 by auto. auto. econstructor; split; eauto. auto. diff --git a/x86/Conventions1.v b/x86/Conventions1.v index b4cb233e..b6fb2620 100644 --- a/x86/Conventions1.v +++ b/x86/Conventions1.v @@ -303,14 +303,14 @@ Remark loc_arguments_32_charact: In p (loc_arguments_32 tyl ofs) -> forall_rpair (loc_argument_32_charact ofs) p. Proof. assert (X: forall ofs1 ofs2 l, loc_argument_32_charact ofs2 l -> ofs1 <= ofs2 -> loc_argument_32_charact ofs1 l). - { destruct l; simpl; intros; auto. destruct sl; auto. intuition omega. } + { destruct l; simpl; intros; auto. destruct sl; auto. intuition lia. } induction tyl as [ | ty tyl]; simpl loc_arguments_32; intros. - contradiction. - destruct H. -+ destruct ty; subst p; simpl; omega. ++ destruct ty; subst p; simpl; lia. + apply IHtyl in H. generalize (typesize_pos ty); intros. destruct p; simpl in *. -* eapply X; eauto; omega. -* destruct H; split; eapply X; eauto; omega. +* eapply X; eauto; lia. +* destruct H; split; eapply X; eauto; lia. Qed. Remark loc_arguments_elf64_charact: @@ -318,7 +318,7 @@ Remark loc_arguments_elf64_charact: In p (loc_arguments_elf64 tyl ir fr ofs) -> (2 | ofs) -> forall_rpair (loc_argument_elf64_charact ofs) p. Proof. assert (X: forall ofs1 ofs2 l, loc_argument_elf64_charact ofs2 l -> ofs1 <= ofs2 -> loc_argument_elf64_charact ofs1 l). - { destruct l; simpl; intros; auto. destruct sl; auto. intuition omega. } + { destruct l; simpl; intros; auto. destruct sl; auto. intuition lia. } assert (Y: forall ofs1 ofs2 p, forall_rpair (loc_argument_elf64_charact ofs2) p -> ofs1 <= ofs2 -> forall_rpair (loc_argument_elf64_charact ofs1) p). { destruct p; simpl; intuition eauto. } assert (Z: forall ofs, (2 | ofs) -> (2 | ofs + 2)). @@ -335,8 +335,8 @@ Opaque list_nth_z. { intros. destruct (list_nth_z int_param_regs_elf64 ir) as [r|] eqn:E; destruct H1. subst. left. eapply list_nth_z_in; eauto. eapply IHtyl; eauto. - subst. split. omega. assumption. - eapply Y; eauto. omega. } + subst. split. lia. assumption. + eapply Y; eauto. lia. } assert (B: forall ty, In p match list_nth_z float_param_regs_elf64 fr with | Some ireg => One (R ireg) :: loc_arguments_elf64 tyl ir (fr + 1) ofs @@ -346,8 +346,8 @@ Opaque list_nth_z. { intros. destruct (list_nth_z float_param_regs_elf64 fr) as [r|] eqn:E; destruct H1. subst. right. eapply list_nth_z_in; eauto. eapply IHtyl; eauto. - subst. split. omega. assumption. - eapply Y; eauto. omega. } + subst. split. lia. assumption. + eapply Y; eauto. lia. } destruct a; eauto. Qed. @@ -356,7 +356,7 @@ Remark loc_arguments_win64_charact: In p (loc_arguments_win64 tyl r ofs) -> (2 | ofs) -> forall_rpair (loc_argument_win64_charact ofs) p. Proof. assert (X: forall ofs1 ofs2 l, loc_argument_win64_charact ofs2 l -> ofs1 <= ofs2 -> loc_argument_win64_charact ofs1 l). - { destruct l; simpl; intros; auto. destruct sl; auto. intuition omega. } + { destruct l; simpl; intros; auto. destruct sl; auto. intuition lia. } assert (Y: forall ofs1 ofs2 p, forall_rpair (loc_argument_win64_charact ofs2) p -> ofs1 <= ofs2 -> forall_rpair (loc_argument_win64_charact ofs1) p). { destruct p; simpl; intuition eauto. } assert (Z: forall ofs, (2 | ofs) -> (2 | ofs + 2)). @@ -373,8 +373,8 @@ Opaque list_nth_z. { intros. destruct (list_nth_z int_param_regs_win64 r) as [r'|] eqn:E; destruct H1. subst. left. eapply list_nth_z_in; eauto. eapply IHtyl; eauto. - subst. split. omega. assumption. - eapply Y; eauto. omega. } + subst. split. lia. assumption. + eapply Y; eauto. lia. } assert (B: forall ty, In p match list_nth_z float_param_regs_win64 r with | Some ireg => One (R ireg) :: loc_arguments_win64 tyl (r + 1) ofs @@ -384,8 +384,8 @@ Opaque list_nth_z. { intros. destruct (list_nth_z float_param_regs_win64 r) as [r'|] eqn:E; destruct H1. subst. right. eapply list_nth_z_in; eauto. eapply IHtyl; eauto. - subst. split. omega. assumption. - eapply Y; eauto. omega. } + subst. split. lia. assumption. + eapply Y; eauto. lia. } destruct a; eauto. Qed. @@ -424,7 +424,7 @@ Proof. unfold forall_rpair; destruct p; intuition auto. Qed. -Hint Resolve loc_arguments_acceptable: locs. +Global Hint Resolve loc_arguments_acceptable: locs. Lemma loc_arguments_main: loc_arguments signature_main = nil. @@ -432,7 +432,7 @@ Proof. unfold loc_arguments; destruct Archi.ptr64; auto; destruct Archi.win64; auto. Qed. -(** ** Normalization of function results *) +(** ** Normalization of function results and parameters *) (** In the x86 ABI, a return value of type "char" is returned in register AL, leaving the top 24 bits of EAX unspecified. @@ -445,3 +445,8 @@ Definition return_value_needs_normalization (t: rettype) : bool := | Tint8signed | Tint8unsigned | Tint16signed | Tint16unsigned => true | _ => false end. + +(** Function parameters are passed in normalized form and do not need + to be re-normalized at function entry. *) + +Definition parameter_needs_normalization (t: rettype) := false. diff --git a/x86/NeedOp.v b/x86/NeedOp.v index d9a58fbb..775a23db 100644 --- a/x86/NeedOp.v +++ b/x86/NeedOp.v @@ -206,9 +206,9 @@ Proof. unfold needs_of_operation; intros; destruct op; try (eapply default_needs_of_operation_sound; eauto; fail); simpl in *; FuncInv; InvAgree; TrivialExists. - apply sign_ext_sound; auto. compute; auto. -- apply zero_ext_sound; auto. omega. +- apply zero_ext_sound; auto. lia. - apply sign_ext_sound; auto. compute; auto. -- apply zero_ext_sound; auto. omega. +- apply zero_ext_sound; auto. lia. - apply neg_sound; auto. - apply mul_sound; auto. - apply mul_sound; auto with na. @@ -246,10 +246,10 @@ Lemma operation_is_redundant_sound: vagree v arg1' nv. Proof. intros. destruct op; simpl in *; try discriminate; inv H1; FuncInv; subst. -- apply sign_ext_redundant_sound; auto. omega. -- apply zero_ext_redundant_sound; auto. omega. -- apply sign_ext_redundant_sound; auto. omega. -- apply zero_ext_redundant_sound; auto. omega. +- apply sign_ext_redundant_sound; auto. lia. +- apply zero_ext_redundant_sound; auto. lia. +- apply sign_ext_redundant_sound; auto. lia. +- apply zero_ext_redundant_sound; auto. lia. - apply andimm_redundant_sound; auto. - apply orimm_redundant_sound; auto. Qed. diff --git a/x86/SelectOpproof.v b/x86/SelectOpproof.v index af1d4e08..c43beb56 100644 --- a/x86/SelectOpproof.v +++ b/x86/SelectOpproof.v @@ -385,9 +385,9 @@ Proof. - TrivialExists. simpl. rewrite Int.and_commut; auto. - TrivialExists. simpl. rewrite Val.and_assoc. rewrite Int.and_commut. auto. - rewrite Val.zero_ext_and. TrivialExists. rewrite Val.and_assoc. - rewrite Int.and_commut. auto. omega. + rewrite Int.and_commut. auto. lia. - rewrite Val.zero_ext_and. TrivialExists. rewrite Val.and_assoc. - rewrite Int.and_commut. auto. omega. + rewrite Int.and_commut. auto. lia. - TrivialExists. Qed. @@ -747,7 +747,7 @@ Proof. red; intros until x. unfold cast8unsigned. destruct (cast8unsigned_match a); intros; InvEval. TrivialExists. subst. rewrite Val.zero_ext_and. rewrite Val.and_assoc. - rewrite Int.and_commut. apply eval_andimm; auto. omega. + rewrite Int.and_commut. apply eval_andimm; auto. lia. TrivialExists. Qed. @@ -763,7 +763,7 @@ Proof. red; intros until x. unfold cast16unsigned. destruct (cast16unsigned_match a); intros; InvEval. TrivialExists. subst. rewrite Val.zero_ext_and. rewrite Val.and_assoc. - rewrite Int.and_commut. apply eval_andimm; auto. omega. + rewrite Int.and_commut. apply eval_andimm; auto. lia. TrivialExists. Qed. @@ -864,7 +864,7 @@ Proof. simpl. rewrite Heqo; reflexivity. simpl. unfold Int64.loword. rewrite Int64.unsigned_repr, Int.repr_unsigned; auto. assert (Int.modulus < Int64.max_unsigned) by reflexivity. - generalize (Int.unsigned_range n); omega. + generalize (Int.unsigned_range n); lia. Qed. Theorem eval_floatofintu: diff --git a/x86/Stacklayout.v b/x86/Stacklayout.v index 4f68cf26..002b86bf 100644 --- a/x86/Stacklayout.v +++ b/x86/Stacklayout.v @@ -69,16 +69,16 @@ Local Opaque Z.add Z.mul sepconj range. set (ostkdata := align (ol + 4 * b.(bound_local)) 8). set (oretaddr := align (ostkdata + b.(bound_stack_data)) w). replace (size_chunk Mptr) with w by (rewrite size_chunk_Mptr; auto). - assert (0 < w) by (unfold w; destruct Archi.ptr64; omega). + assert (0 < w) by (unfold w; destruct Archi.ptr64; lia). generalize b.(bound_local_pos) b.(bound_outgoing_pos) b.(bound_stack_data_pos); intros. - assert (0 <= fe_ofs_arg) by (unfold fe_ofs_arg; destruct Archi.win64; omega). - assert (0 <= 4 * b.(bound_outgoing)) by omega. - assert (fe_ofs_arg + 4 * b.(bound_outgoing) <= olink) by (apply align_le; omega). - assert (olink + w <= ocs) by (unfold ocs; omega). + assert (0 <= fe_ofs_arg) by (unfold fe_ofs_arg; destruct Archi.win64; lia). + assert (0 <= 4 * b.(bound_outgoing)) by lia. + assert (fe_ofs_arg + 4 * b.(bound_outgoing) <= olink) by (apply align_le; lia). + assert (olink + w <= ocs) by (unfold ocs; lia). assert (ocs <= size_callee_save_area b ocs) by (apply size_callee_save_area_incr). - assert (size_callee_save_area b ocs <= ol) by (apply align_le; omega). - assert (ol + 4 * b.(bound_local) <= ostkdata) by (apply align_le; omega). - assert (ostkdata + bound_stack_data b <= oretaddr) by (apply align_le; omega). + assert (size_callee_save_area b ocs <= ol) by (apply align_le; lia). + assert (ol + 4 * b.(bound_local) <= ostkdata) by (apply align_le; lia). + assert (ostkdata + bound_stack_data b <= oretaddr) by (apply align_le; lia). (* Reorder as: outgoing back link @@ -90,13 +90,13 @@ Local Opaque Z.add Z.mul sepconj range. rewrite sep_swap45. rewrite sep_swap34. (* Apply range_split and range_split2 repeatedly *) - apply range_drop_left with 0. omega. - apply range_split_2. fold olink. omega. omega. - apply range_split. omega. - apply range_split_2. fold ol. omega. omega. - apply range_drop_right with ostkdata. omega. + apply range_drop_left with 0. lia. + apply range_split_2. fold olink. lia. lia. + apply range_split. lia. + apply range_split_2. fold ol. lia. lia. + apply range_drop_right with ostkdata. lia. rewrite sep_swap. - apply range_drop_left with (ostkdata + bound_stack_data b). omega. + apply range_drop_left with (ostkdata + bound_stack_data b). lia. rewrite sep_swap. exact H. Qed. @@ -113,17 +113,17 @@ Proof. set (ol := align (size_callee_save_area b ocs) 8). set (ostkdata := align (ol + 4 * b.(bound_local)) 8). set (oretaddr := align (ostkdata + b.(bound_stack_data)) w). - assert (0 < w) by (unfold w; destruct Archi.ptr64; omega). + assert (0 < w) by (unfold w; destruct Archi.ptr64; lia). generalize b.(bound_local_pos) b.(bound_outgoing_pos) b.(bound_stack_data_pos); intros. - assert (0 <= fe_ofs_arg) by (unfold fe_ofs_arg; destruct Archi.win64; omega). - assert (0 <= 4 * b.(bound_outgoing)) by omega. - assert (fe_ofs_arg + 4 * b.(bound_outgoing) <= olink) by (apply align_le; omega). - assert (olink + w <= ocs) by (unfold ocs; omega). + assert (0 <= fe_ofs_arg) by (unfold fe_ofs_arg; destruct Archi.win64; lia). + assert (0 <= 4 * b.(bound_outgoing)) by lia. + assert (fe_ofs_arg + 4 * b.(bound_outgoing) <= olink) by (apply align_le; lia). + assert (olink + w <= ocs) by (unfold ocs; lia). assert (ocs <= size_callee_save_area b ocs) by (apply size_callee_save_area_incr). - assert (size_callee_save_area b ocs <= ol) by (apply align_le; omega). - assert (ol + 4 * b.(bound_local) <= ostkdata) by (apply align_le; omega). - assert (ostkdata + bound_stack_data b <= oretaddr) by (apply align_le; omega). - split. omega. omega. + assert (size_callee_save_area b ocs <= ol) by (apply align_le; lia). + assert (ol + 4 * b.(bound_local) <= ostkdata) by (apply align_le; lia). + assert (ostkdata + bound_stack_data b <= oretaddr) by (apply align_le; lia). + split. lia. lia. Qed. Lemma frame_env_aligned: @@ -142,11 +142,11 @@ Proof. set (ol := align (size_callee_save_area b ocs) 8). set (ostkdata := align (ol + 4 * b.(bound_local)) 8). set (oretaddr := align (ostkdata + b.(bound_stack_data)) w). - assert (0 < w) by (unfold w; destruct Archi.ptr64; omega). + assert (0 < w) by (unfold w; destruct Archi.ptr64; lia). replace (align_chunk Mptr) with w by (rewrite align_chunk_Mptr; auto). split. exists (fe_ofs_arg / 8). unfold fe_ofs_arg; destruct Archi.win64; reflexivity. - split. apply align_divides; omega. - split. apply align_divides; omega. - split. apply align_divides; omega. - apply align_divides; omega. + split. apply align_divides; lia. + split. apply align_divides; lia. + split. apply align_divides; lia. + apply align_divides; lia. Qed. diff --git a/x86/TargetPrinter.ml b/x86/TargetPrinter.ml index 52955dcb..2000f96a 100644 --- a/x86/TargetPrinter.ml +++ b/x86/TargetPrinter.ml @@ -136,9 +136,9 @@ module ELF_System : SYSTEM = | Section_data(i, true) -> failwith "_Thread_local unsupported on this platform" | Section_data(i, false) | Section_small_data i -> - if i then ".data" else common_section () + variable_section ~sec:".data" ~bss:".bss" i | Section_const i | Section_small_const i -> - if i || (not !Clflags.option_fcommon) then ".section .rodata" else "COMM" + variable_section ~sec:".section .rodata" i | Section_string -> ".section .rodata" | Section_literal -> ".section .rodata.cst8,\"aM\",@progbits,8" | Section_jumptable -> ".text" @@ -233,11 +233,11 @@ module MacOS_System : SYSTEM = | Section_data(i, true) -> failwith "_Thread_local unsupported on this platform" | Section_data(i, false) | Section_small_data i -> - if i || (not !Clflags.option_fcommon) then ".data" else "COMM" + variable_section ~sec:".data" i | Section_const i | Section_small_const i -> - if i || (not !Clflags.option_fcommon) then ".const" else "COMM" + variable_section ~sec:".const" ~reloc:".const_data" i | Section_string -> ".const" - | Section_literal -> ".literal8" + | Section_literal -> ".const" | Section_jumptable -> ".text" | Section_user(s, wr, ex) -> sprintf ".section \"%s\", %s, %s" @@ -297,9 +297,9 @@ module Cygwin_System : SYSTEM = | Section_data(i, true) -> failwith "_Thread_local unsupported on this platform" | Section_data(i, false) | Section_small_data i -> - if i then ".data" else common_section () + variable_section ~sec:".data" ~bss:".bss" i | Section_const i | Section_small_const i -> - if i || (not !Clflags.option_fcommon) then ".section .rdata,\"dr\"" else "COMM" + variable_section ~sec:".section .rdata,\"dr\"" i | Section_string -> ".section .rdata,\"dr\"" | Section_literal -> ".section .rdata,\"dr\"" | Section_jumptable -> ".text" @@ -796,7 +796,7 @@ module Target(System: SYSTEM):TARGET = | Pret -> if (not Archi.ptr64) && (!current_function_sig).sig_cc.cc_structret then begin - fprintf oc " movl 0(%%esp), %%eax\n"; + fprintf oc " movl 4(%%esp), %%eax\n"; fprintf oc " ret $4\n" end else begin fprintf oc " ret\n" @@ -979,8 +979,7 @@ module Target(System: SYSTEM):TARGET = let print_epilogue oc = if !need_masks then begin - section oc (Section_const true); - (* not Section_literal because not 8-bytes *) + section oc Section_literal; print_align oc 16; fprintf oc "%a: .quad 0x8000000000000000, 0\n" raw_symbol "__negd_mask"; @@ -1010,7 +1009,7 @@ end let sel_target () = let module S = (val (match Configuration.system with | "linux" | "bsd" -> (module ELF_System:SYSTEM) - | "macosx" -> (module MacOS_System:SYSTEM) + | "macos" -> (module MacOS_System:SYSTEM) | "cygwin" -> (module Cygwin_System:SYSTEM) | _ -> invalid_arg ("System " ^ Configuration.system ^ " not supported") ):SYSTEM) in (module Target(S):TARGET) diff --git a/x86/extractionMachdep.v b/x86/extractionMachdep.v index 20c6a521..614ec589 100644 --- a/x86/extractionMachdep.v +++ b/x86/extractionMachdep.v @@ -28,6 +28,6 @@ Extract Constant Archi.win64 => Extract Constant SelectOp.symbol_is_external => "match Configuration.system with - | ""macosx"" -> C2C.atom_is_extern + | ""macos"" -> C2C.atom_is_extern | ""cygwin"" when Archi.ptr64 -> C2C.atom_is_extern | _ -> (fun _ -> false)". |