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author | xleroy <xleroy@fca1b0fc-160b-0410-b1d3-a4f43f01ea2e> | 2010-04-10 12:15:43 +0000 |
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committer | xleroy <xleroy@fca1b0fc-160b-0410-b1d3-a4f43f01ea2e> | 2010-04-10 12:15:43 +0000 |
commit | a32ed5df6aa31aa5a38a55af9d75880e906721f2 (patch) | |
tree | 737bf6863dde159547d11941fde0af70ffad3278 /powerpc | |
parent | bae0ed25d01388093ebcb4b32db0b6d1169f17db (diff) | |
download | compcert-a32ed5df6aa31aa5a38a55af9d75880e906721f2.tar.gz compcert-a32ed5df6aa31aa5a38a55af9d75880e906721f2.zip |
Coloring: allow to exclude user-specified registers from allocation.
CPragmas (PPC/EABI only): add #pragma reserve_register
git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1314 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
Diffstat (limited to 'powerpc')
-rw-r--r-- | powerpc/Machregsaux.ml | 45 | ||||
-rw-r--r-- | powerpc/Machregsaux.mli | 16 | ||||
-rw-r--r-- | powerpc/eabi/CPragmas.ml | 31 |
3 files changed, 89 insertions, 3 deletions
diff --git a/powerpc/Machregsaux.ml b/powerpc/Machregsaux.ml new file mode 100644 index 00000000..b729d100 --- /dev/null +++ b/powerpc/Machregsaux.ml @@ -0,0 +1,45 @@ +(* *********************************************************************) +(* *) +(* The Compcert verified compiler *) +(* *) +(* Xavier Leroy, INRIA Paris-Rocquencourt *) +(* *) +(* Copyright Institut National de Recherche en Informatique et en *) +(* Automatique. All rights reserved. This file is distributed *) +(* under the terms of the INRIA Non-Commercial License Agreement. *) +(* *) +(* *********************************************************************) + +(** Auxiliary functions on machine registers *) + +open Machregs + +let register_names = [ + ("R3", R3); ("R4", R4); ("R5", R5); ("R6", R6); + ("R7", R7); ("R8", R8); ("R9", R9); ("R10", R10); + ("R14", R14); ("R15", R15); ("R16", R16); + ("R17", R17); ("R18", R18); ("R19", R19); ("R20", R20); + ("R21", R21); ("R22", R22); ("R23", R23); ("R24", R24); + ("R25", R25); ("R26", R26); ("R27", R27); ("R28", R28); + ("R29", R29); ("R30", R30); ("R31", R31); + ("F1", F1); ("F2", F2); ("F3", F3); ("F4", F4); + ("F5", F5); ("F6", F6); ("F7", F7); ("F8", F8); + ("F9", F9); ("F10", F10); ("F14", F14); ("F15", F15); + ("F16", F16); ("F17", F17); ("F18", F18); ("F19", F19); + ("F20", F20); ("F21", F21); ("F22", F22); ("F23", F23); + ("F24", F24); ("F25", F25); ("F26", F26); ("F27", F27); + ("F28", F28); ("F29", F29); ("F30", F30); ("F31", F31); + ("R11", IT1); ("R0", IT2); + ("F11", FT1); ("F12", FT2); ("F0", FT3) +] + +let register_by_name s = + try + Some(List.assoc (String.uppercase s) register_names) + with Not_found -> + None + +let can_reserve_register r = + List.mem r Conventions.int_callee_save_regs + || List.mem r Conventions.float_callee_save_regs + diff --git a/powerpc/Machregsaux.mli b/powerpc/Machregsaux.mli new file mode 100644 index 00000000..6d819882 --- /dev/null +++ b/powerpc/Machregsaux.mli @@ -0,0 +1,16 @@ +(* *********************************************************************) +(* *) +(* The Compcert verified compiler *) +(* *) +(* Xavier Leroy, INRIA Paris-Rocquencourt *) +(* *) +(* Copyright Institut National de Recherche en Informatique et en *) +(* Automatique. All rights reserved. This file is distributed *) +(* under the terms of the INRIA Non-Commercial License Agreement. *) +(* *) +(* *********************************************************************) + +(** Auxiliary functions on machine registers *) + +val register_by_name: string -> Machregs.mreg option +val can_reserve_register: Machregs.mreg -> bool diff --git a/powerpc/eabi/CPragmas.ml b/powerpc/eabi/CPragmas.ml index 4bb7786e..3104cc88 100644 --- a/powerpc/eabi/CPragmas.ml +++ b/powerpc/eabi/CPragmas.ml @@ -68,6 +68,8 @@ let _ = sec_near_access = false} ] +(* #pragma section *) + let process_section_pragma classname istring ustring addrmode accmode = let old_si = try Hashtbl.find section_table classname @@ -85,6 +87,7 @@ let process_section_pragma classname istring ustring addrmode accmode = else (addrmode = "near-code") || (addrmode = "near-data") } in Hashtbl.add section_table classname si +(* #pragma use_section *) let use_section_table : (AST.ident, section_info) Hashtbl.t = Hashtbl.create 51 @@ -122,6 +125,19 @@ let define_variable id d = if is_small !Clflags.option_small_data then "SDATA" else "DATA" in default_use_section id sect +(* #pragma reserve_register *) + +let process_reserve_register_pragma name = + match Machregsaux.register_by_name name with + | None -> + C2Clight.error "unknown register in `reserve_register' pragma" + | Some r -> + if Machregsaux.can_reserve_register r then + Coloringaux.reserved_registers := + r :: !Coloringaux.reserved_registers + else + C2Clight.error "cannot reserve this register (not a callee-save)" + (* Parsing of pragmas using regexps *) let re_start_pragma_section = Str.regexp "section\\b" @@ -144,6 +160,11 @@ let re_pragma_use_section = Str.regexp let re_split_idents = Str.regexp "[ \t,]+" +let re_start_pragma_reserve_register = Str.regexp "reserve_register\\b" + +let re_pragma_reserve_register = Str.regexp + "reserve_register[ \t]+\\([A-Za-z0-9]+\\)" + let process_pragma name = if Str.string_match re_pragma_section name 0 then begin process_section_pragma @@ -162,9 +183,13 @@ let process_pragma name = if identlist = [] then C2Clight.warning "vacuous `use_section' pragma"; List.iter (process_use_section_pragma classname) identlist; true - end else if Str.string_match re_start_pragma_use_section name 0 then - (C2Clight.error "ill-formed `use_section' pragma"; true) - else + end else if Str.string_match re_start_pragma_use_section name 0 then begin + C2Clight.error "ill-formed `use_section' pragma"; true + end else if Str.string_match re_pragma_reserve_register name 0 then begin + process_reserve_register_pragma (Str.matched_group 1 name); true + end else if Str.string_match re_start_pragma_reserve_register name 0 then begin + C2Clight.error "ill-formed `reserve_register' pragma"; true + end else false let initialize () = |