paweld/fpc
1
0
Fork 0
mirror of https://gitlab.com/freepascal.org/fpc/source.git synced 2025-04-22 04:29:29 +02:00
Code Issues Packages Projects Releases Wiki Activity

* don't make copies of arrays passed as value parameters to cdecl routines

Browse Source 
(since C compilers don't copy such arrays either, as they're implciitly
     pointers)

git-svn-id: trunk@29871 -
This commit is contained in:
Jonas Maebe 2015-02-23 22:50:23 +00:00
parent c6ba0bb6fb
commit 6e12ad817f
4 changed files with 15 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
compiler/hlcgobj.pas
View File

@ -4692,8 +4692,10 @@ implementation
begin
list:=TAsmList(arg);
if (tsym(p).typ=paravarsym) and
(tparavarsym(p).varspez=vs_value) and
(paramanager.push_addr_param(tparavarsym(p).varspez,tparavarsym(p).vardef,current_procinfo.procdef.proccalloption)) then
((vo_has_local_copy in tparavarsym(p).varoptions) or
((is_open_array(tparavarsym(p).vardef) or
is_array_of_const(tparavarsym(p).vardef)) and
(tparavarsym(p).varspez=vs_value))) then
begin
{ we have no idea about the alignment at the caller side }
location_get_data_ref(list,tparavarsym(p).vardef,tparavarsym(p).initialloc,href,true,1);

2
compiler/ncal.pas
View File

@ -949,6 +949,8 @@ implementation
(parasym.varspez=vs_value)) or
(cpf_varargs_para in callparaflags)) and
(left.nodetype<>nothingn) and
(not(aktcallnode.procdefinition.proccalloption in cdecl_pocalls) or
(left.resultdef.typ<>arraydef)) and
paramanager.push_addr_param(vs_value,left.resultdef,
aktcallnode.procdefinition.proccalloption) then
copy_value_by_ref_para;

6
compiler/ncgutil.pas
View File

@ -610,8 +610,10 @@ implementation
begin
list:=TAsmList(arg);
if (tsym(p).typ=paravarsym) and
(tparavarsym(p).varspez=vs_value) and
(paramanager.push_addr_param(tparavarsym(p).varspez,tparavarsym(p).vardef,current_procinfo.procdef.proccalloption)) then
((vo_has_local_copy in tparavarsym(p).varoptions) or
((is_open_array(tparavarsym(p).vardef) or
is_array_of_const(tparavarsym(p).vardef)) and
(tparavarsym(p).varspez=vs_value))) then
begin
{ we have no idea about the alignment at the caller side }
hlcg.location_get_data_ref(list,tparavarsym(p).vardef,tparavarsym(p).initialloc,href,true,1);

7
compiler/pparautl.pas
View File

@ -331,12 +331,15 @@ implementation
{ We need a local copy for a value parameter when only the
address is pushed. Open arrays and Array of Const are
an exception because they are allocated at runtime and the
address that is pushed is patched }
address that is pushed is patched. Arrays passed to cdecl routines
also because arrays are treated like pointers in C. }
if (varspez=vs_value) and
paramanager.push_addr_param(varspez,vardef,pd.proccalloption) and
not(is_open_array(vardef) or
is_array_of_const(vardef)) and
not(target_info.system in systems_caller_copy_addr_value_para) then
not(target_info.system in systems_caller_copy_addr_value_para) and
(not(pd.proccalloption in cdecl_pocalls) or
(vardef.typ<>arraydef)) then
include(varoptions,vo_has_local_copy);
{ needs high parameter ? }