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* converted threadvar loading to high level code generator and updated/added

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git-svn-id: trunk@31644 -
This commit is contained in:
Jonas Maebe 2015-09-12 23:33:10 +00:00
parent 83ae160057
commit 19882aea7e
1 changed files with 43 additions and 24 deletions
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67
compiler/ncgld.pas
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@ -255,12 +255,19 @@ implementation
procedure tcgloadnode.generate_threadvar_access(gvs: tstaticvarsym);
var
respara,
paraloc1 : tcgpara;
fieldptrdef,
pvd : tdef;
endrelocatelab,
norelocatelab : tasmlabel;
tvref,
href : treference;
hregister : tregister;
tv_rec : trecorddef;
tv_index_field,
tv_non_mt_data_field: tsym;
tmpresloc: tlocation;
begin
if (tf_section_threadvars in target_info.flags) then
begin
@ -279,51 +286,63 @@ implementation
a relocate function is available. When the function
is available it is called to retrieve the address.
Otherwise the address is loaded with the symbol
The code needs to be in the order to first handle the
call and then the address load to be sure that the
register that is used for returning is the same (PFV)
}
tv_rec:=get_threadvar_record(resultdef,tv_index_field,tv_non_mt_data_field);
fieldptrdef:=cpointerdef.getreusable(resultdef);
current_asmdata.getjumplabel(norelocatelab);
current_asmdata.getjumplabel(endrelocatelab);
{ make sure hregister can't allocate the register necessary for the parameter }
pvd:=search_system_type('TRELOCATETHREADVARHANDLER').typedef;
if pvd.typ<>procvardef then
internalerror(2012120901);
{ FPC_THREADVAR_RELOCATE is nil? }
paraloc1.init;
paramanager.getintparaloc(current_asmdata.CurrAsmList,tprocvardef(pvd),1,paraloc1);
hregister:=hlcg.getaddressregister(current_asmdata.CurrAsmList,pvd);
reference_reset_symbol(href,current_asmdata.RefAsmSymbol('FPC_THREADVAR_RELOCATE'),0,pvd.size);
hlcg.a_load_ref_reg(current_asmdata.CurrAsmList,pvd,pvd,href,hregister);
hlcg.a_cmp_const_reg_label(current_asmdata.CurrAsmList,pvd,OC_EQ,0,hregister,norelocatelab);
{ don't save the allocated register else the result will be destroyed later }
{ no, call it with the index of the threadvar as parameter }
if not(vo_is_weak_external in gvs.varoptions) then
reference_reset_symbol(href,current_asmdata.RefAsmSymbol(gvs.mangledname),0,sizeof(pint))
reference_reset_symbol(tvref,current_asmdata.RefAsmSymbol(gvs.mangledname),0,sizeof(pint))
else
reference_reset_symbol(href,current_asmdata.WeakRefAsmSymbol(gvs.mangledname),0,sizeof(pint));
cg.a_load_ref_cgpara(current_asmdata.CurrAsmList,OS_32,href,paraloc1);
reference_reset_symbol(tvref,current_asmdata.WeakRefAsmSymbol(gvs.mangledname),0,sizeof(pint));
href:=tvref;
hlcg.g_set_addr_nonbitpacked_record_field_ref(current_asmdata.CurrAsmList,
tv_rec,
tfieldvarsym(tv_index_field),href);
hlcg.a_load_ref_cgpara(current_asmdata.CurrAsmList,tfieldvarsym(tv_index_field).vardef,href,paraloc1);
paramanager.freecgpara(current_asmdata.CurrAsmList,paraloc1);
paraloc1.done;
cg.allocallcpuregisters(current_asmdata.CurrAsmList);
cg.a_call_reg(current_asmdata.CurrAsmList,hregister);
{ result is the address of the threadvar }
respara:=hlcg.a_call_reg(current_asmdata.CurrAsmList,tprocvardef(pvd),hregister,[@paraloc1]);
paraloc1.done;
cg.deallocallcpuregisters(current_asmdata.CurrAsmList);
cg.getcpuregister(current_asmdata.CurrAsmList,NR_FUNCTION_RESULT_REG);
cg.ungetcpuregister(current_asmdata.CurrAsmList,NR_FUNCTION_RESULT_REG);
hregister:=hlcg.getaddressregister(current_asmdata.CurrAsmList,voidpointertype);
cg.a_load_reg_reg(current_asmdata.CurrAsmList,OS_INT,OS_ADDR,NR_FUNCTION_RESULT_REG,hregister);
cg.a_jmp_always(current_asmdata.CurrAsmList,endrelocatelab);
cg.a_label(current_asmdata.CurrAsmList,norelocatelab);
{ load the address of the result in hregister }
hregister:=hlcg.getaddressregister(current_asmdata.CurrAsmList,fieldptrdef);
location_reset(tmpresloc,LOC_REGISTER,OS_ADDR);
tmpresloc.register:=hregister;
hlcg.gen_load_cgpara_loc(current_asmdata.CurrAsmList,fieldptrdef,respara,tmpresloc,true);
respara.resetiftemp;
hlcg.a_jmp_always(current_asmdata.CurrAsmList,endrelocatelab);
{ no relocation needed, load the address of the variable only, the
layout of a threadvar is (4 bytes pointer):
layout of a threadvar is:
0 - Threadvar index
sizeof(pint) - Threadvar value in single threading }
if not(vo_is_weak_external in gvs.varoptions) then
reference_reset_symbol(href,current_asmdata.RefAsmSymbol(gvs.mangledname),sizeof(pint),sizeof(pint))
else
reference_reset_symbol(href,current_asmdata.WeakRefAsmSymbol(gvs.mangledname),sizeof(pint),sizeof(pint));
hlcg.a_loadaddr_ref_reg(current_asmdata.CurrAsmList,resultdef,voidpointertype,href,hregister);
cg.a_label(current_asmdata.CurrAsmList,endrelocatelab);
hlcg.reference_reset_base(location.reference,voidpointertype,hregister,0,location.reference.alignment);
hlcg.a_label(current_asmdata.CurrAsmList,norelocatelab);
href:=tvref;
hlcg.g_set_addr_nonbitpacked_record_field_ref(current_asmdata.CurrAsmList,
tv_rec,
tfieldvarsym(tv_non_mt_data_field),href);
{ load in the same "hregister" as above, so after this sequence
the address of the threadvar is always in hregister }
hlcg.a_loadaddr_ref_reg(current_asmdata.CurrAsmList,resultdef,fieldptrdef,href,hregister);
hlcg.a_label(current_asmdata.CurrAsmList,endrelocatelab);
hlcg.reference_reset_base(location.reference,fieldptrdef,hregister,0,location.reference.alignment);
end;
end;