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* Handle assigned(x) expressions entirely in first pass by converting them to "x<>nil", indicate that procedure variables should not be called by setting nf_load_procvar flag (which is already used with typeconvnode for exactly the same purpose). This allows to generate better code when assigned(x) is used on right side of assigments. Mantis #24572.

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git-svn-id: trunk@25499 -
This commit is contained in:
sergei 2013-09-16 14:38:38 +00:00
parent 4ea89d01ea
commit dac8cbcefc
4 changed files with 18 additions and 12 deletions
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12
compiler/nadd.pas
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@ -1017,9 +1017,15 @@ implementation
if codegenerror then
exit;
{ tp procvar support }
maybe_call_procvar(left,true);
maybe_call_procvar(right,true);
{ tp procvar support. Omit for converted assigned() nodes }
if not (nf_load_procvar in flags) then
begin
maybe_call_procvar(left,true);
maybe_call_procvar(right,true);
end
else
if not (nodetype in [equaln,unequaln]) then
InternalError(2013091601);
{ convert array constructors to sets, because there is no other operator
possible for array constructors }

5
compiler/ncginl.pas
View File

@ -579,10 +579,7 @@ implementation
procedure tcginlinenode.second_assigned;
begin
secondpass(tcallparanode(left).left);
hlcg.a_cmp_const_loc_label(current_asmdata.CurrAsmList,left.resultdef,OC_NE,0,tcallparanode(left).left.location,current_procinfo.CurrTrueLabel);
hlcg.a_jmp_always(current_asmdata.CurrAsmList,current_procinfo.CurrFalseLabel);
location_reset(location,LOC_JUMP,OS_NO);
internalerror(2013091602);
end;
procedure Tcginlinenode.second_get_frame;

12
compiler/ninl.pas
View File

@ -2783,9 +2783,8 @@ implementation
tcallparanode(left).get_paratype;
end;
{ converting to an add node is tricky because of differences
in procvar handling between FPC and Delphi handling, so
handle specially }
{ Postpone conversion into addnode until firstpass, so targets
may override first_assigned and insert specific code. }
set_varstate(tcallparanode(left).left,vs_read,[vsf_must_be_valid]);
resultdef:=pasbool8type;
end;
@ -3983,10 +3982,13 @@ implementation
end;
end;
function tinlinenode.first_assigned: tnode;
begin
result:=nil;
expectloc := LOC_JUMP;
{ Comparison must not call procvars, indicate that with nf_load_procvar flag }
result:=caddnode.create(unequaln,tcallparanode(left).left,cnilnode.create);
include(result.flags,nf_load_procvar);
tcallparanode(left).left:=nil;
end;

1
compiler/node.pas
View File

@ -251,6 +251,7 @@ interface
{ ttypeconvnode, and the first one also treal/ord/pointerconstn }
{ second one also for subtractions of u32-u32 implicitly upcasted to s64 }
{ last one also used on addnode to inhibit procvar calling }
nf_explicit,
nf_internal, { no warnings/hints generated }
nf_load_procvar,