* support marking defs created via the getreusable*() class methods as

"don't free even if not registered"; use for defs that may not be written
    to a ppu file, but that must nevertheless survive the compilation of the
    current module
  * mark all defs created for para locations as "don't free even if not
    registered", because we don't discard and recalculate all para locations
    after a module has been compiled (since that's not needed)
   o solves issues if the paralocations for a routine in the interface of
     unit A are calculated while the implementation of unit B gets
     compiled, and a new reusable type is allocated at that point which
     is not used anywhere else (after r32160)

git-svn-id: trunk@32235 -

compiler/aarch64/cpupara.pas

@@ -318,7 +318,7 @@ unit cpupara;
                 hp.paraloc[side].size:=OS_ADDR;
                 hp.paraloc[side].alignment:=voidpointertype.alignment;
                 hp.paraloc[side].intsize:=voidpointertype.size;
-                hp.paraloc[side].def:=cpointerdef.getreusable(hp.vardef);
+                hp.paraloc[side].def:=cpointerdef.getreusable_no_free(hp.vardef);
                 with hp.paraloc[side].add_location^ do
                   begin
                     size:=OS_ADDR;
@@ -397,7 +397,7 @@ unit cpupara;
 
         if push_addr_param(varspez,paradef,p.proccalloption) then
           begin
-            paradef:=cpointerdef.getreusable(paradef);
+            paradef:=cpointerdef.getreusable_no_free(paradef);
             loc:=LOC_REGISTER;
             paracgsize:=OS_ADDR;
             paralen:=tcgsize2size[OS_ADDR];

compiler/arm/cpupara.pas

@@ -92,7 +92,7 @@ unit cpupara;
         psym:=tparavarsym(pd.paras[nr-1]);
         pdef:=psym.vardef;
         if push_addr_param(psym.varspez,pdef,pd.proccalloption) then
-          pdef:=cpointerdef.getreusable(pdef);
+          pdef:=cpointerdef.getreusable_no_free(pdef);
         cgpara.reset;
         cgpara.size:=def_cgsize(pdef);
         cgpara.intsize:=tcgsize2size[cgpara.size];
@@ -378,7 +378,7 @@ unit cpupara;
 
             if push_addr_param(hp.varspez,paradef,p.proccalloption) then
               begin
-                paradef:=cpointerdef.getreusable(paradef);
+                paradef:=cpointerdef.getreusable_no_free(paradef);
                 loc:=LOC_REGISTER;
                 paracgsize := OS_ADDR;
                 paralen := tcgsize2size[OS_ADDR];
@@ -472,7 +472,7 @@ unit cpupara;
                             { LOC_REFERENCE always contains everything that's left }
                             paraloc^.loc:=LOC_REFERENCE;
                             paraloc^.size:=int_cgsize(paralen);
-                            paraloc^.def:=carraydef.getreusable(u8inttype,paralen);
+                            paraloc^.def:=carraydef.getreusable_no_free(u8inttype,paralen);
                             if (side=callerside) then
                               paraloc^.reference.index:=NR_STACK_POINTER_REG;
                             paraloc^.reference.offset:=stack_offset;
@@ -546,7 +546,7 @@ unit cpupara;
                             { LOC_REFERENCE always contains everything that's left }
                             paraloc^.loc:=LOC_REFERENCE;
                             paraloc^.size:=int_cgsize(paralen);
-                            paraloc^.def:=carraydef.getreusable(u8inttype,paralen);
+                            paraloc^.def:=carraydef.getreusable_no_free(u8inttype,paralen);
                             if (side=callerside) then
                               paraloc^.reference.index:=NR_STACK_POINTER_REG;
                             paraloc^.reference.offset:=stack_offset;
@@ -559,7 +559,7 @@ unit cpupara;
                         if push_addr_param(hp.varspez,paradef,p.proccalloption) then
                           begin
                             paraloc^.size:=OS_ADDR;
-                            paraloc^.def:=cpointerdef.getreusable(paradef);
+                            paraloc^.def:=cpointerdef.getreusable_no_free(paradef);
                             assignintreg
                           end
                         else

compiler/avr/cpupara.pas

@@ -255,7 +255,7 @@ unit cpupara;
 
             if push_addr_param(hp.varspez,paradef,p.proccalloption) then
               begin
-                paradef:=cpointerdef.getreusable(paradef);
+                paradef:=cpointerdef.getreusable_no_free(paradef);
                 loc:=LOC_REGISTER;
                 paracgsize:=OS_ADDR;
                 paralen:=tcgsize2size[OS_ADDR];
@@ -353,7 +353,7 @@ unit cpupara;
                         if push_addr_param(hp.varspez,paradef,p.proccalloption) then
                           begin
                             paraloc^.size:=OS_ADDR;
-                            paraloc^.def:=cpointerdef.getreusable(paradef);
+                            paraloc^.def:=cpointerdef.getreusable_no_free(paradef);
                             assignintreg
                           end
                         else

compiler/i386/cpupara.pas

@@ -422,7 +422,7 @@ unit cpupara;
               begin
                 paralen:=sizeof(aint);
                 paracgsize:=OS_ADDR;
-                paradef:=cpointerdef.getreusable(paradef);
+                paradef:=cpointerdef.getreusable_no_free(paradef);
               end
             else
               begin
@@ -574,7 +574,7 @@ unit cpupara;
                       begin
                         paralen:=sizeof(aint);
                         paracgsize:=OS_ADDR;
-                        paradef:=cpointerdef.getreusable(paradef);
+                        paradef:=cpointerdef.getreusable_no_free(paradef);
                       end
                     else
                       begin

compiler/i8086/cpupara.pas

@@ -236,7 +236,7 @@ unit cpupara;
         psym:=tparavarsym(pd.paras[nr-1]);
         pdef:=psym.vardef;
         if push_addr_param(psym.varspez,pdef,pd.proccalloption) then
-          pdef:=cpointerdef.getreusable(pdef);
+          pdef:=cpointerdef.getreusable_no_free(pdef);
         cgpara.reset;
         cgpara.size:=def_cgsize(pdef);
         cgpara.intsize:=tcgsize2size[cgpara.size];
@@ -442,7 +442,7 @@ unit cpupara;
               begin
                 paralen:=voidpointertype.size;
                 paracgsize:=int_cgsize(voidpointertype.size);
-                paradef:=cpointerdef.getreusable(paradef);
+                paradef:=cpointerdef.getreusable_no_free(paradef);
               end
             else
               begin
@@ -602,7 +602,7 @@ unit cpupara;
                       begin
                         paralen:=voidpointertype.size;
                         paracgsize:=int_cgsize(voidpointertype.size);
-                        paradef:=cpointerdef.getreusable(paradef);
+                        paradef:=cpointerdef.getreusable_no_free(paradef);
                       end
                     else
                       begin

compiler/jvm/cpupara.pas

@@ -160,7 +160,7 @@ implementation
         else if jvmimplicitpointertype(result.def) then
           begin
             retcgsize:=OS_ADDR;
-            result.def:=cpointerdef.getreusable(result.def);
+            result.def:=cpointerdef.getreusable_no_free(result.def);
           end
         else
           begin
@@ -237,7 +237,7 @@ implementation
             else if jvmimplicitpointertype(hp.vardef) then
               begin
                 paracgsize:=OS_ADDR;
-                paradef:=cpointerdef.getreusable(hp.vardef);
+                paradef:=cpointerdef.getreusable_no_free(hp.vardef);
               end
             else
               begin

compiler/llvm/llvmpara.pas

@@ -140,7 +140,7 @@ unit llvmpara;
                 a pointer to the value that it should place on the stack (or
                 passed in registers, in some cases) }
               paraloc^.llvmvalueloc:=false;
-              paraloc^.def:=cpointerdef.getreusable(paraloc^.def);
+              paraloc^.def:=cpointerdef.getreusable_no_free(paraloc^.def);
               paraloc^.size:=def_cgsize(paraloc^.def);
               paraloc^.loc:=LOC_REGISTER;
               paraloc^.register:=hlcg.getaddressregister(list,paraloc^.def);

compiler/m68k/cpupara.pas

@@ -275,7 +275,7 @@ unit cpupara;
 
             if push_addr_param(hp.varspez,paradef,p.proccalloption) then
               begin
-                paradef:=cpointerdef.getreusable(paradef);
+                paradef:=cpointerdef.getreusable_no_free(paradef);
                 paracgsize := OS_ADDR;
                 paralen := tcgsize2size[OS_ADDR];
               end

compiler/mips/cpupara.pas

@@ -273,7 +273,7 @@ implementation
               begin
                 paracgsize := OS_ADDR;
                 paralen := tcgsize2size[paracgsize];
-                paradef := cpointerdef.getreusable(paradef);
+                paradef := cpointerdef.getreusable_no_free(paradef);
               end
             else
               begin

compiler/paramgr.pas

@@ -560,7 +560,7 @@ implementation
             retloc.def:=tdef(p.owner.defowner);
             if not (is_implicit_pointer_object_type(retloc.def) or
                (retloc.def.typ<>objectdef)) then
-              retloc.def:=cpointerdef.getreusable(retloc.def);
+              retloc.def:=cpointerdef.getreusable_no_free(retloc.def);
           end;
         retcgsize:=def_cgsize(retloc.def);
         retloc.intsize:=retloc.def.size;
@@ -568,7 +568,7 @@ implementation
         { Return is passed as var parameter }
         if ret_in_param(retloc.def,p) then
           begin
-            retloc.def:=cpointerdef.getreusable(retloc.def);
+            retloc.def:=cpointerdef.getreusable_no_free(retloc.def);
             paraloc:=retloc.add_location;
             paraloc^.loc:=LOC_REFERENCE;
             paraloc^.size:=retcgsize;
@@ -621,7 +621,7 @@ implementation
         else if restlen in [1,2,4,8] then
           result:=cgsize_orddef(int_cgsize(restlen))
         else
-          result:=carraydef.getreusable(u8inttype,restlen);
+          result:=carraydef.getreusable_no_free(u8inttype,restlen);
       end;
 
 

compiler/pmodules.pas

@@ -568,7 +568,8 @@ implementation
           begin
             def:=tdef(current_module.localsymtable.deflist[i]);
             { this also frees def, as the defs are owned by the symtable }
-            if not def.is_registered then
+            if not def.is_registered and
+               not(df_not_registered_no_free in def.defoptions) then
               current_module.localsymtable.deletedef(def);
           end;
       end;

compiler/powerpc/cpupara.pas

@@ -87,7 +87,7 @@ unit cpupara;
         psym:=tparavarsym(pd.paras[nr-1]);
         pdef:=psym.vardef;
         if push_addr_param(psym.varspez,pdef,pd.proccalloption) then
-          pdef:=cpointerdef.getreusable(pdef);
+          pdef:=cpointerdef.getreusable_no_free(pdef);
         cgpara.reset;
         cgpara.size:=def_cgsize(pdef);
         cgpara.intsize:=tcgsize2size[cgpara.size];
@@ -389,7 +389,7 @@ unit cpupara;
 
               if push_addr_param(hp.varspez,paradef,p.proccalloption) then
                 begin
-                  paradef:=cpointerdef.getreusable(paradef);
+                  paradef:=cpointerdef.getreusable_no_free(paradef);
                   loc:=LOC_REGISTER;
                   paracgsize := OS_ADDR;
                   paralen := tcgsize2size[OS_ADDR];
@@ -570,7 +570,7 @@ unit cpupara;
                              if paraloc^.size<>OS_NO then
                                paraloc^.def:=cgsize_orddef(paraloc^.size)
                              else
-                               paraloc^.def:=carraydef.getreusable(u8inttype,paralen);
+                               paraloc^.def:=carraydef.getreusable_no_free(u8inttype,paralen);
                            end;
                          else
                            internalerror(2006011101);

compiler/powerpc64/cpupara.pas

@@ -88,7 +88,7 @@ begin
   psym:=tparavarsym(pd.paras[nr-1]);
   pdef:=psym.vardef;
   if push_addr_param(psym.varspez,pdef,pd.proccalloption) then
-    pdef:=cpointerdef.getreusable(pdef);
+    pdef:=cpointerdef.getreusable_no_free(pdef);
   cgpara.reset;
   cgpara.size := def_cgsize(pdef);
   cgpara.intsize := tcgsize2size[cgpara.size];
@@ -418,7 +418,7 @@ begin
     next 8 byte boundary? }
   paraaligned:=false;
   if push_addr_param(varspez, paradef, p.proccalloption) then begin
-    paradef := cpointerdef.getreusable(paradef);
+    paradef := cpointerdef.getreusable_no_free(paradef);
     loc := LOC_REGISTER;
     paracgsize := OS_ADDR;
     paralen := tcgsize2size[OS_ADDR];

compiler/sparc/cpupara.pas

@@ -196,7 +196,7 @@ implementation
             if push_addr_param(hp.varspez,paradef,p.proccalloption) then
               begin
                 paracgsize:=OS_ADDR;
-                paradef:=cpointerdef.getreusable(paradef);
+                paradef:=cpointerdef.getreusable_no_free(paradef);
               end
             else
               begin

compiler/symconst.pas

@@ -212,7 +212,13 @@ type
     { def has been copied from another def so symtable is not owned }
     df_copied_def,
     { def was created as a generic constraint and thus is only "shallow" }
-    df_genconstraint
+    df_genconstraint,
+    { don't free def after finishing the implementation section even if it
+      wasn't written to the ppu, as this def may still be referred (e.g. because
+      it was used to set the type of a paraloc, since paralocs are reused
+      across units) -- never stored to ppu, because in that case the def would
+      be registered }
+    df_not_registered_no_free
   );
   tdefoptions=set of tdefoption;
 

compiler/symdef.pas

@@ -225,6 +225,11 @@ interface
           { returns a pointerdef for def, reusing an existing one in case it
             exists in the current module }
           class function getreusable(def: tdef): tpointerdef; virtual;
+          { same as above, but in case the def must never be freed after the
+            current module has been compiled -- even if the def was not written
+            to the ppu file (for defs in para locations, as we don't reset them
+            so we don't have to recalculate them all the time) }
+          class function getreusable_no_free(def: tdef): tpointerdef;
           function size:asizeint;override;
           function getcopy:tstoreddef;override;
           constructor ppuload(ppufile:tcompilerppufile);
@@ -496,6 +501,11 @@ interface
           constructor create_from_pointer(def:tpointerdef);virtual;
           constructor create(l,h:asizeint;def:tdef);virtual;
           class function getreusable(def: tdef; elems: asizeint): tarraydef; virtual;
+          { same as above, but in case the def must never be freed after the
+            current module has been compiled -- even if the def was not written
+            to the ppu file (for defs in para locations, as we don't reset them
+            so we don't have to recalculate them all the time) }
+          class function getreusable_no_free(def: tdef; elems: asizeint): tarraydef;
           constructor ppuload(ppufile:tcompilerppufile);
           destructor destroy; override;
           function getcopy : tstoreddef;override;
@@ -616,6 +626,11 @@ interface
           constructor create(level:byte);virtual;
           { returns a procvardef that represents the address of a proc(var)def }
           class function getreusableprocaddr(def: tabstractprocdef): tprocvardef; virtual;
+          { same as above, but in case the def must never be freed after the
+            current module has been compiled -- even if the def was not written
+            to the ppu file (for defs in para locations, as we don't reset them
+            so we don't have to recalculate them all the time) }
+          class function getreusableprocaddr_no_free(def: tabstractprocdef): tprocvardef;
           constructor ppuload(ppufile:tcompilerppufile);
           function getcopy : tstoreddef;override;
           { do not override this routine in platform-specific subclasses,
@@ -2154,6 +2169,7 @@ implementation
        { Register in current_module }
        if assigned(current_module) then
          begin
+           exclude(defoptions,df_not_registered_no_free);
            if defid<defid_not_registered then
              defid:=deflist_index
            else
@@ -3224,6 +3240,14 @@ implementation
       end;
 
 
+    class function tpointerdef.getreusable_no_free(def: tdef): tpointerdef;
+      begin
+        result:=getreusable(def);
+        if not result.is_registered then
+          include(result.defoptions,df_not_registered_no_free);
+      end;
+
+
     function tpointerdef.size: asizeint;
       begin
         result:=sizeof(pint);
@@ -3540,6 +3564,13 @@ implementation
         result:=tarraydef(res^.Data);
       end;
 
+    class function tarraydef.getreusable_no_free(def: tdef; elems: asizeint): tarraydef;
+      begin
+        result:=getreusable(def,elems);
+        if not result.is_registered then
+          include(result.defoptions,df_not_registered_no_free);
+      end;
+
 
     destructor tarraydef.destroy;
       begin
@@ -6086,6 +6117,14 @@ implementation
       end;
 
 
+    class function tprocvardef.getreusableprocaddr_no_free(def: tabstractprocdef): tprocvardef;
+      begin
+        result:=getreusableprocaddr(def);
+        if not result.is_registered then
+          include(result.defoptions,df_not_registered_no_free);
+      end;
+
+
     constructor tprocvardef.ppuload(ppufile:tcompilerppufile);
       begin
          inherited ppuload(procvardef,ppufile);

compiler/utils/ppuutils/ppudump.pp

@@ -1420,7 +1420,9 @@ const
      (mask:df_generic;        str:'Generic'),
      (mask:df_specialization; str:'Specialization'),
      (mask:df_copied_def;     str:'Copied Typedef'),
-     (mask:df_genconstraint;  str:'Generic Constraint')
+     (mask:df_genconstraint;  str:'Generic Constraint'),
+     { this should never happen for defs stored to a ppu file }
+     (mask:df_not_registered_no_free;  str:'Unregistered/No free (invalid)')
   );
   defstate : array[1..ord(high(tdefstate))] of tdefstateinfo=(
      (mask:ds_vmt_written;           str:'VMT Written'),

compiler/x86_64/cpupara.pas

@@ -288,7 +288,7 @@ unit cpupara;
         else
           result:=class2;
         result.typ:=X86_64_SSE_CLASS;
-        result.def:=carraydef.getreusable(s32floattype,2)
+        result.def:=carraydef.getreusable_no_free(s32floattype,2)
       end;
 
 
@@ -401,7 +401,7 @@ unit cpupara;
                (classes[i-1].typ<>X86_64_SSEUP_CLASS) then
               begin
                 classes[i].typ:=X86_64_SSE_CLASS;
-                classes[i].def:=carraydef.getreusable(s32floattype,2);
+                classes[i].def:=carraydef.getreusable_no_free(s32floattype,2);
               end;
 
             (*  If X86_64_X87UP_CLASS isn't preceded by X86_64_X87_CLASS,
@@ -443,7 +443,7 @@ unit cpupara;
               X86_64_SSESF_CLASS:
                 begin
                   classes[0].typ:=X86_64_SSE_CLASS;
-                  classes[0].def:=carraydef.getreusable(s32floattype,2);
+                  classes[0].def:=carraydef.getreusable_no_free(s32floattype,2);
                 end;
             end;
           { 2) the second part is 32 bit, but the total size is > 12 bytes }
@@ -457,7 +457,7 @@ unit cpupara;
               X86_64_SSESF_CLASS:
                 begin
                   classes[1].typ:=X86_64_SSE_CLASS;
-                  classes[1].def:=carraydef.getreusable(s32floattype,2);
+                  classes[1].def:=carraydef.getreusable_no_free(s32floattype,2);
                 end;
             end;
 
@@ -613,7 +613,7 @@ unit cpupara;
                         { if we have e.g. a record with two successive "single"
                           fields, we need a 64 bit rather than a 32 bit load }
                         classes[0].typ:=X86_64_SSE_CLASS;
-                        classes[0].def:=carraydef.getreusable(s32floattype,2);
+                        classes[0].def:=carraydef.getreusable_no_free(s32floattype,2);
                       end;
                     result:=1;
                   end;
@@ -639,9 +639,9 @@ unit cpupara;
                 s128real:
                   begin
                     classes[0].typ:=X86_64_SSE_CLASS;
-                    classes[0].def:=carraydef.getreusable(s32floattype,2);
+                    classes[0].def:=carraydef.getreusable_no_free(s32floattype,2);
                     classes[1].typ:=X86_64_SSEUP_CLASS;
-                    classes[1].def:=carraydef.getreusable(s32floattype,2);
+                    classes[1].def:=carraydef.getreusable_no_free(s32floattype,2);
                     result:=2;
                   end;
                 else
@@ -1102,7 +1102,7 @@ unit cpupara;
                 loc[2].typ:=X86_64_NO_CLASS;
                 paracgsize:=OS_ADDR;
                 paralen:=sizeof(pint);
-                paradef:=cpointerdef.getreusable(paradef);
+                paradef:=cpointerdef.getreusable_no_free(paradef);
                 loc[1].def:=paradef;
               end
             else