From d2a9308181e64e03d65fa69ad5b8773b02bb6ebb Mon Sep 17 00:00:00 2001
From: sergei <gorelkin@nanoreflex.ru>
Date: Fri, 3 Jan 2014 08:14:43 +0000
Subject: [PATCH] + SPARC: implemented register spill replacement.

git-svn-id: trunk@26364 -
---
 compiler/rgobj.pas       |  4 ++--
 compiler/sparc/rgcpu.pas | 50 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 52 insertions(+), 2 deletions(-)

diff --git a/compiler/rgobj.pas b/compiler/rgobj.pas
index 4921a0b2ea..14e83e3727 100644
--- a/compiler/rgobj.pas
+++ b/compiler/rgobj.pas
@@ -2134,7 +2134,7 @@ unit rgobj;
         if not spilled then
           exit;
 
-{$if defined(x86) or defined(mips)}
+{$if defined(x86) or defined(mips) or defined(sparc)}
         { Try replacing the register with the spilltemp. This is useful only
           for the i386,x86_64 that support memory locations for several instructions
 
@@ -2149,7 +2149,7 @@ unit rgobj;
                     mustbespilled:=false;
                 end;
             end;
-{$endif defined(x86) or defined(mips)}
+{$endif defined(x86) or defined(mips) or defined(sparc)}
 
         {
           There are registers that need are spilled. We generate the
diff --git a/compiler/sparc/rgcpu.pas b/compiler/sparc/rgcpu.pas
index 5297337ecf..fabbd3dd78 100644
--- a/compiler/sparc/rgcpu.pas
+++ b/compiler/sparc/rgcpu.pas
@@ -37,6 +37,7 @@ unit rgcpu;
         function get_spill_subreg(r : tregister) : tsubregister;override;
         procedure do_spill_read(list:TAsmList;pos:tai;const spilltemp:treference;tempreg:tregister);override;
         procedure do_spill_written(list:TAsmList;pos:tai;const spilltemp:treference;tempreg:tregister);override;
+        function do_spill_replace(list:TAsmList;instr:taicpu;orgreg:tsuperregister;const spilltemp:treference):boolean;override;
       end;
 
 
@@ -161,4 +162,53 @@ implementation
           inherited do_spill_written(list,pos,spilltemp,tempreg);
     end;
 
+
+    function trgcpu.do_spill_replace(list:TAsmList;instr:taicpu;orgreg:tsuperregister;const spilltemp:treference):boolean;
+      var
+        opidx: longint;
+      begin
+        result:=false;
+        { Replace 'mov  src,orgreg' with 'st  src,spilltemp'
+              and 'mov  orgreg,dst' with 'ld  spilltemp,dst' }
+        if (abs(spilltemp.offset)>4095) then
+          exit;
+        if ((regtype=R_INTREGISTER) and (instr.opcode<>A_MOV)) or
+           ((regtype=R_FPUREGISTER) and (instr.opcode<>A_FMOVs) and (instr.opcode<>A_FMOVd)) then
+          exit;
+        { Ignore mis-encoded stuff like 'mov %something,%y' }
+        if (instr.ops<>2) or
+           (instr.oper[0]^.typ<>top_reg) or
+           (instr.oper[1]^.typ<>top_reg) or
+           (getregtype(instr.oper[0]^.reg)<>regtype) or
+           (getregtype(instr.oper[1]^.reg)<>regtype) then
+          exit;
+        opidx:=-1;
+        if get_alias(getsupreg(instr.oper[0]^.reg))=orgreg then
+          begin
+            if (regtype=R_INTREGISTER) then
+              instr.opcode:=A_LD
+            else if (getsubreg(instr.oper[0]^.reg)=R_SUBFS) then
+              instr.opcode:=A_LDF
+            else
+              instr.opcode:=A_LDDF;
+            opidx:=0;
+          end
+        else if get_alias(getsupreg(instr.oper[1]^.reg))=orgreg then
+          begin
+            if (regtype=R_INTREGISTER) then
+              instr.opcode:=A_ST
+            else if (getsubreg(instr.oper[1]^.reg)=R_SUBFS) then
+              instr.opcode:=A_STF
+            else
+              instr.opcode:=A_STDF;
+            opidx:=1;
+          end
+        else
+          InternalError(2013061002);
+        instr.oper[opidx]^.typ:=top_ref;
+        new(instr.oper[opidx]^.ref);
+        instr.oper[opidx]^.ref^:=spilltemp;
+        result:=true;
+      end;
+
 end.