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Improve bytecode generation.

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This commit is contained in:
James Roseborough
2010-08-10 05:52:33 +00:00
parent e3f32988d6
commit afa2d5fd09
3 changed files with 18 additions and 18 deletions
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8
src/jse/org/luaj/vm2/luajc/JavaGen.java
View File

@@ -317,6 +317,7 @@ public class JavaGen {
builder.dup();
builder.dup();
builder.storeLocal(pc, a);
// builder.createUpvalues(pc, a+3, 1);
builder.storeLocal(pc, a+3);
builder.loadLocal(pc, a+1); // limit
builder.loadLocal(pc, a+2); // step
@@ -418,13 +419,6 @@ public class JavaGen {
// let builder process branch instructions
builder.onEndOfLuaInstruction( pc0 );
// for-loops have upvalue created at top of loop
switch ( o ) {
case Lua.OP_FORPREP:
builder.convertToUpvalue(pc+1, a+3);
break;
}
}
}

16
src/jse/org/luaj/vm2/luajc/ProtoInfo.java
View File

@@ -244,11 +244,12 @@ public class ProtoInfo {
case Lua.OP_FORLOOP: /* A sBx R(A)+=R(A+2);
if R(A) <?= R(A+1) then { pc+=sBx; R(A+3)=R(A) }*/
a = Lua.GETARG_A( ins );
v[a][pc].isreferenced = true;
v[a+2][pc].isreferenced = true;
v[a][pc] = new VarInfo(a,pc);
v[a+3][pc] = new VarInfo(a+1,pc);
v[a][pc].isreferenced = true;
v[a+1][pc].isreferenced = true;
v[a+3][pc] = new VarInfo(a+3,pc);
break;
case Lua.OP_LOADNIL: /* A B R(A) := ... := R(B) := nil */
@@ -444,16 +445,9 @@ public class ProtoInfo {
}
public boolean isUpvalueRefer(int pc, int slot) {
// special case for opcodes where overlap between refer and assign
if ( pc >= 0 ) {
switch ( Lua.GET_OPCODE(prototype.code[pc]) ) {
case Lua.OP_CLOSURE:
case Lua.OP_CALL:
case Lua.OP_TFORLOOP:
pc -= 1;
break;
}
}
// special case when both refer and assign in same instruction
if ( pc >= 0 && vars[slot][pc] != null && vars[slot][pc].pc == pc )
pc -= 1;
VarInfo v = pc<0? params[slot]: vars[slot][pc];
// return v.upvalue != null && v.upvalue.rw;
return v != null && v.upvalue != null;