public void generate_code(CodeGeneratorState s) throws PlcException, IOException {
if (code == null) {
c.emitRet(); // empty function code
return;
}
// ------------------------------------------
// traverse tree to allocate automatic vars?
// ------------------------------------------
int n_auto_vars = svars.getUsedSlots();
int n_int_auto_vars = isvars.getUsedSlots();
// ------------------------------------------
// ------------------------------------------
// generate prologue code here
// ------------------------------------------
// check number of args
int n_args = args_def.size();
String good_args_label = c.getLabel();
c.emitIConst_32bit(n_args);
c.emitISubLU();
c.emitJz(good_args_label);
// wrong count - throw string
// BUG! Need less consuming way of reporting this. Maybe by
// calling class object Method? Or by summoning something?
c.emitString("arg count: " + name + " in " + s.get_class().getName());
c.emitThrow();
c.markLabel(good_args_label);
if (requestDebug) c.emitDebug((byte) 0x1, "Enabled debug");
// push nulls to reserve stack space for autovars
// BUG! We can execute vars initialization code here, can we?
// We can if code does not depend on auto vars itself, or depends only on
// previous ones.
// TODO: BUG! autovars in arguments are already on stack, we don't have to reserve space
for (int i = n_auto_vars; i > 0; i--) c.emitPushNull();
// TODO introduce instruction to reserve o+i space in one step
// Reserve integer stack place for int vars
for (int i = n_int_auto_vars; i > 0; i--) c.emitIConst_0();
// ------------------------------------------
// ------------------------------------------
// generate main code by descending the tree
// ------------------------------------------
code.generate_code(c, s);
// ------------------------------------------
// ------------------------------------------
// generate epilogue code here
// ------------------------------------------
if (requestDebug) c.emitDebug((byte) 0x2, "Disabled debug");
c.emitRet(); // catch the fall-out
// ------------------------------------------
}
public void generateLlvmCode(CodeGeneratorState s, BufferedWriter llvmFile)
throws PlcException, IOException {
LlvmCodegen llc = new LlvmCodegen(s.get_class(), this, llvmFile);
StringBuilder argdef = new StringBuilder();
boolean firstParm = true;
for (ArgDefinition a : args_def) {
if (!firstParm) argdef.append(", ");
firstParm = false;
argdef.append("i64 %" + a.getName());
}
String llvmMethodName = name;
name = name.replaceAll("<init>", "_\\$_Constructor");
llc.putln(String.format("define %s @%s(%s) {", llc.getObjectType(), name, argdef)); // function
if (code != null) {
// ------------------------------------------
// traverse tree to allocate automatic vars?
// ------------------------------------------
// int n_auto_vars = svars.getUsedSlots();
// int n_int_auto_vars = isvars.getUsedSlots();
// ------------------------------------------
// ------------------------------------------
// generate prologue code here
// ------------------------------------------
/*
// check number of args
int n_args = args_def.size();
String good_args_label = c.getLabel();
c.emitIConst_32bit(n_args);
c.emitISubLU();
c.emitJz(good_args_label);
// wrong count - throw string
// BUG! Need less consuming way of reporting this. Maybe by
// calling class object Method? Or by summoning something?
c.emitString("arg count: "+name + " in " + s.get_class().getName());
c.emitThrow();
c.markLabel(good_args_label);
*/
if (requestDebug) llc.emitDebug((byte) 0x1);
// if(requestDebug) llc.emitDebug((byte)0x1,"Enabled debug");
// push nulls to reserve stack space for autovars
// BUG! We can execute vars initialization code here, can we?
// We can if code does not depend on auto vars itself, or depends only on
// previous ones.
// for( int i = n_auto_vars; i > 0; i-- ) c.emitPushNull();
// Reserve integer stack place for int vars for( int i = n_int_auto_vars; i > 0; i-- )
// c.emitIConst_0();
// ------------------------------------------
// ------------------------------------------
// generate main code by descending the tree
// ------------------------------------------
code.generateLlvmCode(llc);
// ------------------------------------------
// ------------------------------------------
// generate epilogue code here
// ------------------------------------------
// if(requestDebug) c.emitDebug((byte)0x2,"Disabled debug");
if (requestDebug) llc.emitDebug((byte) 0x2);
}
// catch the fall-out
llc.putln("ret " + llc.getObjectType() + " <{ i8* null, i8* null }> ;"); // empty function code
llc.putln("}"); // end of function
// ------------------------------------------
// Part of code is generated to the buffer to
// be emitted after the method code. Flush it
// now.
// ------------------------------------------
llc.flushPostponedCode();
}