diff --git a/src/main/java/chocopy/pa3/CodeGenImpl.java b/src/main/java/chocopy/pa3/CodeGenImpl.java index f0483d8..0d474b7 100644 --- a/src/main/java/chocopy/pa3/CodeGenImpl.java +++ b/src/main/java/chocopy/pa3/CodeGenImpl.java @@ -322,6 +322,8 @@ public class CodeGenImpl extends CodeGenBase backend.emitSW(tmp, SP, -1 * wordSize, "Push static link onto active frame."); freeRegister(tmpHandle); + } else { + backend.emitSW(FP, SP, -1 * wordSize, "Push static link onto active frame."); } List args = node.args; @@ -429,7 +431,7 @@ public class CodeGenImpl extends CodeGenBase @Override public Register analyze(StringLiteral node) { - System.out.println("Inside StringLiteral: "); + System.out.println("Inside StringLiteral: "); backend.emitLW(T6, FP, 0, "Inside StringLiteral: "); Label l = constants.getStrConstant(node.value); backend.emitLA(Register.A0, l, "Load string literal"); @@ -447,6 +449,7 @@ public class CodeGenImpl extends CodeGenBase backend.emitLI(Register.A0, 0, "Load boolean literal: false "); return Register.A0; } + class StackVarRuntimeInfo { public final int off; public final Register sl; @@ -468,6 +471,7 @@ public class CodeGenImpl extends CodeGenBase } } } + private Object getVar(Identifier id){ SymbolInfo info = sym.get(id.name); if(info instanceof StackVarInfo) @@ -475,23 +479,67 @@ public class CodeGenImpl extends CodeGenBase else return ((GlobalVarInfo)info).getLabel(); } + private StackVarRuntimeInfo getStackVar(StackVarInfo info){ FuncInfo varFuncInfo = info.getFuncInfo(); + System.out.println("var name: " + info.getVarName()); System.out.println("varfuncInfo name: " + varFuncInfo.getFuncName()); System.out.println("var idx: " + varFuncInfo.getVarIndex(info.getVarName())); - int tmpHandle = getRegister(); + + int tmpHandle = getRegister(); Register tmp = registerPool[tmpHandle]; - if (funcInfo == info.getFuncInfo() || funcInfo == null) { - backend.emitMV(tmp, FP, "We are referencing local variable"); + if (funcInfo != null && funcInfo != info.getFuncInfo()) { + int varFunDepth = varFuncInfo.getDepth(); + int callerDepth = funcInfo.getDepth(); + int jumps = callerDepth - varFunDepth; + System.out.println("varFunDepth: " + varFunDepth); + System.out.println("callerDepth: " + callerDepth); + + + backend.emitMV(tmp, FP, "Load FP"); + + FuncInfo curr = funcInfo; + for (int i = 0; i < jumps; i++) { + backend.emitLW(tmp, tmp, curr.getParams().size()*wordSize, "Load static link from " + curr.getFuncName() + " to " + curr.getParentFuncInfo().getBaseName()); + curr = curr.getParentFuncInfo(); + } + + System.out.println("We are referencing non local variable"); } else { - backend.emitLW(tmp, FP, funcInfo.getParams().size()*wordSize, "We are referencing non local variable"); + System.out.println("We are referencing local variable"); + backend.emitMV(tmp, FP, "We are referencing local variable"); } int idx = varFuncInfo.getVarIndex(info.getVarName()); int paramSize = varFuncInfo.getParams().size(); int offset = getLocalVarLocationOffset(idx, paramSize); + System.out.println("idx " +idx + " paramSize " + paramSize + " offset " + offset); + + +// - int curr_depth = funcInfo.getDepth(); +// - int d_depth = curr_depth - info.getFuncInfo().getDepth(); +// - if(d_depth == 0) { +// - int idx = funcInfo.getVarIndex(info.getVarName()); +// - int paramSize = funcInfo.getParams().size(); +// - int offset = getLocalVarLocationOffset(idx, paramSize); +// - return new StackVarRuntimeInfo(FP, offset); +// - } else +// - { +// - FuncInfo curr = funcInfo; +// - int tmpHandle = getRegister(); +// - Register tmp = registerPool[tmpHandle]; +// - backend.emitMV(tmp, FP, "tmp = FP"); +// - while(d_depth > 0){ +// - curr = curr.getParentFuncInfo(); +// - backend.emitLW(tmp, tmp, curr.getParams().size()*wordSize, "Get static link"); +// - -- d_depth; +// - } +// - // UNSAFE!!!!! PLEASE FREE THE TMP_HANDLE MANUALLY +// - return new StackVarRuntimeInfo(tmp, -wordSize*curr.getVarIndex(info.getVarName()), tmpHandle); +// - } + return new StackVarRuntimeInfo(tmp, offset, tmpHandle); }