mips without optimize

midend/llvm/instr/LoadInstr.java

@@ -1,20 +1,39 @@
-package midend.llvm.instr;
-
-import midend.llvm.type.IrPointerType;
-import midend.llvm.value.IrValue;
-
-public class LoadInstr extends IrInstr {
-    public LoadInstr(IrValue pointer, String name) {
-        super(((IrPointerType) pointer.getType()).getPointeeType(), name, IrInstrType.LOAD);
-        addUse(pointer);
-    }
-
-    public IrValue getPointer() {
-        return getUse(0);
-    }
-
-    public String toString() {
-        return getName() + " = load " + getType() + ", "
-                + getPointer().getType() + " " + getPointer().getName();
-    }
-}
+package midend.llvm.instr;
+
+import backend.mips.MipsBuilder;
+import backend.mips.Register;
+import backend.mips.instr.MipsLs;
+import backend.mips.instr.type.MipsLsType;
+import midend.llvm.type.IrPointerType;
+import midend.llvm.value.IrValue;
+
+public class LoadInstr extends IrInstr {
+    public LoadInstr(IrValue pointer, String name) {
+        super(((IrPointerType) pointer.getType()).getPointeeType(), name, IrInstrType.LOAD);
+        addUse(pointer);
+    }
+
+    public IrValue getPointer() {
+        return getUse(0);
+    }
+
+    public String toString() {
+        return getName() + " = load " + getType() + ", "
+                + getPointer().getType() + " " + getPointer().getName();
+    }
+
+    public void toMips() {
+        IrValue pointer = getPointer();
+        Register reg = MipsBuilder.getRegister(pointer);
+        if (reg == null) { // 未分配寄存器情况
+            reg = Register.K0;
+        }
+        loadValueToReg(pointer, reg);
+        Register resultReg = MipsBuilder.getRegister(this);
+        if (resultReg == null) {
+            resultReg = Register.K1;
+        }
+        new MipsLs(MipsLsType.LW, resultReg, reg, 0);
+        saveResult(this, resultReg);
+    }
+}