private boolean isThisPointerReg(int startReg) {
    // "this" is always the first parameter.
    return startReg == 0 && !ssaMeth.isStatic();
  }
Returns true if given rop register represents the {@code this} pointer for a non-static method.

@param startReg rop register
@return true if the "this" pointer is located here.
android/android_framework/dex-maker/src/main/java/com/android/dx/ssa/back/FirstFitLocalCombiningAllocator.java