def visitMethod_call(self, ctx: DecafParser.Method_callContext):
if ctx.method_name():
for i in range(len(ctx.expr())):
self.visit(ctx.expr(i))
self.st.stack_pointer[-1] += 8
self.body += 'movq %rax, ' + str(-self.st.stack_pointer[-1]) + '(%rsp)\n'
for i in range(len(ctx.expr())):
self.body += 'movq ' + str(-self.st.stack_pointer[-1]) + '(%rsp), ' + param_registers[
len(ctx.expr()) - i - 1] + '\n'
self.st.stack_pointer[-1] -= 8
# adjust stack to 16-byte alignment (multiple of 8 that is not divisible by 16)
stack_len = self.st.stack_pointer[-1]
stack_len = stack_len + (stack_len // 8 + 1 % 2) * 8
self.body += 'subq $' + str(stack_len) + ', %rsp\n'
method_name = ctx.method_name().getText()
self.body += 'call ' + method_name + '\n'
self.body += 'addq $' + str(stack_len) + ', %rsp\n'
elif ctx.CALLOUT():
for i in range(len(ctx.callout_arg())):
if ctx.callout_arg(i).STRING_LITERAL():
callout_arg = ctx.callout_arg(i).getText()
label = 'str' + str(ctx.callout_arg(i).start.start)
self.head += label + ': .asciz ' + callout_arg + '\n'
self.st.stack_pointer[-1] += 8
self.body += 'movq $' + label + ', ' + str(-self.st.stack_pointer[-1]) + '(%rsp)\n'
else:
pass
def visitMethod_call(self, ctx:DecafParser.Method_callContext):
if ctx.method_name():
for i in range(len(ctx.expr())):
self.visit(ctx.expr(i))
self.st.stack_pointer[-1] += 8
ptr = self.st.stack_pointer[-1]
self.body += 'movq %rax, ' + str(ptr) + '(%rsp)\n'
for z in range(len(ctx.expr())):
ptr = self.st.stack_pointer[-1]
reg = param_registers[z]
self.body += 'movq ' + str(ptr) + '(% rsp), ' + reg + '\n'
self.st.stack_pointer[-1] -= 8
#Current pos stored in symbol table
#Needs to be 16 byte aligned or we get segmentation errors
stack_len = self.st.stack_pointer[-1]
stack_len = stack_len + (int(stack_len/8+1) % 2) * 8
self.body += 'subq $' + str(stack_len) + ', %rsp\n'
method_name = ctx.method_name().getText()
self.body += 'call ' + method_name + '\n'
self.body += 'addq $' + str(stack_len) + ', %rsp\n'
elif ctx.CALLOUT():
pass
else:
self.visitChildren(ctx)