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avoid adding risc instructions twice

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that causes loops in the chain
infinite loops in the code that are hard to debug
closes #11
This commit is contained in:
Torsten Ruger
2018-08-19 17:29:04 +03:00
parent f85fe8a2cb
commit 9687d6611f
7 changed files with 37 additions and 19 deletions
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67
test/mom/instruction/test_return_sequence.rb
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@ -1,67 +0,0 @@
require_relative "../helper"
module Risc
class TestReturnSequence < MiniTest::Test
include Statements
def setup
super
@input = "5.div4"
@expect = "something"
@produced = produce_instructions
end
def instruction(num) # 18 is the main, see length in test/mom/send/test_setup_simple.rb
@produced.next( 18 + num)
end
def test_postamble_classes
postamble.each_with_index do |ins , index|
assert_equal ins , instruction( index).class , "wrong at #{index}"
end
end
def test_main_label
assert_equal Label , instruction(0).class
assert_equal "return_label" , instruction(0).name
end
def test_move_ret
assert_slot_to_reg( instruction( 1 ) , :r0 , 5 , :r1 )
end
def test_move_caller
assert_slot_to_reg( instruction( 2 ) , :r0 , 6 , :r2 )
end
def test_save_ret
assert_reg_to_slot( instruction( 3 ) , :r1 , :r2 , 5 )
end
def test_load_space
assert_load( instruction(4) , Parfait::Space )
end
def test_get_next
assert_slot_to_reg( instruction( 5 ) , :r3 , 3 , :r4 )
end
def test_save_next
assert_reg_to_slot( instruction( 6 ) , :r4 , :r0 , 1 )
end
def test_save_this
assert_reg_to_slot( instruction( 7 ) , :r0 , :r3 , 3 )
end
def test_save_addr
assert_slot_to_reg( instruction( 8 ) , :r0 , 4 , :r1 )
end
def test_reduce_addr
assert_slot_to_reg( instruction( 9 ) , :r1 , 2 , :r1 )
end
def test_reduce_caller
assert_slot_to_reg( instruction( 10 ) , :r0 , 6 , :r0 )
end
def test_function_return
ret = instruction(11)
assert_equal FunctionReturn , ret.class
assert_equal :r1 , ret.register.symbol
end
def test_unreachable
assert_equal Label , instruction(12).class
assert_equal "unreachable" , instruction(12).name
end
end
end