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.text
.global test_dot_req_and_unreq
test_dot_req_and_unreq:
# Check that builtin register alias 'r0' works.
add r0, r0, r0
# Create an alias for r0.
foo .req r0
# Check that it works.
add foo, foo, foo
# Now remove the alias.
.unreq foo
# And make sure that it no longer works.
add foo, foo, foo
# Attempt to remove the builtin alias for r0.
.unreq r0
# That is ignored, so this should still work.
add r0, r0, r0
# Now attempt to re-alias foo. There used to be a bug whereby the
# first creation of an alias called foo would also create an alias
# called FOO, but the .unreq of foo would not delete FOO. Thus a
# second attempt at aliasing foo (to something different than
# before) would fail because the assembler would complain that FOO
# already existed.
foo .req r1
add foo, foo, foo
# Check that the upper case alias was also recreated.
add FOO, FOO, FOO
# Check that a second attempt to alias foo, using a mixed case
# version of the name, will fail.
Foo .req r2
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