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Peter Wang b45b70199b Add a post-processing pass directly after mode checking that tries to transform

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Branches: main

Add a post-processing pass directly after mode checking that tries to transform
procedures to avoid intermediate partially instantiated data structures.  The
Erlang backend in particular cannot handle partially instantiated data
structures.

compiler/delay_partial_inst.m:
	New module.

compiler/check_hlds.m:
	Import delay_partial_inst.m

compiler/modes.m:
	Call the delay partial instantiations pass after mode checking succeeds
	if it is enabled.

compiler/options.m:
	Add a new internal option `--delay-partial-instantiations', disabled by
	default.

compiler/handle_options.m:
	Make Erlang target imply --delay-partial-instantiations.

compiler/notes/compiler_design.html:
	Mention delay_partial_inst.m

tests/hard_coded/Mercury.options:
tests/hard_coded/Mmakefile:
tests/hard_coded/delay_partial_test.exp:
tests/hard_coded/delay_partial_test.m:
tests/hard_coded/delay_partial_test2.exp:
tests/hard_coded/delay_partial_test2.m:
	Add test cases for --delay-partial-instantiations.

compiler/goal_util.m:
	Fix a comment.

2007-06-25 00:58:14 +00:00

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 implied mode call 1 ok
 implied mode call 2 ok
 blah(42, 43, 'x')
 {blah(-42, -42, 'x'), blah(43, -42, 'x')}