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88047bbb45
tests/general/float_test.exp3:
tests/general/float_test.m:
tests/general/read_dir_regression.exp4:
tests/general/read_dir_regression.m:
tests/hard_coded/remove_file.exp2:
tests/hard_coded/remove_file.m:
Delete Erlang backend specific expected outputs.
tests/hard_coded/Mmakefile:
tests/hard_coded/erlang_deconstruct.exp:
tests/hard_coded/erlang_deconstruct.m:
tests/hard_coded/existential_list.exp:
tests/hard_coded/existential_list.m:
tests/valid/Mmakefile:
tests/valid/erl_ite_vars.m:
tests/valid/zf_erlang_bug.m:
Delete erlang target specific tests.
tests/*:
Delete Erlang foreign procs and foreign types.
86 lines
2.1 KiB
Mathematica
86 lines
2.1 KiB
Mathematica
%---------------------------------------------------------------------------%
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% vim: ts=4 sw=4 et ft=mercury
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%---------------------------------------------------------------------------%
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%
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% This is a regression test for a code generation bug, fixed
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% on 16 november 1999.
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%
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% The bug was that if the failure continuation was a known address,
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% the code in code_info.m for implementing commits assumed that the
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% redoip slot of the top nondet stack frame had this address in it,
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% and that therefore it could override this slot without remembering
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% what was originally in it.
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%
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% The determinism declarations of foo and bar are intentionally too loose;
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% the bug does not reveal itself, even if it exists, with the correct, tight
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% determinism declarations. The test for the bug also requires compilation
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% with inlining turned off.
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:- module redoip_clobber.
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:- interface.
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:- import_module io.
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:- pred main(io::di, io::uo) is det.
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:- implementation.
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:- import_module int.
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:- import_module std_util.
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:- pred foo(int).
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:- mode foo(out) is nondet.
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foo(X) :- bar(X), fail.
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foo(X) :- X = 2.
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:- pred bar(int).
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:- mode bar(out) is nondet.
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bar(X) :- X = 1.
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:- pred use(int).
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:- mode use(in) is semidet.
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:- pragma foreign_proc("C",
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use(X::in),
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[will_not_call_mercury, promise_pure],
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"
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/*
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** To exhibit the bug, this predicate needs only to fail.
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** However, the symptom of the bug is an infinite loop.
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** To detect the presence of the bug in finite time,
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** we abort execution if this code is executed too many times.
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**
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** We mention X here to shut up a warning.
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*/
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static int counter = 0;
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if (++counter > 100) {
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MR_fatal_error(""the bug is back"");
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}
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SUCCESS_INDICATOR = MR_FALSE;
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").
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:- pragma foreign_proc("C#",
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use(_X::in),
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[will_not_call_mercury, promise_pure],
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"
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SUCCESS_INDICATOR = false;
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").
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:- pragma foreign_proc("Java",
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use(_X::in),
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[will_not_call_mercury, promise_pure],
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"
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SUCCESS_INDICATOR = false;
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").
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main(!IO) :-
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( if foo(X), use(X) then
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io.write_string("Succeeded.\n", !IO)
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else
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io.write_string("Failed.\n", !IO)
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).
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