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a3819d359c
Estimated hours taken: 15 Branches: main Fix the handling of purity in the optimization and tabling passes. Without this change tests/tabling/unused_args.m fails with inter-module optimization. compiler/purity.m: compiler/post_typecheck.m: Allow purity checking to be rerun on a single procedure without requiring an io__state. If the purity is worse (due to inlining a predicate with a `:- pragma promise_pure' declaration), add `promised_pure' or `promised_semipure' to the pred_info. compiler/hlds_out.m: compiler/hlds_pred.m: compiler/intermod.m: compiler/make_hlds.m: compiler/mercury_to_mercury.m: compiler/module_qual.m: compiler/modules.m: compiler/prog_data.m: compiler/prog_io_pragma.m: compiler/purity.m: doc/reference_manual.texi: NEWS: Implement `:- pragma promise_semipure'. This is needed if an predicate marked `promised_pure' which calls impure predicates is inlined into a semipure predicate. compiler/inlining.m: Make sure the purity markers on the goal_infos are correct after inlining predicates which are promised pure. Export a predicate inlining__can_inline_proc which is used by deforestation to determine whether inlining a procedure will change the semantics or will break code generator invariants. compiler/deforest.m: Use the same method as inlining.m to work out whether a procedure can be inlined. Don't inline predicates which are promised pure because the extra impurity which will be propagated through the goal will stop deforestation working on the goal. compiler/simplify.m: Make sure the goal_info resulting from converting a singleton switch into a conjunction has the correct purity. compiler/table_gen.m: Make sure the purity markers on the generated goal_infos are correct. Make sure that call_table_gen goal features cannot be removed by optimization passes. Don't put unnecessary `impure' markers on calls to error/1. tests/debugger/loopcheck.exp: tests/debugger/retry.exp: Adjust the expected output. The change to ensure that `call_table_gen' goal features can't be removed alters the goal paths slightly. tests/invalid/impure_method_impl.m: Adjust the expected output now that predicates can be promised semipure.
29 lines
1.4 KiB
Plaintext
29 lines
1.4 KiB
Plaintext
1: 1 1 CALL pred loopcheck:main/2-0 (det) loopcheck.m:13
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mdb> echo on
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Command echo enabled.
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mdb> context nextline
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Contexts will be printed on the next line.
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mdb> continue -a
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2: 2 2 CALL pred loopcheck:loop/1-0 (erroneous)
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loopcheck.m:21 (from loopcheck.m:14)
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3: 2 2 ELSE pred loopcheck:loop/1-0 (erroneous) c2;e;
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loopcheck.m:21
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4: 2 2 ELSE pred loopcheck:loop/1-0 (erroneous) c2;e;e;
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loopcheck.m:21
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5: 3 3 CALL pred loopcheck:loop/1-0 (erroneous)
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loopcheck.m:21 (from loopcheck.m:21)
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6: 3 3 ELSE pred loopcheck:loop/1-0 (erroneous) c2;e;
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loopcheck.m:21
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7: 3 3 THEN pred loopcheck:loop/1-0 (erroneous) c2;e;t;
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loopcheck.m:21
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8: 3 3 EXCP pred loopcheck:loop/1-0 (erroneous)
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loopcheck.m:21 (from loopcheck.m:21)
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9: 2 2 EXCP pred loopcheck:loop/1-0 (erroneous)
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loopcheck.m:21 (from loopcheck.m:14)
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10: 1 1 EXCP pred loopcheck:main/2-0 (det)
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loopcheck.m:14
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Uncaught exception:
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Software Error: detected infinite recursion in pred loopcheck:loop/1
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Last trace event was event #10.
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Last trace event before the unhandled exception was event #7.
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