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dcf78c3447
Estimated hours taken: 0.1 Branches: release runtime/mercury_unify_compare_body.h: Add a mechanism, conditional on #ifdef MR_CHECK_DU_EQ, for testing whether two values are bit-for-bit identical before invoking any of the more specific unify or compare code. Fix some old bugs which showed up only with -DMR_COMPARE_BY_RTTI: we were invoking some macros with the wrong number of arguments. runtime/mercury_conf_param.h: Document MR_CHECK_DU_EQ. Turn it on unless another macro, MR_DISABLE_CHECK_DU_EQ, is defined. This improves performance by six percent. (Thanks to Ralph for the reminder to evaluate this again. When I tried this several years ago, it was a performance loss.) tests/debugger/uci.exp2: Add this new expected output file for this test. While uci.exp contains the expected output without -DMR_CHECK_DU_EQ, uci.exp2 contains the expected output with it, since we no longer get calls to the type-specific unify and compare predicates in some cases.
Reportedly Mercury does not work on Solaris 2.5.1 if it is compiled with
gcc 2.7.x. It should however work fine on Solaris 2.5.1 if you compile
it with gcc 2.8, or if you use gcc 2.7.x with an earlier version of Solaris.
The binary distribution for Solaris that we distribute was compiled
with gcc 2.7.2, so if you have Solaris 2.5.1, you may need to compile
Mercury yourself from our source distribution.
("Solaris 2.x" is also known as "SunOS 5.x".)