[m-rev.] diff: fix for mantis bug 134

[Zoltan Somogyi]

I am bootchecking it at the moment, but the fix is straightforward.
I will also add bug134.m as a test case.

Fix Mantis bug #134.

compiler/ml_disj_gen.m:
	If the options specify --no-static-ground-terms, do not try to
	generate lookup tables for disjunctions; the trying would lead
	to a compiler abort (bug 134), and we cannot generate the table
	anyway.

Zoltan.

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Index: compiler/ml_disj_gen.m
===================================================================
RCS file: /home/mercury/mercury1/repository/mercury/compiler/ml_disj_gen.m,v
retrieving revision 1.2
diff -u -b -r1.2 ml_disj_gen.m
--- compiler/ml_disj_gen.m	7 Oct 2009 03:31:52 -0000	1.2
+++ compiler/ml_disj_gen.m	3 Mar 2010 07:44:43 -0000
@@ -125,6 +125,7 @@
 :- import_module hlds.hlds_module.
 :- import_module libs.compiler_util.
 :- import_module libs.globals.
+:- import_module libs.options.
 :- import_module ml_backend.ml_code_gen.
 :- import_module ml_backend.ml_code_util.
 :- import_module ml_backend.ml_gen_info.
@@ -153,10 +154,17 @@
             LaterDisjuncts = [_ | _],
             (
                 CodeModel = model_non,
-                ml_gen_info_get_target(!.Info, Target),
-                DisjNonLocals = goal_info_get_nonlocals(GoalInfo),
                 (
+                    ml_gen_info_get_target(!.Info, Target),
                     allow_lookup_disj(Target) = yes,
+
+                    ml_gen_info_get_module_info(!.Info, ModuleInfo),
+                    module_info_get_globals(ModuleInfo, Globals),
+                    globals.lookup_bool_option(Globals, static_ground_cells,
+                        StaticGroundCells),
+                    StaticGroundCells = yes,
+
+                    DisjNonLocals = goal_info_get_nonlocals(GoalInfo),
                     all_disjuncts_are_conj_of_unify(DisjNonLocals, Disjuncts)
                 ->
                     % Since the MLDS backend implements trailing by a
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