GCC plugin: 'internal compiler error' in passes.c -


i have been writing gcc inter procedural plugin have insert gimple statements @ points in program. after perform data flow analysis on complete program. when done analysis removing newly inserted gimple statements.

my analysis getting completed before exiting following message generated:

internal compiler error: in execute_ipa_pass_list, @ passes.c:1817

this surely because of insertion of gimple statements, if don't won't error message.

could me out , explain problem , how fix it?

this happens when gcc code contains assertion turns out false.

the line 1817 in passes.c (which part of gcc sources, in gcc sub-directory of gcc source tree) has piece of code looks like:

gcc_assert (some_condition);

in case, some_condition false, compiler expects true (this why author of code wrote assertion in first place).

you did in plugin made false, , need fix it.

what did wrong? depends. open passes.c , find line, , see checking. in copy of gcc, relevant function reads:

void execute_ipa_pass_list (struct opt_pass *pass) {       {       /* assertion.  */       gcc_assert (!current_function_decl);       /* assertion.  */       gcc_assert (!cfun);       /* assertion.  */       gcc_assert (pass->type == simple_ipa_pass || pass->type == ipa_pass);       if (execute_one_pass (pass) && pass->sub)         {           if (pass->sub->type == gimple_pass)             {               invoke_plugin_callbacks (plugin_early_gimple_passes_start, null);               do_per_function_toporder ((void (*)(void *))execute_pass_list,                                         pass->sub);               invoke_plugin_callbacks (plugin_early_gimple_passes_end, null);             }           else if (pass->sub->type == simple_ipa_pass                    || pass->sub->type == ipa_pass)             execute_ipa_pass_list (pass->sub);           else             gcc_unreachable ();         }       /* assertion.  */       gcc_assert (!current_function_decl);       cgraph_process_new_functions ();       pass = pass->next;     }   while (pass); }

there 4 gcc_assert statements. plugin caused 1 of them become false. i.e. messed 1 of variables:

current_function_decl cfun pass->type

this what's wrong.


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