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* params.def (PARAM_MAX_VARTRACK_SIZE): New. * doc/invoke.texi: Document it. * var-tracking.c: Include toplev.h and params.h. (vt_find_locations): Return bool indicating success. Compute hash sizes unconditionally. Check new parameter, report. (variable_tracking_main_1): Check vt_find_locations results and retry. Renamed from... (variable_tracking_main): ... this. New wrapper to preserve flag_var_tracking_assignments. * Makefile.in (var-tracking.o): Adjust dependencies. * lib/prune.exp: Prune variable tracking size limit exceeded notes. From-SVN: r156794
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