Zdenek Dvorak
dc14f1915c
re PR rtl-optimization/27735 (ICE at -O3 caused by loop unswitching)
PR rtl-optimization/27735 * cfgloopmanip.c (fix_loop_placements, fix_bb_placements, unloop): Add new argument to keep track of whether an irreducible region was affected. All callers changed. (fix_irreducible_loops): Removed. (remove_path): Call mark_irreducible_loops if EDGE_IRREDUCIBLE_LOOP flags were invalidated. * gcc.dg/loop-unswitch-1.c: New test. From-SVN: r116582
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