PR tree-optimization/43984
* tree-ssa-pre.c (inserted_phi_names): Remove.
(inserted_exprs): Change to bitmap.
(create_expression_by_pieces): Set bits, don't append to vector.
(insert_into_preds_of_block): Don't handle inserted_phi_names.
(eliminate): Don't look at inserted_phi_names, remove deleted
insns from inserted_exprs.
(remove_dead_inserted_code): Adjust to use bitmaps instead of
vectors.
(init_pre, fini_pre): Allocate and free bitmaps.
(execute_pre): Insert insns on edges before elimination.
testsuite/
* gfortran.dg/pr43984.f90: New test.
From-SVN: r159106
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