re PR tree-optimization/88533 (Higher performance penalty of array-bounds checking for sparse-matrix vector multiply)
2018-12-19 Richard Biener <rguenther@suse.de>
PR tree-optimization/88533
Revert
2018-04-30 Richard Biener <rguenther@suse.de>
PR tree-optimization/28364
PR tree-optimization/85275
* tree-ssa-loop-ch.c (ch_base::copy_headers): Stop after
copying first exit test.
* gcc.dg/tree-ssa/ssa-dom-thread-7.c: Adjust.
* tree-ssa-loop-ch.c: Include tree-phinodes.h and
ssa-iterators.h.
(should_duplicate_loop_header_p): Track whether stmt compute
loop invariants or values based on IVs. Apart from the
original loop header only duplicate blocks with exit tests
that are based on IVs or invariants.
* gcc.dg/tree-ssa/copy-headers-6.c: New testcase.
* gcc.dg/tree-ssa/copy-headers-7.c: Likewise.
* gcc.dg/tree-ssa/ivopt_mult_1.c: Un-XFAIL.
* gcc.dg/tree-ssa/ivopt_mult_2.c: Likewise.
From-SVN: r267262
