re PR tree-optimization/46590 (long compile time with -O2 and many loops)
2012-09-05 Richard Guenther <rguenther@suse.de> PR tree-optimization/46590 * tree-ssa-loop-ivcanon.c (try_unroll_loop_completely): Do not update SSA form here. (canonicalize_induction_variables): Assert we do not need to update SSA form. (tree_unroll_loops_completely): Update SSA form here. * tree-ssa-loop-manip.c (gimple_duplicate_loop_to_header_edge): Do not verify loop-closed SSA form if SSA form is not up-to-date. From-SVN: r190978
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2012-09-05 Richard Guenther <rguenther@suse.de>
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PR tree-optimization/46590
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* tree-ssa-loop-ivcanon.c (try_unroll_loop_completely): Do not
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update SSA form here.
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(canonicalize_induction_variables): Assert we do not need to
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update SSA form.
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(tree_unroll_loops_completely): Update SSA form here.
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* tree-ssa-loop-manip.c (gimple_duplicate_loop_to_header_edge):
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Do not verify loop-closed SSA form if SSA form is not up-to-date.
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2012-09-05 Georg-Johann Lay <avr@gjlay.de>
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PR target/54461
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@ -414,7 +414,6 @@ try_unroll_loop_completely (struct loop *loop,
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else
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gimple_cond_make_false (cond);
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update_stmt (cond);
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update_ssa (TODO_update_ssa);
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if (dump_file && (dump_flags & TDF_DETAILS))
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fprintf (dump_file, "Unrolled loop %d completely.\n", loop->num);
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@ -493,6 +492,7 @@ canonicalize_induction_variables (void)
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true, UL_SINGLE_ITER,
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true);
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}
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gcc_assert (!need_ssa_update_p (cfun));
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/* Clean up the information about numbers of iterations, since brute force
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evaluation could reveal new information. */
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@ -536,6 +536,8 @@ tree_unroll_loops_completely (bool may_increase_size, bool unroll_outer)
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if (changed)
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{
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update_ssa (TODO_update_ssa);
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/* This will take care of removing completely unrolled loops
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from the loop structures so we can continue unrolling now
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innermost loops. */
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@ -752,7 +752,13 @@ gimple_duplicate_loop_to_header_edge (struct loop *loop, edge e,
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return false;
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#ifdef ENABLE_CHECKING
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if (loops_state_satisfies_p (LOOP_CLOSED_SSA))
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/* ??? This forces needless update_ssa calls after processing each
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loop instead of just once after processing all loops. We should
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instead verify that loop-closed SSA form is up-to-date for LOOP
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only (and possibly SSA form). For now just skip verifying if
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there are to-be renamed variables. */
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if (!need_ssa_update_p (cfun)
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&& loops_state_satisfies_p (LOOP_CLOSED_SSA))
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verify_loop_closed_ssa (true);
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#endif
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