diff options
Diffstat (limited to 'gcc/tree-ssa-loop-ivcanon.c')
| -rw-r--r-- | gcc/tree-ssa-loop-ivcanon.c | 41 |
1 files changed, 20 insertions, 21 deletions
diff --git a/gcc/tree-ssa-loop-ivcanon.c b/gcc/tree-ssa-loop-ivcanon.c index 46e1531..c4d8573 100644 --- a/gcc/tree-ssa-loop-ivcanon.c +++ b/gcc/tree-ssa-loop-ivcanon.c @@ -154,13 +154,12 @@ estimated_unrolled_size (unsigned HOST_WIDE_INT ninsns, return unr_insns; } -/* Tries to unroll LOOP completely, i.e. NITER times. LOOPS is the - loop tree. UL determines which loops we are allowed to unroll. +/* Tries to unroll LOOP completely, i.e. NITER times. + UL determines which loops we are allowed to unroll. EXIT is the exit of the loop that should be eliminated. */ static bool -try_unroll_loop_completely (struct loops *loops ATTRIBUTE_UNUSED, - struct loop *loop, +try_unroll_loop_completely (struct loop *loop, edge exit, tree niter, enum unroll_level ul) { @@ -237,7 +236,7 @@ try_unroll_loop_completely (struct loops *loops ATTRIBUTE_UNUSED, RESET_BIT (wont_exit, 0); if (!tree_duplicate_loop_to_header_edge (loop, loop_preheader_edge (loop), - loops, n_unroll, wont_exit, + n_unroll, wont_exit, exit, edges_to_remove, &n_to_remove, DLTHE_FLAG_UPDATE_FREQ @@ -266,14 +265,14 @@ try_unroll_loop_completely (struct loops *loops ATTRIBUTE_UNUSED, return true; } -/* Adds a canonical induction variable to LOOP if suitable. LOOPS is the loops - tree. CREATE_IV is true if we may create a new iv. UL determines +/* Adds a canonical induction variable to LOOP if suitable. + CREATE_IV is true if we may create a new iv. UL determines which loops we are allowed to completely unroll. If TRY_EVAL is true, we try to determine the number of iterations of a loop by direct evaluation. Returns true if cfg is changed. */ static bool -canonicalize_loop_induction_variables (struct loops *loops, struct loop *loop, +canonicalize_loop_induction_variables (struct loop *loop, bool create_iv, enum unroll_level ul, bool try_eval) { @@ -318,7 +317,7 @@ canonicalize_loop_induction_variables (struct loops *loops, struct loop *loop, fprintf (dump_file, " times.\n"); } - if (try_unroll_loop_completely (loops, loop, exit, niter, ul)) + if (try_unroll_loop_completely (loop, exit, niter, ul)) return true; if (create_iv) @@ -328,21 +327,21 @@ canonicalize_loop_induction_variables (struct loops *loops, struct loop *loop, } /* The main entry point of the pass. Adds canonical induction variables - to the suitable LOOPS. */ + to the suitable loops. */ unsigned int -canonicalize_induction_variables (struct loops *loops) +canonicalize_induction_variables (void) { unsigned i; struct loop *loop; bool changed = false; - for (i = 1; i < loops->num; i++) + for (i = 1; i < current_loops->num; i++) { - loop = loops->parray[i]; + loop = current_loops->parray[i]; if (loop) - changed |= canonicalize_loop_induction_variables (loops, loop, + changed |= canonicalize_loop_induction_variables (loop, true, UL_SINGLE_ITER, true); } @@ -361,16 +360,16 @@ canonicalize_induction_variables (struct loops *loops) size of the code does not increase. */ unsigned int -tree_unroll_loops_completely (struct loops *loops, bool may_increase_size) +tree_unroll_loops_completely (bool may_increase_size) { unsigned i; struct loop *loop; bool changed = false; enum unroll_level ul; - for (i = 1; i < loops->num; i++) + for (i = 1; i < current_loops->num; i++) { - loop = loops->parray[i]; + loop = current_loops->parray[i]; if (!loop) continue; @@ -379,7 +378,7 @@ tree_unroll_loops_completely (struct loops *loops, bool may_increase_size) ul = UL_ALL; else ul = UL_NO_GROWTH; - changed |= canonicalize_loop_induction_variables (loops, loop, + changed |= canonicalize_loop_induction_variables (loop, false, ul, !flag_tree_loop_ivcanon); } @@ -562,15 +561,15 @@ try_remove_empty_loop (struct loop *loop, bool *changed) return true; } -/* Remove the empty LOOPS. */ +/* Remove the empty loops. */ unsigned int -remove_empty_loops (struct loops *loops) +remove_empty_loops (void) { bool changed = false; struct loop *loop; - for (loop = loops->tree_root->inner; loop; loop = loop->next) + for (loop = current_loops->tree_root->inner; loop; loop = loop->next) try_remove_empty_loop (loop, &changed); if (changed) |