#include "langhooks.h"
#include "cfgloop.h"
#include "tree-ssa-sccvn.h"
+#include "tree-scalar-evolution.h"
#include "params.h"
#include "dbgcnt.h"
else if (!opresult)
break;
}
+ /* We can't possibly insert these. */
+ else if (op1 && !is_gimple_min_invariant (op1))
+ break;
changed |= op1 != oldop1;
if (op2 && TREE_CODE (op2) == SSA_NAME)
{
else if (!opresult)
break;
}
+ /* We can't possibly insert these. */
+ else if (op2 && !is_gimple_min_invariant (op2))
+ break;
changed |= op2 != oldop2;
if (!newoperands)
pre_expr op1expr;
tree genop2 = currop->op1;
pre_expr op2expr;
- tree genop3;
+ tree genop3 = currop->op2;
+ pre_expr op3expr;
genop0 = create_component_ref_by_pieces_1 (block, ref, operand,
stmts, domstmt);
if (!genop0)
if (!genop2)
return NULL_TREE;
}
-
- genop3 = currop->op2;
+ if (genop3)
+ {
+ tree elmt_type = TREE_TYPE (TREE_TYPE (genop0));
+ genop3 = size_binop (EXACT_DIV_EXPR, genop3,
+ size_int (TYPE_ALIGN_UNIT (elmt_type)));
+ op3expr = get_or_alloc_expr_for (genop3);
+ genop3 = find_or_generate_expression (block, op3expr, stmts,
+ domstmt);
+ if (!genop3)
+ return NULL_TREE;
+ }
return build4 (currop->opcode, currop->type, genop0, genop1,
genop2, genop3);
}
}
+/* Returns true if we want to inhibit the insertions of PHI nodes
+ for the given EXPR for basic block BB (a member of a loop).
+ We want to do this, when we fear that the induction variable we
+ create might inhibit vectorization. */
+
+static bool
+inhibit_phi_insertion (basic_block bb, pre_expr expr)
+{
+ vn_reference_t vr = PRE_EXPR_REFERENCE (expr);
+ VEC (vn_reference_op_s, heap) *ops = vr->operands;
+ vn_reference_op_t op;
+ unsigned i;
+
+ /* If we aren't going to vectorize we don't inhibit anything. */
+ if (!flag_tree_vectorize)
+ return false;
+
+ /* Otherwise we inhibit the insertion when the address of the
+ memory reference is a simple induction variable. In other
+ cases the vectorizer won't do anything anyway (either it's
+ loop invariant or a complicated expression). */
+ for (i = 0; VEC_iterate (vn_reference_op_s, ops, i, op); ++i)
+ {
+ switch (op->opcode)
+ {
+ case ARRAY_REF:
+ case ARRAY_RANGE_REF:
+ if (TREE_CODE (op->op0) != SSA_NAME)
+ break;
+ /* Fallthru. */
+ case SSA_NAME:
+ {
+ basic_block defbb = gimple_bb (SSA_NAME_DEF_STMT (op->op0));
+ affine_iv iv;
+ /* Default defs are loop invariant. */
+ if (!defbb)
+ break;
+ /* Defined outside this loop, also loop invariant. */
+ if (!flow_bb_inside_loop_p (bb->loop_father, defbb))
+ break;
+ /* If it's a simple induction variable inhibit insertion,
+ the vectorizer might be interested in this one. */
+ if (simple_iv (bb->loop_father, bb->loop_father,
+ op->op0, &iv, true))
+ return true;
+ /* No simple IV, vectorizer can't do anything, hence no
+ reason to inhibit the transformation for this operand. */
+ break;
+ }
+ default:
+ break;
+ }
+ }
+ return false;
+}
+
/* Insert the to-be-made-available values of expression EXPRNUM for each
predecessor, stored in AVAIL, into the predecessors of BLOCK, and
merge the result with a phi node, given the same value number as
}
/* Make sure we aren't creating an induction variable. */
- if (block->loop_depth > 0 && EDGE_COUNT (block->preds) == 2
- && expr->kind != REFERENCE)
+ if (block->loop_depth > 0 && EDGE_COUNT (block->preds) == 2)
{
bool firstinsideloop = false;
bool secondinsideloop = false;
secondinsideloop = flow_bb_inside_loop_p (block->loop_father,
EDGE_PRED (block, 1)->src);
/* Induction variables only have one edge inside the loop. */
- if (firstinsideloop ^ secondinsideloop)
+ if ((firstinsideloop ^ secondinsideloop)
+ && (expr->kind != REFERENCE
+ || inhibit_phi_insertion (block, expr)))
{
if (dump_file && (dump_flags & TDF_DETAILS))
fprintf (dump_file, "Skipping insertion of phi for partial redundancy: Looks like an induction variable\n");
gcc_assert (get_expr_type (ae) == type
|| useless_type_conversion_p (type, get_expr_type (ae)));
if (ae->kind == CONSTANT)
- add_phi_arg (phi, PRE_EXPR_CONSTANT (ae), pred);
+ add_phi_arg (phi, PRE_EXPR_CONSTANT (ae), pred, UNKNOWN_LOCATION);
else
- add_phi_arg (phi, PRE_EXPR_NAME (avail[pred->src->index]), pred);
+ add_phi_arg (phi, PRE_EXPR_NAME (avail[pred->src->index]), pred,
+ UNKNOWN_LOCATION);
}
newphi = get_or_alloc_expr_for_name (gimple_phi_result (phi));
gimple_call_set_fn (stmt, fn);
update_stmt (stmt);
if (maybe_clean_or_replace_eh_stmt (stmt, stmt))
- gimple_purge_dead_eh_edges (b);
+ {
+ bitmap_set_bit (need_eh_cleanup,
+ gimple_bb (stmt)->index);
+ if (dump_file && (dump_flags & TDF_DETAILS))
+ fprintf (dump_file, " Removed EH side effects.\n");
+ }
/* Changing an indirect call to a direct call may
have exposed different semantics. This may
return 0;
}
init_pre (do_fre);
+ scev_initialize ();
/* Collect and value number expressions computed in each basic block. */
if (!do_fre)
remove_dead_inserted_code ();
+ scev_finalize ();
fini_pre (do_fre);
return todo;
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