/* Data references and dependences detectors.
- Copyright (C) 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
+ Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009
+ Free Software Foundation, Inc.
Contributed by Sebastian Pop <pop@cri.ensmp.fr>
This file is part of GCC.
enum machine_mode pmode;
int punsignedp, pvolatilep;
+ op0 = TREE_OPERAND (op0, 0);
if (!handled_component_p (op0))
return false;
}
/* Analyzes the behavior of the memory reference DR in the innermost loop that
- contains it. */
+ contains it. Returns true if analysis succeed or false otherwise. */
-void
+bool
dr_analyze_innermost (struct data_reference *dr)
{
gimple stmt = DR_STMT (dr);
{
if (dump_file && (dump_flags & TDF_DETAILS))
fprintf (dump_file, "failed: bit offset alignment.\n");
- return;
+ return false;
}
base = build_fold_addr_expr (base);
- if (!simple_iv (loop, stmt, base, &base_iv, false))
+ if (!simple_iv (loop, loop_containing_stmt (stmt), base, &base_iv, false))
{
if (dump_file && (dump_flags & TDF_DETAILS))
fprintf (dump_file, "failed: evolution of base is not affine.\n");
- return;
+ return false;
}
if (!poffset)
{
offset_iv.base = ssize_int (0);
offset_iv.step = ssize_int (0);
}
- else if (!simple_iv (loop, stmt, poffset, &offset_iv, false))
+ else if (!simple_iv (loop, loop_containing_stmt (stmt),
+ poffset, &offset_iv, false))
{
if (dump_file && (dump_flags & TDF_DETAILS))
fprintf (dump_file, "failed: evolution of offset is not affine.\n");
- return;
+ return false;
}
init = ssize_int (pbitpos / BITS_PER_UNIT);
if (dump_file && (dump_flags & TDF_DETAILS))
fprintf (dump_file, "success.\n");
+
+ return true;
}
/* Determines the base object and the list of indices of memory reference
static void
dr_analyze_alias (struct data_reference *dr)
{
- gimple stmt = DR_STMT (dr);
tree ref = DR_REF (dr);
- tree base = get_base_address (ref), addr, smt = NULL_TREE;
- ssa_op_iter it;
- tree op;
- bitmap vops;
+ tree base = get_base_address (ref), addr;
- if (DECL_P (base))
- smt = base;
- else if (INDIRECT_REF_P (base))
+ if (INDIRECT_REF_P (base))
{
addr = TREE_OPERAND (base, 0);
if (TREE_CODE (addr) == SSA_NAME)
- {
- smt = symbol_mem_tag (SSA_NAME_VAR (addr));
- DR_PTR_INFO (dr) = SSA_NAME_PTR_INFO (addr);
- }
- }
-
- DR_SYMBOL_TAG (dr) = smt;
-
- vops = BITMAP_ALLOC (NULL);
- FOR_EACH_SSA_TREE_OPERAND (op, stmt, it, SSA_OP_VIRTUAL_USES)
- {
- bitmap_set_bit (vops, DECL_UID (SSA_NAME_VAR (op)));
+ DR_PTR_INFO (dr) = SSA_NAME_PTR_INFO (addr);
}
-
- DR_VOPS (dr) = vops;
}
/* Returns true if the address of DR is invariant. */
void
free_data_ref (data_reference_p dr)
{
- BITMAP_FREE (DR_VOPS (dr));
VEC_free (tree, heap, DR_ACCESS_FNS (dr));
free (dr);
}
print_generic_expr (dump_file, DR_ALIGNED_TO (dr), TDF_SLIM);
fprintf (dump_file, "\n\tbase_object: ");
print_generic_expr (dump_file, DR_BASE_OBJECT (dr), TDF_SLIM);
- fprintf (dump_file, "\n\tsymbol tag: ");
- print_generic_expr (dump_file, DR_SYMBOL_TAG (dr), TDF_SLIM);
fprintf (dump_file, "\n");
}
const_tree type_a, type_b;
const_tree decl_a = NULL_TREE, decl_b = NULL_TREE;
- /* If the sets of virtual operands are disjoint, the memory references do not
- alias. */
- if (!bitmap_intersect_p (DR_VOPS (a), DR_VOPS (b)))
- return false;
-
/* If the accessed objects are disjoint, the memory references do not
alias. */
if (disjoint_objects_p (DR_BASE_OBJECT (a), DR_BASE_OBJECT (b)))
return false;
+ /* Query the alias oracle. */
+ if (!refs_may_alias_p (DR_REF (a), DR_REF (b)))
+ return false;
+
if (!addr_a || !addr_b)
return true;
- /* If the references are based on different static objects, they cannot alias
- (PTA should be able to disambiguate such accesses, but often it fails to,
- since currently we cannot distinguish between pointer and offset in pointer
- arithmetics). */
+ /* If the references are based on different static objects, they cannot
+ alias (PTA should be able to disambiguate such accesses, but often
+ it fails to). */
if (TREE_CODE (addr_a) == ADDR_EXPR
&& TREE_CODE (addr_b) == ADDR_EXPR)
return TREE_OPERAND (addr_a, 0) == TREE_OPERAND (addr_b, 0);
return chrec_convert (chrec_type (chrec), op, NULL);
}
+ case BIT_NOT_EXPR:
+ {
+ /* Handle ~X as -1 - X. */
+ tree op = initialize_matrix_A (A, TREE_OPERAND (chrec, 0), index, mult);
+ return chrec_fold_op (MINUS_EXPR, chrec_type (chrec),
+ build_int_cst (TREE_TYPE (chrec), -1), op);
+ }
+
case INTEGER_CST:
return chrec;
/* If the overlap occurs outside of the bounds of the
loop, there is no dependence. */
- if (x1 > niter || y1 > niter)
+ if (x1 >= niter || y1 >= niter)
{
*overlaps_a = conflict_fn_no_dependence ();
*overlaps_b = conflict_fn_no_dependence ();
stmt_simple_memref_p (struct loop *loop, gimple stmt, tree op)
{
data_reference_p dr;
+ bool res = true;
dr = create_data_ref (loop, op, stmt, true);
if (!access_functions_are_affine_or_constant_p (dr, loop))
- return false;
+ res = false;
free_data_ref (dr);
- return true;
+ return res;
}
/* Initializes an equation for an OMEGA problem using the information
&& gimple_asm_volatile_p (stmt)))
clobbers_memory = true;
- if (ZERO_SSA_OPERANDS (stmt, SSA_OP_ALL_VIRTUALS))
+ if (!gimple_vuse (stmt))
return clobbers_memory;
if (stmt_code == GIMPLE_ASSIGN)
{
unsigned nb_top_relations = 0;
unsigned nb_bot_relations = 0;
- unsigned nb_basename_differ = 0;
unsigned nb_chrec_relations = 0;
struct data_dependence_relation *ddr;
nb_top_relations++;
else if (DDR_ARE_DEPENDENT (ddr) == chrec_known)
- {
- struct data_reference *a = DDR_A (ddr);
- struct data_reference *b = DDR_B (ddr);
-
- if (!bitmap_intersect_p (DR_VOPS (a), DR_VOPS (b)))
- nb_basename_differ++;
- else
- nb_bot_relations++;
- }
+ nb_bot_relations++;
else
nb_chrec_relations++;
gimple_stmt_iterator bsi;
for (bsi = gsi_start_bb (bb); !gsi_end_p (bsi); gsi_next (&bsi))
- if (!ZERO_SSA_OPERANDS (gsi_stmt (bsi), SSA_OP_VDEF))
+ if (gimple_vdef (gsi_stmt (bsi)))
VEC_safe_push (gimple, heap, *stmts, gsi_stmt (bsi));
}
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