diff options
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 8 | ||||
| -rw-r--r-- | gcc/tree-complex.c | 84 |
2 files changed, 64 insertions, 28 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index b18b1e4..a7d4228 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,11 @@ +2005-06-12 Richard Henderson <rth@redhat.com> + + PR tree-opt/21994 + * tree-complex.c (update_complex_components_on_edge): New. + (update_parameter_components): Use it. + (update_phi_components): Likewise. + (expand_complex_move): Likewise for is_ctrl_altering_stmt. + 2005-06-12 James A. Morrison <phython@gcc.gnu.org> PR tree-optimization/14796 diff --git a/gcc/tree-complex.c b/gcc/tree-complex.c index e3e6741..1fa76a9 100644 --- a/gcc/tree-complex.c +++ b/gcc/tree-complex.c @@ -441,6 +441,31 @@ update_complex_components (block_stmt_iterator *bsi, tree stmt, tree r, tree i) bsi_insert_after (bsi, x, BSI_NEW_STMT); } +static void +update_complex_components_on_edge (edge e, tree stmt, tree lhs, tree r, tree i) +{ + unsigned int uid = var_ann (SSA_NAME_VAR (lhs))->uid; + tree v, x; + + v = VEC_index (tree, complex_variable_components, 2*uid); + x = build2 (MODIFY_EXPR, TREE_TYPE (v), v, r); + if (stmt) + { + SET_EXPR_LOCUS (x, EXPR_LOCUS (stmt)); + TREE_BLOCK (x) = TREE_BLOCK (stmt); + } + bsi_insert_on_edge (e, x); + + v = VEC_index (tree, complex_variable_components, 2*uid + 1); + x = build2 (MODIFY_EXPR, TREE_TYPE (v), v, i); + if (stmt) + { + SET_EXPR_LOCUS (x, EXPR_LOCUS (stmt)); + TREE_BLOCK (x) = TREE_BLOCK (stmt); + } + bsi_insert_on_edge (e, x); +} + /* Update an assignment to a complex variable in place. */ static void @@ -472,23 +497,17 @@ update_parameter_components (void) for (parm = DECL_ARGUMENTS (cfun->decl); parm ; parm = TREE_CHAIN (parm)) { tree type = TREE_TYPE (parm); - tree ssa_name, x, y; - unsigned int uid; + tree ssa_name, r, i; if (TREE_CODE (type) != COMPLEX_TYPE || !is_gimple_reg (parm)) continue; type = TREE_TYPE (type); ssa_name = default_def (parm); - uid = var_ann (parm)->uid; - - x = VEC_index (tree, complex_variable_components, 2*uid); - y = build1 (REALPART_EXPR, type, ssa_name); - bsi_insert_on_edge (entry_edge, build2 (MODIFY_EXPR, type, x, y)); - x = VEC_index (tree, complex_variable_components, 2*uid + 1); - y = build1 (IMAGPART_EXPR, type, ssa_name); - bsi_insert_on_edge (entry_edge, build2 (MODIFY_EXPR, type, x, y)); + r = build1 (REALPART_EXPR, type, ssa_name); + i = build1 (IMAGPART_EXPR, type, ssa_name); + update_complex_components_on_edge (entry_edge, NULL, ssa_name, r, i); } } @@ -503,27 +522,18 @@ update_phi_components (basic_block bb) for (phi = phi_nodes (bb); phi; phi = PHI_CHAIN (phi)) if (is_complex_reg (PHI_RESULT (phi))) { - unsigned int i, n, uid; - tree real, imag, type; - - uid = var_ann (SSA_NAME_VAR (PHI_RESULT (phi)))->uid; - real = VEC_index (tree, complex_variable_components, 2*uid); - imag = VEC_index (tree, complex_variable_components, 2*uid + 1); - type = TREE_TYPE (real); + unsigned int i, n; + tree lhs = PHI_RESULT (phi); for (i = 0, n = PHI_NUM_ARGS (phi); i < n; ++i) { edge e = PHI_ARG_EDGE (phi, i); tree arg = PHI_ARG_DEF (phi, i); - tree x; + tree r, i; - x = extract_component (NULL, arg, 0, false); - if (real != x) - bsi_insert_on_edge (e, build2 (MODIFY_EXPR, type, real, x)); - - x = extract_component (NULL, arg, 1, false); - if (imag != x) - bsi_insert_on_edge (e, build2 (MODIFY_EXPR, type, imag, x)); + r = extract_component (NULL, arg, 0, false); + i = extract_component (NULL, arg, 1, false); + update_complex_components_on_edge (e, NULL, lhs, r, i); } } } @@ -555,10 +565,28 @@ expand_complex_move (block_stmt_iterator *bsi, tree stmt, tree type, if (TREE_CODE (lhs) == SSA_NAME) { - if (TREE_CODE (rhs) == CALL_EXPR || TREE_SIDE_EFFECTS (rhs)) + if (is_ctrl_altering_stmt (bsi_stmt (*bsi))) + { + edge_iterator ei; + edge e; + + /* The value is not assigned on the exception edges, so we need not + concern ourselves there. We do need to update on the fallthru + edge. Find it. */ + FOR_EACH_EDGE (e, ei, bsi->bb->succs) + if (e->flags & EDGE_FALLTHRU) + goto found_fallthru; + gcc_unreachable (); + found_fallthru: + + r = build1 (REALPART_EXPR, inner_type, lhs); + i = build1 (IMAGPART_EXPR, inner_type, lhs); + update_complex_components_on_edge (e, stmt, lhs, r, i); + } + else if (TREE_CODE (rhs) == CALL_EXPR || TREE_SIDE_EFFECTS (rhs)) { - r = build1 (REALPART_EXPR, inner_type, unshare_expr (lhs)); - i = build1 (IMAGPART_EXPR, inner_type, unshare_expr (lhs)); + r = build1 (REALPART_EXPR, inner_type, lhs); + i = build1 (IMAGPART_EXPR, inner_type, lhs); update_complex_components (bsi, stmt, r, i); } else |