diff options
Diffstat (limited to 'frontends/ast')
| -rw-r--r-- | frontends/ast/simplify.cc | 32 |
1 files changed, 22 insertions, 10 deletions
diff --git a/frontends/ast/simplify.cc b/frontends/ast/simplify.cc index 55ed28b0..72d90e4a 100644 --- a/frontends/ast/simplify.cc +++ b/frontends/ast/simplify.cc @@ -219,7 +219,8 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage, for (size_t i = 0; i < children.size(); i++) { AstNode *node = children[i]; if (node->type == AST_PARAMETER || node->type == AST_LOCALPARAM || node->type == AST_WIRE || node->type == AST_AUTOWIRE) - while (node->simplify(true, false, false, 1, -1, false, node->type == AST_PARAMETER || node->type == AST_LOCALPARAM)) { } + while (node->simplify(true, false, false, 1, -1, false, node->type == AST_PARAMETER || node->type == AST_LOCALPARAM)) + did_something = true; } } @@ -241,8 +242,10 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage, case AST_ASSIGN_EQ: case AST_ASSIGN_LE: case AST_ASSIGN: - while (!children[0]->basic_prep && children[0]->simplify(false, false, true, stage, -1, false, false) == true) { } - while (!children[1]->basic_prep && children[1]->simplify(false, false, false, stage, -1, false, false) == true) { } + while (!children[0]->basic_prep && children[0]->simplify(false, false, true, stage, -1, false, false) == true) + did_something = true; + while (!children[1]->basic_prep && children[1]->simplify(false, false, false, stage, -1, false, false) == true) + did_something = true; children[0]->detectSignWidth(backup_width_hint, backup_sign_hint); children[1]->detectSignWidth(width_hint, sign_hint); width_hint = std::max(width_hint, backup_width_hint); @@ -251,11 +254,13 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage, case AST_PARAMETER: case AST_LOCALPARAM: - while (!children[0]->basic_prep && children[0]->simplify(false, false, false, stage, -1, false, true) == true) { } + while (!children[0]->basic_prep && children[0]->simplify(false, false, false, stage, -1, false, true) == true) + did_something = true; children[0]->detectSignWidth(width_hint, sign_hint); if (children.size() > 1) { assert(children[1]->type == AST_RANGE); - while (!children[1]->basic_prep && children[1]->simplify(false, false, false, stage, -1, false, true) == true) { } + while (!children[1]->basic_prep && children[1]->simplify(false, false, false, stage, -1, false, true) == true) + did_something = true; if (!children[1]->range_valid) log_error("Non-constant width range on parameter decl at %s:%d.\n", filename.c_str(), linenum); width_hint = std::max(width_hint, children[1]->range_left - children[1]->range_right + 1); @@ -311,7 +316,8 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage, width_hint = -1; sign_hint = true; for (auto child : children) { - while (!child->basic_prep && child->simplify(false, false, in_lvalue, stage, -1, false, in_param) == true) { } + while (!child->basic_prep && child->simplify(false, false, in_lvalue, stage, -1, false, in_param) == true) + did_something = true; child->detectSignWidthWorker(width_hint, sign_hint); } reset_width_after_children = true; @@ -341,9 +347,11 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage, if (detect_width_simple && width_hint < 0) { for (auto child : children) - while (!child->basic_prep && child->simplify(false, false, in_lvalue, stage, -1, false, in_param) == true) { } + while (!child->basic_prep && child->simplify(false, false, in_lvalue, stage, -1, false, in_param) == true) + did_something = true; if (type == AST_REPLICATE) - while (children[0]->simplify(true, false, in_lvalue, stage, -1, false, in_param) == true) { } + while (children[0]->simplify(true, false, in_lvalue, stage, -1, false, in_param) == true) + did_something = true; detectSignWidth(width_hint, sign_hint); } @@ -389,7 +397,8 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage, } } for (auto &attr : attributes) { - while (attr.second->simplify(true, false, false, stage, -1, false, true)) { } + while (attr.second->simplify(true, false, false, stage, -1, false, true)) + did_something = true; } if (reset_width_after_children) { @@ -539,7 +548,10 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage, current_scope[str] = auto_wire; did_something = true; } - id2ast = current_scope[str]; + if (id2ast != current_scope[str]) { + id2ast = current_scope[str]; + did_something = true; + } } // split memory access with bit select to individual statements |