diff options
Diffstat (limited to 'frontends')
| -rw-r--r-- | frontends/ast/ast.h | 2 | ||||
| -rw-r--r-- | frontends/ast/genrtlil.cc | 10 | ||||
| -rw-r--r-- | frontends/ast/simplify.cc | 27 |
3 files changed, 22 insertions, 17 deletions
diff --git a/frontends/ast/ast.h b/frontends/ast/ast.h index 6c5a0eae..3e69e3bc 100644 --- a/frontends/ast/ast.h +++ b/frontends/ast/ast.h @@ -202,7 +202,7 @@ namespace AST // additional functionality for evaluating constant functions struct varinfo_t { RTLIL::Const val; int offset; bool is_signed; }; - bool has_const_only_constructs(); + bool has_const_only_constructs(bool &recommend_const_eval); void replace_variables(std::map<std::string, varinfo_t> &variables, AstNode *fcall); AstNode *eval_const_function(AstNode *fcall); diff --git a/frontends/ast/genrtlil.cc b/frontends/ast/genrtlil.cc index 2efdee10..9273636f 100644 --- a/frontends/ast/genrtlil.cc +++ b/frontends/ast/genrtlil.cc @@ -623,10 +623,10 @@ void AstNode::detectSignWidthWorker(int &width_hint, bool &sign_hint) if (id_ast->type == AST_AUTOWIRE) this_width = 1; else { - // current_ast_mod->dumpAst(stdout, ""); - // printf("---\n"); - // dumpAst(stdout, ""); - // fflush(stdout); + // current_ast_mod->dumpAst(NULL, "mod> "); + // log("---\n"); + // id_ast->dumpAst(NULL, "decl> "); + // dumpAst(NULL, "ref> "); log_error("Failed to detect with of signal access `%s' at %s:%d!\n", str.c_str(), filename.c_str(), linenum); } } else { @@ -693,7 +693,7 @@ void AstNode::detectSignWidthWorker(int &width_hint, bool &sign_hint) break; case AST_REPLICATE: - while (children[0]->simplify(true, false, false, 1, -1, false, false) == true) { } + while (children[0]->simplify(true, false, false, 1, -1, false, true) == true) { } if (children[0]->type != AST_CONSTANT) log_error("Left operand of replicate expression is not constant at %s:%d!\n", filename.c_str(), linenum); children[1]->detectSignWidthWorker(sub_width_hint, sub_sign_hint); diff --git a/frontends/ast/simplify.cc b/frontends/ast/simplify.cc index 71e7cbc6..8a4d42e1 100644 --- a/frontends/ast/simplify.cc +++ b/frontends/ast/simplify.cc @@ -349,12 +349,12 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage, } if (detect_width_simple && width_hint < 0) { + if (type == AST_REPLICATE) + while (children[0]->simplify(true, false, in_lvalue, stage, -1, false, true) == true) + did_something = true; for (auto child : children) 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) - did_something = true; detectSignWidth(width_hint, sign_hint); } @@ -376,8 +376,9 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage, bool const_fold_here = const_fold, in_lvalue_here = in_lvalue; int width_hint_here = width_hint; bool sign_hint_here = sign_hint; - if (i == 0 && type == AST_REPLICATE) - const_fold_here = true; + bool in_param_here = in_param; + if (i == 0 && (type == AST_REPLICATE || type == AST_WIRE)) + const_fold_here = true, in_param_here = true; if (type == AST_PARAMETER || type == AST_LOCALPARAM) const_fold_here = true; if (i == 0 && (type == AST_ASSIGN || type == AST_ASSIGN_EQ || type == AST_ASSIGN_LE)) @@ -394,7 +395,7 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage, width_hint_here = -1, sign_hint_here = false; if (children_are_self_determined) width_hint_here = -1, sign_hint_here = false; - did_something_here = children[i]->simplify(const_fold_here, at_zero, in_lvalue_here, stage, width_hint_here, sign_hint_here, in_param); + did_something_here = children[i]->simplify(const_fold_here, at_zero, in_lvalue_here, stage, width_hint_here, sign_hint_here, in_param_here); if (did_something_here) did_something = true; } @@ -1187,7 +1188,9 @@ skip_dynamic_range_lvalue_expansion:; log_error("Can't resolve task name `%s' at %s:%d.\n", str.c_str(), filename.c_str(), linenum); } - if (in_param || current_scope[str]->has_const_only_constructs()) + bool recommend_const_eval = false; + bool require_const_eval = in_param ? false : has_const_only_constructs(recommend_const_eval); + if (in_param || recommend_const_eval || require_const_eval) { bool all_args_const = true; for (auto child : children) { @@ -1205,7 +1208,7 @@ skip_dynamic_range_lvalue_expansion:; if (in_param) log_error("Non-constant function call in constant expression at %s:%d.\n", filename.c_str(), linenum); - else + if (require_const_eval) log_error("Function %s can only be called with constant arguments at %s:%d.\n", str.c_str(), filename.c_str(), linenum); } @@ -1828,15 +1831,17 @@ void AstNode::meminfo(int &mem_width, int &mem_size, int &addr_bits) addr_bits++; } -bool AstNode::has_const_only_constructs() +bool AstNode::has_const_only_constructs(bool &recommend_const_eval) { + if (type == AST_FOR) + recommend_const_eval = true; if (type == AST_WHILE || type == AST_REPEAT) return true; if (type == AST_FCALL && current_scope.count(str)) - if (current_scope[str]->has_const_only_constructs()) + if (current_scope[str]->has_const_only_constructs(recommend_const_eval)) return true; for (auto child : children) - if (child->AstNode::has_const_only_constructs()) + if (child->AstNode::has_const_only_constructs(recommend_const_eval)) return true; return false; } |