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-rw-r--r--frontends/ast/ast.h2
-rw-r--r--frontends/ast/simplify.cc123
2 files changed, 83 insertions, 42 deletions
diff --git a/frontends/ast/ast.h b/frontends/ast/ast.h
index 9a5aa15f9..203b50021 100644
--- a/frontends/ast/ast.h
+++ b/frontends/ast/ast.h
@@ -250,7 +250,7 @@ namespace AST
// it also sets the id2ast pointers so that identifier lookups are fast in genRTLIL()
bool simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage, int width_hint, bool sign_hint, bool in_param);
AstNode *readmem(bool is_readmemh, std::string mem_filename, AstNode *memory, int start_addr, int finish_addr, bool unconditional_init);
- void expand_genblock(std::string index_var, std::string prefix, std::map<std::string, std::string> &name_map);
+ void expand_genblock(std::string index_var, std::string prefix, std::map<std::string, std::string> &name_map, bool original_scope = true);
void replace_ids(const std::string &prefix, const std::map<std::string, std::string> &rules);
void mem2reg_as_needed_pass1(dict<AstNode*, pool<std::string>> &mem2reg_places,
dict<AstNode*, uint32_t> &mem2reg_flags, dict<AstNode*, uint32_t> &proc_flags, uint32_t &status_flags);
diff --git a/frontends/ast/simplify.cc b/frontends/ast/simplify.cc
index 6ab369817..5ed5e7647 100644
--- a/frontends/ast/simplify.cc
+++ b/frontends/ast/simplify.cc
@@ -3711,8 +3711,11 @@ AstNode *AstNode::readmem(bool is_readmemh, std::string mem_filename, AstNode *m
}
// annotate the names of all wires and other named objects in a generate block
-void AstNode::expand_genblock(std::string index_var, std::string prefix, std::map<std::string, std::string> &name_map)
+void AstNode::expand_genblock(std::string index_var, std::string prefix, std::map<std::string, std::string> &name_map, bool original_scope)
{
+ // `original_scope` defaults to false, and is used to prevent the premature
+ // prefixing of items in named sub-blocks
+
if (!index_var.empty() && type == AST_IDENTIFIER && str == index_var) {
if (children.empty()) {
current_scope[index_var]->children[0]->cloneInto(this);
@@ -3725,53 +3728,85 @@ void AstNode::expand_genblock(std::string index_var, std::string prefix, std::ma
}
}
- if ((type == AST_IDENTIFIER || type == AST_FCALL || type == AST_TCALL || type == AST_WIRETYPE) && name_map.count(str) > 0)
- str = name_map[str];
+ if (type == AST_IDENTIFIER || type == AST_FCALL || type == AST_TCALL || type == AST_WIRETYPE) {
+ if (name_map.count(str) > 0) {
+ str = name_map[str];
+ } else {
+ // remap the prefix of this ident if it is a local generate scope
+ size_t pos = str.rfind('.');
+ if (pos != std::string::npos) {
+ std::string existing_prefix = str.substr(0, pos);
+ if (name_map.count(existing_prefix) > 0) {
+ str = name_map[existing_prefix] + str.substr(pos);
+ }
+ }
+ }
+ }
std::map<std::string, std::string> backup_name_map;
+ auto prefix_node = [&](AstNode* child) {
+ if (backup_name_map.size() == 0)
+ backup_name_map = name_map;
+
+ // if within a nested scope
+ if (!original_scope) {
+ // this declaration shadows anything in the parent scope(s)
+ name_map[child->str] = child->str;
+ return;
+ }
+
+ std::string new_name = prefix[0] == '\\' ? prefix.substr(1) : prefix;
+ size_t pos = child->str.rfind('.');
+ if (pos == std::string::npos)
+ pos = child->str[0] == '\\' && prefix[0] == '\\' ? 1 : 0;
+ else
+ pos = pos + 1;
+ new_name = child->str.substr(0, pos) + new_name + child->str.substr(pos);
+ if (new_name[0] != '$' && new_name[0] != '\\')
+ new_name = prefix[0] + new_name;
+
+ name_map[child->str] = new_name;
+ if (child->type == AST_FUNCTION)
+ replace_result_wire_name_in_function(child, child->str, new_name);
+ else
+ child->str = new_name;
+ current_scope[new_name] = child;
+ };
+
for (size_t i = 0; i < children.size(); i++) {
AstNode *child = children[i];
- if (child->type == AST_WIRE || child->type == AST_MEMORY || child->type == AST_PARAMETER || child->type == AST_LOCALPARAM ||
- child->type == AST_FUNCTION || child->type == AST_TASK || child->type == AST_CELL || child->type == AST_TYPEDEF || child->type == AST_ENUM_ITEM) {
- if (backup_name_map.size() == 0)
- backup_name_map = name_map;
- std::string new_name = prefix[0] == '\\' ? prefix.substr(1) : prefix;
- size_t pos = child->str.rfind('.');
- if (pos == std::string::npos)
- pos = child->str[0] == '\\' && prefix[0] == '\\' ? 1 : 0;
- else
- pos = pos + 1;
- new_name = child->str.substr(0, pos) + new_name + child->str.substr(pos);
- if (new_name[0] != '$' && new_name[0] != '\\')
- new_name = prefix[0] + new_name;
- name_map[child->str] = new_name;
- if (child->type == AST_FUNCTION)
- replace_result_wire_name_in_function(child, child->str, new_name);
- else
- child->str = new_name;
- current_scope[new_name] = child;
- }
- if (child->type == AST_ENUM){
+
+ switch (child->type) {
+ case AST_WIRE:
+ case AST_MEMORY:
+ case AST_PARAMETER:
+ case AST_LOCALPARAM:
+ case AST_FUNCTION:
+ case AST_TASK:
+ case AST_CELL:
+ case AST_TYPEDEF:
+ case AST_ENUM_ITEM:
+ case AST_GENVAR:
+ prefix_node(child);
+ break;
+
+ case AST_BLOCK:
+ case AST_GENBLOCK:
+ if (!child->str.empty())
+ prefix_node(child);
+ break;
+
+ case AST_ENUM:
current_scope[child->str] = child;
for (auto enode : child->children){
log_assert(enode->type == AST_ENUM_ITEM);
- if (backup_name_map.size() == 0)
- backup_name_map = name_map;
- std::string new_name = prefix[0] == '\\' ? prefix.substr(1) : prefix;
- size_t pos = enode->str.rfind('.');
- if (pos == std::string::npos)
- pos = enode->str[0] == '\\' && prefix[0] == '\\' ? 1 : 0;
- else
- pos = pos + 1;
- new_name = enode->str.substr(0, pos) + new_name + enode->str.substr(pos);
- if (new_name[0] != '$' && new_name[0] != '\\')
- new_name = prefix[0] + new_name;
- name_map[enode->str] = new_name;
-
- enode->str = new_name;
- current_scope[new_name] = enode;
+ prefix_node(enode);
}
+ break;
+
+ default:
+ break;
}
}
@@ -3781,8 +3816,14 @@ void AstNode::expand_genblock(std::string index_var, std::string prefix, std::ma
// still needs to recursed-into
if (type == AST_PREFIX && i == 1 && child->type == AST_IDENTIFIER)
continue;
- if (child->type != AST_FUNCTION && child->type != AST_TASK)
- child->expand_genblock(index_var, prefix, name_map);
+ // functions/tasks may reference wires, constants, etc. in this scope
+ if (child->type == AST_FUNCTION || child->type == AST_TASK)
+ child->expand_genblock(index_var, prefix, name_map, false);
+ // continue prefixing if this child block is anonymous
+ else if (child->type == AST_GENBLOCK || child->type == AST_BLOCK)
+ child->expand_genblock(index_var, prefix, name_map, original_scope && child->str.empty());
+ else
+ child->expand_genblock(index_var, prefix, name_map, original_scope);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-10-30 11:39:35 +0000