riscv
/
yosys
mirror of https://github.com/YosysHQ/yosys.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

Be more conservative with new const-function code

This commit is contained in:
Clifford Wolf 2014-02-14 20:45:30 +01:00
parent e8af3def7f
commit 45d2b6ffce
1 changed files with 5 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
frontends/ast/simplify.cc
View File

@ -148,10 +148,14 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage,
// activate const folding if this is anything that must be evaluated statically (ranges, parameters, attributes, etc.) // activate const folding if this is anything that must be evaluated statically (ranges, parameters, attributes, etc.)
if (type == AST_WIRE || type == AST_PARAMETER || type == AST_LOCALPARAM || type == AST_DEFPARAM || type == AST_PARASET || type == AST_RANGE || type == AST_PREFIX) if (type == AST_WIRE || type == AST_PARAMETER || type == AST_LOCALPARAM || type == AST_DEFPARAM || type == AST_PARASET || type == AST_RANGE || type == AST_PREFIX)
const_fold = true, in_param = true; const_fold = true;
if (type == AST_IDENTIFIER && current_scope.count(str) > 0 && (current_scope[str]->type == AST_PARAMETER || current_scope[str]->type == AST_LOCALPARAM)) if (type == AST_IDENTIFIER && current_scope.count(str) > 0 && (current_scope[str]->type == AST_PARAMETER || current_scope[str]->type == AST_LOCALPARAM))
const_fold = true; const_fold = true;
// in certain cases a function must be evaluated constant. this is what in_param controls.
if (type == AST_PARAMETER || type == AST_LOCALPARAM || type == AST_DEFPARAM || type == AST_PARASET || type == AST_PREFIX)
in_param = true;
std::map<std::string, AstNode*> backup_scope; std::map<std::string, AstNode*> backup_scope;
// create name resolution entries for all objects with names // create name resolution entries for all objects with names