Consolidate "Blocking assignment to memory.." msgs for the same line

diff --git a/frontends/ast/simplify.cc b/frontends/ast/simplify.cc
index 2ce2d57dca1bdfa4a36c09abb95d3481f9b403a5..5ab778e6698b64c16cf6fe8eb63e2f21163774a9 100644 (file)
--- a/frontends/ast/simplify.cc
+++ b/frontends/ast/simplify.cc
@@ -51,6 +51,7 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage,
 {
        AstNode *newNode = NULL;
        bool did_something = false;
+       static pair<string, int> last_blocking_assignment_warn;
 
 #if 0
        log("-------------\n");
@@ -62,6 +63,7 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage,
        if (stage == 0)
        {
                log_assert(type == AST_MODULE);
+               last_blocking_assignment_warn = pair<string, int>();
 
                while (simplify(const_fold, at_zero, in_lvalue, 1, width_hint, sign_hint, in_param)) { }
 
@@ -1259,9 +1261,13 @@ skip_dynamic_range_lvalue_expansion:;
                sstr << "$memwr$" << children[0]->str << "$" << filename << ":" << linenum << "$" << (autoidx++);
                std::string id_addr = sstr.str() + "_ADDR", id_data = sstr.str() + "_DATA", id_en = sstr.str() + "_EN";
 
-               if (type == AST_ASSIGN_EQ)
-                       log_warning("Blocking assignment to memory in line %s:%d is handled like a non-blocking assignment.\n",
-                                       filename.c_str(), linenum);
+               if (type == AST_ASSIGN_EQ) {
+                       pair<string, int> this_blocking_assignment_warn(filename, linenum);
+                       if (this_blocking_assignment_warn != last_blocking_assignment_warn)
+                               log_warning("Blocking assignment to memory in line %s:%d is handled like a non-blocking assignment.\n",
+                                               filename.c_str(), linenum);
+                       last_blocking_assignment_warn = this_blocking_assignment_warn;
+               }
 
                int mem_width, mem_size, addr_bits;
                children[0]->id2ast->meminfo(mem_width, mem_size, addr_bits);