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Check all generate expressions for failure. 

This patch adds code to check that the various generate expressions
evaluate correctly.
This commit is contained in:
Cary R 2008-08-06 15:46:43 -07:00 committed by Stephen Williams
parent e719dc250a
commit d43452f88d
1 changed files with 24 additions and 4 deletions
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28
elab_scope.cc
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@ -475,7 +475,12 @@ bool PGenerate::generate_scope_loop_(Design*des, NetScope*container)
container->genvar_tmp_val = genvar;
NetExpr*test_ex = elab_and_eval(des, container, loop_test, -1);
NetEConst*test = dynamic_cast<NetEConst*>(test_ex);
assert(test);
if (test == 0) {
cerr << get_fileline() << ": error: Cannot evaluate genvar"
<< " conditional expression: " << *loop_test << endl;
des->errors += 1;
return false;
}
while (test->value().as_long()) {
// The actual name of the scope includes the genvar so
@ -522,7 +527,12 @@ bool PGenerate::generate_scope_loop_(Design*des, NetScope*container)
// Calculate the step for the loop variable.
NetExpr*step_ex = elab_and_eval(des, container, loop_step, -1);
NetEConst*step = dynamic_cast<NetEConst*>(step_ex);
assert(step);
if (step == 0) {
cerr << get_fileline() << ": error: Cannot evaluate genvar"
<< " step expression: " << *loop_step << endl;
des->errors += 1;
return false;
}
if (debug_scopes)
cerr << get_fileline() << ": debug: genvar step from "
<< genvar << " to " << step->value().as_long() << endl;
@ -547,7 +557,12 @@ bool PGenerate::generate_scope_condit_(Design*des, NetScope*container, bool else
{
NetExpr*test_ex = elab_and_eval(des, container, loop_test, -1);
NetEConst*test = dynamic_cast<NetEConst*> (test_ex);
assert(test);
if (test == 0) {
cerr << get_fileline() << ": error: Cannot evaluate genvar"
<< " conditional expression: " << *loop_test << endl;
des->errors += 1;
return false;
}
// If the condition evaluates as false, then do not create the
// scope.
@ -589,7 +604,12 @@ bool PGenerate::generate_scope_case_(Design*des, NetScope*container)
{
NetExpr*case_value_ex = elab_and_eval(des, container, loop_test, -1);
NetEConst*case_value_co = dynamic_cast<NetEConst*>(case_value_ex);
assert(case_value_co);
if (case_value_co == 0) {
cerr << get_fileline() << ": error: Cannot evaluate genvar case"
<< " expression: " << *loop_test << endl;
des->errors += 1;
return false;
}
// The name of the scope to generate, whatever that item is.
hname_t use_name (scope_name);