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fmt: Allow non-constant $display calls in initial blocks

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These are useful for formal verification with SBY where they can be used
to display solver chosen `rand const reg` signals and signals derived
from those.

The previous error message for non-constant initial $display statements
is downgraded to a log message. Constant initial $display statements
will be shown both during elaboration and become part of the RTLIL so
that the `sim` output is complete.
This commit is contained in:
Jannis Harder 2023-09-22 17:56:34 +02:00 • committed by Dag Lem
parent 57b4e16acd
commit 510d137996
2 changed files with 9 additions and 3 deletions
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2
frontends/ast/ast.h
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@ -287,7 +287,7 @@ namespace AST
bool is_simple_const_expr();
// helper for parsing format strings
Fmt processFormat(int stage, bool sformat_like, int default_base = 10, size_t first_arg_at = 0);
Fmt processFormat(int stage, bool sformat_like, int default_base = 10, size_t first_arg_at = 0, bool may_fail = false);
bool is_recursive_function() const;
std::pair<AstNode*, AstNode*> get_tern_choice();