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Fix constant args used with function ports split across declarations

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This commit is contained in:
Zachary Snow 2020-08-29 13:31:02 -04:00
parent 082cbcb4c7
commit ecc5c23b4d
2 changed files with 24 additions and 3 deletions
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7
frontends/ast/simplify.cc
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@ -3211,14 +3211,15 @@ skip_dynamic_range_lvalue_expansion:;
if (wire_cache.count(child->str))
{
wire = wire_cache.at(child->str);
if (wire->children.empty()) {
bool contains_value = wire->type == AST_LOCALPARAM;
if (wire->children.size() == contains_value) {
for (auto c : child->children)
wire->children.push_back(c->clone());
} else if (!child->children.empty()) {
while (child->simplify(true, false, false, stage, -1, false, false)) { }
if (GetSize(child->children) == GetSize(wire->children)) {
if (GetSize(child->children) == GetSize(wire->children) - contains_value) {
for (int i = 0; i < GetSize(child->children); i++)
if (*child->children.at(i) != *wire->children.at(i))
if (*child->children.at(i) != *wire->children.at(i + contains_value))
goto tcall_incompatible_wires;
} else {
tcall_incompatible_wires:

20
tests/various/const_arg_loop.v
View file

@ -23,6 +23,22 @@ module top;
end
endfunction
function automatic [31:0] operation3;
input [4:0] rounds;
input integer num;
reg [4:0] rounds;
integer i;
begin
begin : shadow
integer rounds;
rounds = 0;
end
for (i = 0; i < rounds; i = i + 1)
num = num * 2;
operation3 = num;
end
endfunction
wire [31:0] a;
assign a = 2;
@ -34,11 +50,15 @@ module top;
wire [31:0] x2;
assign x2 = operation2(A, a);
wire [31:0] x3;
assign x3 = operation3(A, a);
// `define VERIFY
`ifdef VERIFY
assert property (a == 2);
assert property (A == 3);
assert property (x1 == 16);
assert property (x2 == 4);
assert property (x3 == 16);
`endif
endmodule