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b93b6f4285
Elaboration now attempts constant evaluation of any function call with only constant arguments, regardless of the context or contents of the function. This removes the concept of "recommended constant evaluation" which previously applied to functions with `for` loops or which were (sometimes erroneously) identified as recursive. Any function call in a constant context (e.g., `localparam`) or which contains a constant-only procedural construct (`while` or `repeat`) in its body will fail as before if constant evaluation does not succeed.
34 lines
616 B
Verilog
34 lines
616 B
Verilog
module top(w, x, y, z);
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function [11:0] func;
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input reg [2:0] x;
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input reg [2:0] y;
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begin
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x = x * (y + 1);
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begin : foo
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reg [2:0] y;
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y = x + 1;
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begin : bar
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reg [2:0] x;
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x = y + 1;
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begin : blah
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reg [2:0] y;
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y = x + 1;
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func[2:0] = y;
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end
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func[5:3] = x;
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end
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func[8:6] = y;
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end
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func[11:9] = x;
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end
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endfunction
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output wire [func(2, 3) - 1:0] w;
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output wire [func(1, 3) - 1:0] x;
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output wire [func(3, 1) - 1:0] y;
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output wire [func(5, 2) - 1:0] z;
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assign w = 1'sb1;
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assign x = 1'sb1;
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assign y = 1'sb1;
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assign z = 1'sb1;
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endmodule
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