Support for data and array queries on struct/union item expressions

For now, $bits, $left, $right, $low, $high, and $size are supported.

tests/svtypes/struct_sizebits.sv

@@ -0,0 +1,107 @@
+// These tests are adapted from tests/sat/sizebits.sv
+
+module top;
+
+typedef struct packed {
+	logic [2:7][3:0] y;
+} sy_t;
+
+struct packed {
+	logic t;
+	logic [5:2] x;
+	sy_t sy;
+	union packed {
+		logic [7:2][2:9][1:4] z;
+		logic [1:6*8*4] z2;
+	} sz;
+} s;
+
+//wire [$size(s.x)-1:0]x_size;
+//wire [$size({s.x, s.x})-1:0]xx_size;
+//wire [$size(s.sy.y)-1:0]y_size;
+//wire [$size(s.sz.z)-1:0]z_size;
+
+assert property ($size(s) == $size(s.t) + $size(s.x) + $size(s.sy) + $size(s.sz));
+assert property ($size(s) == 1 + 4 + 6*4 + 6*8*4);
+
+assert property ($size(t) == 1);
+assert property ($size(s.x) == 4);
+assert property ($size({3{s.x}}) == 3*4);
+assert property ($size(s.sy.y) == 6);
+assert property ($size(s.sy.y, 1) == 6);
+assert property ($size(s.sy.y, (1+1)) == 4);
+assert property ($size(s.sy.y[2], 1) == 4);
+// This is unsupported at the moment
+//assert property ($size(s.sy.y[2][1], 1) == 1);
+
+assert property ($size(s.sz.z) == 6);
+assert property ($size(s.sz.z, 1) == 6);
+assert property ($size(s.sz.z, 2) == 8);
+assert property ($size(s.sz.z, 3) == 4);
+assert property ($size(s.sz.z[3], 1) == 8);
+assert property ($size(s.sz.z[3][3], 1) == 4);
+// This is unsupported at the moment
+//assert property ($size(s.sz.z[3][3][3], 1) == 1);
+// This should trigger an error if enabled (it does).
+//assert property ($size(s.sz.z, 4) == 4);
+
+//wire [$bits(s.x)-1:0]x_bits;
+//wire [$bits({s.x, s.x})-1:0]xx_bits;
+
+assert property ($bits(t) == 1);
+assert property ($bits(s.x) == 4);
+assert property ($bits(s.sy.y) == 4*6);
+assert property ($bits(s.sz.z) == 4*6*8);
+
+assert property ($high(s.x) == 5);
+assert property ($high(s.sy.y) == 7);
+assert property ($high(s.sy.y, 1) == 7);
+assert property ($high(s.sy.y, (1+1)) == 3);
+
+assert property ($high(s.sz.z) == 7);
+assert property ($high(s.sz.z, 1) == 7);
+assert property ($high(s.sz.z, 2) == 9);
+assert property ($high(s.sz.z, 3) == 4);
+assert property ($high(s.sz.z[3]) == 9);
+assert property ($high(s.sz.z[3][3]) == 4);
+assert property ($high(s.sz.z[3], 2) == 4);
+
+assert property ($low(s.x) == 2);
+assert property ($low(s.sy.y) == 2);
+assert property ($low(s.sy.y, 1) == 2);
+assert property ($low(s.sy.y, (1+1)) == 0);
+
+assert property ($low(s.sz.z) == 2);
+assert property ($low(s.sz.z, 1) == 2);
+assert property ($low(s.sz.z, 2) == 2);
+assert property ($low(s.sz.z, 3) == 1);
+assert property ($low(s.sz.z[3]) == 2);
+assert property ($low(s.sz.z[3][3]) == 1);
+assert property ($low(s.sz.z[3], 2) == 1);
+
+assert property ($left(s.x) == 5);
+assert property ($left(s.sy.y) == 2);
+assert property ($left(s.sy.y, 1) == 2);
+assert property ($left(s.sy.y, (1+1)) == 3);
+
+assert property ($left(s.sz.z) == 7);
+assert property ($left(s.sz.z, 1) == 7);
+assert property ($left(s.sz.z, 2) == 2);
+assert property ($left(s.sz.z, 3) == 1);
+assert property ($left(s.sz.z[3]) == 2);
+assert property ($left(s.sz.z[3][3]) == 1);
+assert property ($left(s.sz.z[3], 2) == 1);
+
+assert property ($right(s.x) == 2);
+assert property ($right(s.sy.y) == 7);
+assert property ($right(s.sy.y, 1) == 7);
+assert property ($right(s.sy.y, (1+1)) == 0);
+
+assert property ($right(s.sz.z) == 2);
+assert property ($right(s.sz.z, 1) == 2);
+assert property ($right(s.sz.z, 2) == 9);
+assert property ($right(s.sz.z, 3) == 4);
+assert property ($right(s.sz.z[3]) == 9);
+assert property ($right(s.sz.z[3][3]) == 4);
+assert property ($right(s.sz.z[3], 2) == 4);
+endmodule