begin implementing if expressions

registers are used over block boundaries though, which doesn't work very
well so i turned off register freeing to make it look like it works
(unless you create more than 12 values total)

1 files changed, 15 insertions, 10 deletions

diff --git a/src/main.zig b/src/main.zig
index 7af0885..48637c2 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -38,11 +38,13 @@ pub fn main() !void {
 
     const source =
         \\{
-        \\    let x = 69
-        \\    {
-        \\        # let x = read_int(0)
-        \\        print(18446744073709551615)
-        \\        print(x + x)
+        \\    let x = 10
+        \\    if x {
+        \\        let x = read_int(0)
+        \\        # print(18446744073709551615)
+        \\        # print(x + x)
+        \\    } else {
+        \\        print(10)
         \\    }
         \\    print(x)
         \\}
@@ -60,13 +62,16 @@ pub fn main() !void {
     if (lexer.peek().type != .eof) {
         std.debug.print("Unexpected token {}, expected end of file\n", .{lexer.next()});
     }
-    const block = try compile.compile(allocator, source, ast);
+    const procedure = try compile.compile(allocator, source, ast);
     std.debug.print("Bytecode instructions:\n", .{});
-    for (block.instrs) |instr| {
-        std.debug.print("    {}\n", .{instr});
+    for (procedure.blocks, 0..) |block, i| {
+        std.debug.print("  ${}:\n", .{i});
+        for (block.instrs.items) |instr| {
+            std.debug.print("    {}\n", .{instr});
+        }
     }
-    std.debug.print("Last use of each virtual register: {}\n", .{fmtHashMap(block.vreg_last_use)});
-    const elf = try codegen.create_elf(allocator, block);
+    // std.debug.print("Last use of each virtual register: {}\n", .{fmtHashMap(block.vreg_last_use)});
+    const elf = try codegen.create_elf(allocator, procedure);
     try output.writeAll(elf);
     std.debug.print("Run output:\n", .{});
     if (run) {