From 46e1f128fd310bd29a2b4335b36c60d6cc0aa3a7 Mon Sep 17 00:00:00 2001
From: lemon <lsof@mailbox.org>
Date: Sat, 20 Aug 2022 11:06:38 +0200
Subject: initial work on IR

---
 src/irdump.cff | 119 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 119 insertions(+)
 create mode 100644 src/irdump.cff

(limited to 'src/irdump.cff')

diff --git a/src/irdump.cff b/src/irdump.cff
new file mode 100644
index 0000000..4147c8a
--- /dev/null
+++ b/src/irdump.cff
@@ -0,0 +1,119 @@
+import "ir.hff";
+import "common.hff";
+
+fn dump(fmt *const u8, ...) void {
+   let ap va_list #?;
+   ap->start(fmt);
+   for let c = *fmt; c != 0; c = *++fmt {
+      if c != '%' {
+         fputc(c, stderr);
+         continue;
+      }
+      switch (c = *++fmt) {
+      case '%';
+         fputc('%', stderr);
+      case 'd';
+         efmt("%d", ap->arg(int));         
+      case 'a';
+         let arg = ap->arg(IRArg);
+         switch arg {
+         case Val val;
+            switch val.u {
+            case IImm i;
+               efmt("%I", i);
+            case FImm f;
+               efmt("%f", f);
+            case SImm s;
+               efmt("%S", s);
+            case BImm b;
+               efmt("%s", b ? "#t" : "#f");
+            case Null;
+               efmt("#null");
+            case Tmp t;
+               efmt("%%%d", t);
+            }
+         case Ty ty; efmt("%t", ty);
+         case Fn decl; efmt("%s", decl.name);
+         case else assert(#f, "arg? %d", arg.#tag);
+         }
+      case 't';
+         efmt("%t", ap->arg(*Type));
+      case else
+         assert(#f, "bad fmt %c", c);
+      }
+   }
+   ap->end();
+}
+
+extern fn irdump(a *IRInst) void {
+   if a == #null { return; }
+
+   dump("         ");
+   #'dump do {
+      defmacro exprinst(tag, nam, n) [
+         if a.t == (tag) {
+            dump("%%%d(%t) = " ## nam ## " ", a.args[0].Val.u.Tmp, a.args[0].Val.ty);
+            for let $i = 1; $i < (n); ++$i {
+               dump("%a", a.args[$i]);
+               if $i < (n) - 1 {
+                  dump(", ");
+               }
+            }
+            dump("\n");
+            break #'dump;
+         }
+      ]
+      defmacro stmtinst(tag, nam, n) [
+         if a.t == (tag) {
+            dump(nam##" ");
+            for let $i = 0; $i < (n); ++$i {
+               dump("%a", a.args[$i]);
+               if $i < (n) - 1 {
+                  dump(", ");
+               }
+            }
+            dump("\n");
+            break #'dump;
+         }
+      ]
+
+      exprinst(:neg,   "neg", 2)
+      exprinst(:compl, "compl", 2)
+      exprinst(:fneg,  "fneg", 2)
+      exprinst(:add,   "add", 3);
+      exprinst(:sub,   "sub", 3);
+      exprinst(:mul,   "mul", 3);
+      exprinst(:div,   "div", 3);
+      exprinst(:mod,   "mod", 3);
+      exprinst(:band,  "band", 3);
+      exprinst(:bor,   "bor", 3);
+      exprinst(:xor,   "xor", 3);
+      exprinst(:lsl,   "lsl", 3);
+      exprinst(:lsr,   "lsr", 3);
+      exprinst(:asr,   "asr", 3);
+      exprinst(:fadd,  "fadd", 3);
+      exprinst(:fsub,  "fsub", 3);
+      exprinst(:fmul,  "fmul", 3);
+      exprinst(:fdiv,  "fdiv", 3);
+      if a.t == :call {
+         let fnty = a.args[1].Fn.u.Fn.ty.u.Fn;
+         dump("%%%d(%t) = call %a, ", a.args[0].Val.u.Tmp, a.args[0].Val.ty, a.args[1]);
+         let n = a.call_nargs;
+         for let i = 0; i < n; ++i {
+            dump("%a(%t)", a.args[i + 2],
+                 i < fnty.params.#len ? fnty.params[i] : a.args[i + 2].Val.ty);
+            if i < n - 1 {
+               dump(", ");
+            }
+         }
+         dump("\n");
+         break #'dump;
+      }
+
+      stmtinst(:ret0, "ret", 0);
+
+      assert(#f, "inst? %d\n", a.t);
+   } while #f;
+
+   irdump(a.next);
+}
-- 
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