From 2f738a73790258514f86614ba9a9591578a5bdf0 Mon Sep 17 00:00:00 2001
From: Bad Diode <bd@badd10de.dev>
Date: Mon, 25 Apr 2022 12:20:30 -0300
Subject: Add a return op

---
 src/ir.c  | 4 +++-
 src/ir.h  | 3 +++
 src/viz.c | 6 ++++++
 3 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/src/ir.c b/src/ir.c
index 86a1a9a..7f841be 100644
--- a/src/ir.c
+++ b/src/ir.c
@@ -156,7 +156,9 @@ generate_basm(ParseTree *parse_tree) {
     array_init(program->lines, 0);
     for (size_t i = 0; i < array_size(parse_tree->roots); ++i) {
         Node *root = parse_tree->roots[i];
-        emit_basm(program, root);
+        Operand ret = emit_basm(program, root);
+        LineInfo line = (LineInfo){.line = root->line, .col = root->col};
+        EMIT_0(program, line, OP_RETURN, ret);
     }
     return program;
 }
diff --git a/src/ir.h b/src/ir.h
index c0ce22a..6df1e0d 100644
--- a/src/ir.h
+++ b/src/ir.h
@@ -44,6 +44,9 @@ typedef enum Operator {
     OP_JMP_LT,
     OP_JMP_GE,
     OP_JMP_LE,
+
+    // Return value from register.
+    OP_RETURN,
 } Operator;
 
 typedef enum OperandType {
diff --git a/src/viz.c b/src/viz.c
index 8e31387..ebe1a4c 100644
--- a/src/viz.c
+++ b/src/viz.c
@@ -272,6 +272,7 @@ static const char* basm_op_str[] = {
     [OP_JMP_LT]     = "jlt   ",
     [OP_JMP_GE]     = "jge   ",
     [OP_JMP_LE]     = "jle   ",
+    [OP_RETURN]     = "ret   ",
 };
 
 void
@@ -311,11 +312,16 @@ viz_instruction(Instruction *inst, LineInfo *line) {
                 viz_operand(inst->src_b);
             }
         } break;
+        case OP_RETURN:
         case OP_JMP:
         case OP_LABEL: {
             printf(" ");
             viz_operand(inst->dst);
         } break;
+        case OP_CP8:
+        case OP_CP16:
+        case OP_CP32:
+        case OP_CP64:
         case OP_JMP_TRUE:
         case OP_JMP_FALSE: {
             printf(" ");
-- 
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