From f2297c20b69d942fd1e8fdcdd8f4d142c71de662 Mon Sep 17 00:00:00 2001
From: Matthew Sotoudeh <matthew@masot.net>
Date: Sun, 30 Jul 2023 18:09:52 -0700
Subject: bad line numbers support

---
 codegen.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

(limited to 'codegen.c')

diff --git a/codegen.c b/codegen.c
index 5111c76..7acd2c9 100644
--- a/codegen.c
+++ b/codegen.c
@@ -60,6 +60,11 @@ static int count(void) {
   return i++;
 }
 
+static void emit_line(struct Token *tok) {
+  if (opt_line_numbers && tok && tok->line_no && tok->filename)
+    println("#line %d \"%s\"", tok->line_no, tok->filename);
+}
+
 static int RETURN_TMP;
 
 void print_label(char *label) {
@@ -305,8 +310,7 @@ static void gen_addr(Node *node, int to_tmp) {
 
 // Generate code for a given node.
 static void gen_expr(Node *node, int to_tmp) {
-  // println("  .loc %d %d", node->tok->file->file_no, node->tok->line_no);
-
+  emit_line(node->tok);
   switch (node->kind) {
   case ND_NULL_EXPR:
     return;
@@ -560,6 +564,7 @@ static void gen_expr(Node *node, int to_tmp) {
 }
 
 static void gen_stmt(Node *node) {
+  emit_line(node->tok);
   switch (node->kind) {
   case ND_IF: {
     int cond = count(), condfalse = count(), c = count();
@@ -838,6 +843,8 @@ static void emit_text(Obj *prog) {
     if (!fn->is_function || !fn->is_definition)
       continue;
 
+    emit_line(fn->body->tok);
+
     // No code is emitted for "static inline" functions
     // if no one is referencing them.
     if (!fn->is_live)
-- 
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