From bbde64e0b689712a445dd5954c2e9f9c81881b62 Mon Sep 17 00:00:00 2001
From: Andreas Kling <kling@serenityos.org>
Date: Sat, 28 Oct 2023 14:38:40 +0200
Subject: [PATCH] LibJIT: Emit 8-bit PUSH imm when possible

---
 Userland/Libraries/LibJIT/Assembler.h | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/Userland/Libraries/LibJIT/Assembler.h b/Userland/Libraries/LibJIT/Assembler.h
index 16121ea2ab..b75e71bf3a 100644
--- a/Userland/Libraries/LibJIT/Assembler.h
+++ b/Userland/Libraries/LibJIT/Assembler.h
@@ -499,9 +499,15 @@ struct Assembler {
                 emit8(0x49);
             emit8(0x50 | encode_reg(op.reg));
         } else if (op.type == Operand::Type::Imm) {
-            VERIFY(op.fits_in_i32());
-            emit8(0x68);
-            emit32(op.offset_or_immediate);
+            if (op.fits_in_i8()) {
+                emit8(0x6a);
+                emit8(op.offset_or_immediate);
+            } else if (op.fits_in_i32()) {
+                emit8(0x68);
+                emit32(op.offset_or_immediate);
+            } else {
+                VERIFY_NOT_REACHED();
+            }
         } else {
             VERIFY_NOT_REACHED();
         }