From 2aba3fc9bb465318f6a072d2f345d666acb059d4 Mon Sep 17 00:00:00 2001
From: ShaharNaveh <50263213+ShaharNaveh@users.noreply.github.com>
Date: Fri, 9 Jan 2026 16:55:02 +0200
Subject: [PATCH 1/8] Remove `Reverse` bytecode

---
 Lib/_opcode_metadata.py              |  5 ++---
 crates/compiler-core/src/bytecode.rs | 11 +++--------
 crates/vm/src/frame.rs               |  5 -----
 3 files changed, 5 insertions(+), 16 deletions(-)

diff --git a/Lib/_opcode_metadata.py b/Lib/_opcode_metadata.py
index 529f5cbf656..30903a99a9f 100644
--- a/Lib/_opcode_metadata.py
+++ b/Lib/_opcode_metadata.py
@@ -140,9 +140,8 @@
     'JUMP_IF_TRUE_OR_POP': 130,
     'JUMP_IF_NOT_EXC_MATCH': 131,
     'LOAD_CLASS_DEREF': 132,
-    'REVERSE': 133,
-    'SET_EXC_INFO': 134,
-    'SUBSCRIPT': 135,
+    'SET_EXC_INFO': 133,
+    'SUBSCRIPT': 134,
     'RESUME': 149,
     'JUMP': 252,
     'LOAD_CLOSURE': 253,
diff --git a/crates/compiler-core/src/bytecode.rs b/crates/compiler-core/src/bytecode.rs
index 19380be4713..56f32a7f77e 100644
--- a/crates/compiler-core/src/bytecode.rs
+++ b/crates/compiler-core/src/bytecode.rs
@@ -902,7 +902,7 @@ pub enum Instruction {
     Resume {
         arg: Arg<u32>,
     } = 149,
-    // ==================== RustPython-only instructions (119-135) ====================
+    // ==================== RustPython-only instructions (119-134) ====================
     // Ideally, we want to be fully aligned with CPython opcodes, but we still have some leftovers.
     // So we assign random IDs to these opcodes.
     Break {
@@ -941,11 +941,8 @@ pub enum Instruction {
     } = 130,
     JumpIfNotExcMatch(Arg<Label>) = 131,
     LoadClassDeref(Arg<NameIdx>) = 132,
-    Reverse {
-        amount: Arg<u32>,
-    } = 133,
-    SetExcInfo = 134,
-    Subscript = 135,
+    SetExcInfo = 133,
+    Subscript = 134,
     // ===== Pseudo Opcodes (252+) ======
     Jump {
         target: Arg<Label>,
@@ -1895,7 +1892,6 @@ impl Instruction {
                 -1 + before as i32 + 1 + after as i32
             }
             PopExcept => 0,
-            Reverse { .. } => 0,
             GetAwaitable => 0,
             BeforeAsyncWith => 1,
             GetAIter => 0,
@@ -2068,7 +2064,6 @@ impl Instruction {
             Resume { arg } => w!(RESUME, arg),
             ReturnConst { idx } => fmt_const("RETURN_CONST", arg, f, idx),
             ReturnValue => w!(RETURN_VALUE),
-            Reverse { amount } => w!(REVERSE, amount),
             Send { target } => w!(SEND, target),
             SetAdd { i } => w!(SET_ADD, i),
             SetExcInfo => w!(SET_EXC_INFO),
diff --git a/crates/vm/src/frame.rs b/crates/vm/src/frame.rs
index 275269c5cbe..f7b3eeab9af 100644
--- a/crates/vm/src/frame.rs
+++ b/crates/vm/src/frame.rs
@@ -1478,11 +1478,6 @@ impl ExecutingFrame<'_> {
                 let value = self.pop_value();
                 self.unwind_blocks(vm, UnwindReason::Returning { value })
             }
-            bytecode::Instruction::Reverse { amount } => {
-                let stack_len = self.state.stack.len();
-                self.state.stack[stack_len - amount.get(arg) as usize..stack_len].reverse();
-                Ok(None)
-            }
             bytecode::Instruction::SetAdd { i } => {
                 let item = self.pop_value();
                 let obj = self.nth_value(i.get(arg));

From 2cf54f8e970089b8ac0dbd25e16acca09ea20697 Mon Sep 17 00:00:00 2001
From: Shahar Naveh <50263213+ShaharNaveh@users.noreply.github.com>
Date: Fri, 9 Jan 2026 17:22:32 +0200
Subject: [PATCH 2/8] Update crates/compiler-core/src/bytecode.rs

Co-authored-by: Jeong, YunWon <69878+youknowone@users.noreply.github.com>
---
 crates/compiler-core/src/bytecode.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/crates/compiler-core/src/bytecode.rs b/crates/compiler-core/src/bytecode.rs
index 56f32a7f77e..f56afc180a0 100644
--- a/crates/compiler-core/src/bytecode.rs
+++ b/crates/compiler-core/src/bytecode.rs
@@ -941,8 +941,8 @@ pub enum Instruction {
     } = 130,
     JumpIfNotExcMatch(Arg<Label>) = 131,
     LoadClassDeref(Arg<NameIdx>) = 132,
-    SetExcInfo = 133,
-    Subscript = 134,
+    SetExcInfo = 134,
+    Subscript = 135,
     // ===== Pseudo Opcodes (252+) ======
     Jump {
         target: Arg<Label>,

From ad05793bce7d6cad5f4c16b19773de748c9206c0 Mon Sep 17 00:00:00 2001
From: ShaharNaveh <50263213+ShaharNaveh@users.noreply.github.com>
Date: Fri, 9 Jan 2026 17:24:01 +0200
Subject: [PATCH 3/8] Gen

---
 Lib/_opcode_metadata.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Lib/_opcode_metadata.py b/Lib/_opcode_metadata.py
index 30903a99a9f..597b23163a6 100644
--- a/Lib/_opcode_metadata.py
+++ b/Lib/_opcode_metadata.py
@@ -140,8 +140,8 @@
     'JUMP_IF_TRUE_OR_POP': 130,
     'JUMP_IF_NOT_EXC_MATCH': 131,
     'LOAD_CLASS_DEREF': 132,
-    'SET_EXC_INFO': 133,
-    'SUBSCRIPT': 134,
+    'SET_EXC_INFO': 134,
+    'SUBSCRIPT': 135,
     'RESUME': 149,
     'JUMP': 252,
     'LOAD_CLOSURE': 253,

From 0ec4e61a3d1d658e5381b2bb4d148d480ee0c1bc Mon Sep 17 00:00:00 2001
From: ShaharNaveh <50263213+ShaharNaveh@users.noreply.github.com>
Date: Sat, 10 Jan 2026 10:37:12 +0200
Subject: [PATCH 4/8] Remove Reverse

---
 crates/compiler-core/src/bytecode.rs | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/crates/compiler-core/src/bytecode.rs b/crates/compiler-core/src/bytecode.rs
index ee388a41dec..3686dbb7b4a 100644
--- a/crates/compiler-core/src/bytecode.rs
+++ b/crates/compiler-core/src/bytecode.rs
@@ -997,9 +997,6 @@ impl TryFrom<u8> for Instruction {
             }),
             u8::from(Self::JumpIfNotExcMatch(Arg::marker())),
             u8::from(Self::LoadClassDeref(Arg::marker())),
-            u8::from(Self::Reverse {
-                amount: Arg::marker(),
-            }),
             u8::from(Self::SetExcInfo),
             u8::from(Self::Subscript),
         ];

From f44295469d6be10014eca3a09bbc8974d47b3758 Mon Sep 17 00:00:00 2001
From: "github-actions[bot]" <github-actions[bot]@users.noreply.github.com>
Date: Sat, 10 Jan 2026 08:37:47 +0000
Subject: [PATCH 5/8] Auto-format: cargo fmt --all

---
 Lib/_opcode_metadata.py | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/Lib/_opcode_metadata.py b/Lib/_opcode_metadata.py
index 21ee5ae7da1..e72a76a576c 100644
--- a/Lib/_opcode_metadata.py
+++ b/Lib/_opcode_metadata.py
@@ -4,10 +4,6 @@
 
 _specializations = {}
 
-
-
-
-
 _specialized_opmap = {}
 
 opmap = {

From e847ff405dc11c4fdd2b0a5a07593c024e4920b6 Mon Sep 17 00:00:00 2001
From: ShaharNaveh <50263213+ShaharNaveh@users.noreply.github.com>
Date: Sat, 10 Jan 2026 10:51:06 +0200
Subject: [PATCH 6/8] Revert comment

---
 crates/compiler-core/src/bytecode.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/crates/compiler-core/src/bytecode.rs b/crates/compiler-core/src/bytecode.rs
index 3686dbb7b4a..0c4522e9f99 100644
--- a/crates/compiler-core/src/bytecode.rs
+++ b/crates/compiler-core/src/bytecode.rs
@@ -902,7 +902,7 @@ pub enum Instruction {
     Resume {
         arg: Arg<u32>,
     } = 149,
-    // ==================== RustPython-only instructions (119-134) ====================
+    // ==================== RustPython-only instructions (119-135) ====================
     // Ideally, we want to be fully aligned with CPython opcodes, but we still have some leftovers.
     // So we assign random IDs to these opcodes.
     Break {

From ab43e94dee1fe4dd1d7c1f71865f3d5354e4508b Mon Sep 17 00:00:00 2001
From: ShaharNaveh <50263213+ShaharNaveh@users.noreply.github.com>
Date: Sat, 10 Jan 2026 10:51:25 +0200
Subject: [PATCH 7/8] Remove debug code

---
 scripts/generate_opcode_metadata.py | 2 --
 1 file changed, 2 deletions(-)

diff --git a/scripts/generate_opcode_metadata.py b/scripts/generate_opcode_metadata.py
index 4ebdfd81776..5c0c3811259 100644
--- a/scripts/generate_opcode_metadata.py
+++ b/scripts/generate_opcode_metadata.py
@@ -25,8 +25,6 @@ def cpython_name(self) -> str:
         name = self.rust_name
         name = re.sub(r"(?<=[a-z0-9])([A-Z])", r"_\1", name)
         return re.sub(r"(\D)(\d+)$", r"\1_\2", name).upper()
-        return re.sub(r"(?<=[a-z0-9])([A-Z])", r"_\1", self.rust_name).upper()
-        return re.sub(r"(?<!^)(?=[A-Z])", "_", self.rust_name).upper()
 
     @classmethod
     def from_str(cls, body: str):

From d879bf17c568ed58b4d04411856e17ab295410ed Mon Sep 17 00:00:00 2001
From: ShaharNaveh <50263213+ShaharNaveh@users.noreply.github.com>
Date: Sat, 10 Jan 2026 11:16:11 +0200
Subject: [PATCH 8/8] Fix CI

---
 .github/workflows/ci.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 06cf06970a8..d075a9cd280 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -334,7 +334,7 @@ jobs:
       - name: Ensure Lib/_opcode_metadata is updated
         run: |
           python scripts/generate_opcode_metadata.py
-          if [ -z "$(git status --porcelain)" ]; then
+          if [ -n "$(git status --porcelain)" ]; then
             exit 1
           fi