From c8fd4b12e3db49d795de55f74d9bac445c059f1b Mon Sep 17 00:00:00 2001
From: Michael Droettboom <mdboom@gmail.com>
Date: Fri, 18 Oct 2024 15:51:29 -0400
Subject: [PATCH] gh-125207: Fix MSVC 1935 build with JIT (#125209)

* gh-125207: Use {0} array initializers

* Simplify, as suggested in PR

* Revert change to explicitly specify length
---
 Python/jit.c           | 2 +-
 Tools/jit/_stencils.py | 2 +-
 Tools/jit/_writer.py   | 7 +++++--
 3 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/Python/jit.c b/Python/jit.c
index 234fc7dda83..963bde2303d 100644
--- a/Python/jit.c
+++ b/Python/jit.c
@@ -469,7 +469,7 @@ _PyJIT_Compile(_PyExecutorObject *executor, const _PyUOpInstruction trace[], siz
     // Loop once to find the total compiled size:
     size_t code_size = 0;
     size_t data_size = 0;
-    jit_state state = {};
+    jit_state state = {0};
     group = &trampoline;
     code_size += group->code_size;
     data_size += group->data_size;
diff --git a/Tools/jit/_stencils.py b/Tools/jit/_stencils.py
index bbb52f391f4..e4b2bf6e470 100644
--- a/Tools/jit/_stencils.py
+++ b/Tools/jit/_stencils.py
@@ -339,7 +339,7 @@ class StencilGroup:
             word = bitmask & ((1 << 32) - 1)
             trampoline_mask.append(f"{word:#04x}")
             bitmask >>= 32
-        return "{" + ", ".join(trampoline_mask) + "}"
+        return "{" + (", ".join(trampoline_mask) or "0") + "}"
 
     def as_c(self, opname: str) -> str:
         """Dump this hole as a StencilGroup initializer."""
diff --git a/Tools/jit/_writer.py b/Tools/jit/_writer.py
index 7b99d10310a..4e7f614b0e9 100644
--- a/Tools/jit/_writer.py
+++ b/Tools/jit/_writer.py
@@ -32,8 +32,11 @@ def _dump_footer(
     yield "};"
     yield ""
     yield f"static const void * const symbols_map[{max(len(symbols), 1)}] = {{"
-    for symbol, ordinal in symbols.items():
-        yield f"    [{ordinal}] = &{symbol},"
+    if symbols:
+        for symbol, ordinal in symbols.items():
+            yield f"    [{ordinal}] = &{symbol},"
+    else:
+        yield "    0"
     yield "};"