From 6576c3b898fb57a588c4344211c06b079a82ee91 Mon Sep 17 00:00:00 2001
From: Matthew Lugg <mlugg@mlugg.co.uk>
Date: Fri, 31 Oct 2025 13:01:42 +0000
Subject: [PATCH] x86_64: spill eflags when initializing bool vector

---
 src/codegen/x86_64/CodeGen.zig | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/codegen/x86_64/CodeGen.zig b/src/codegen/x86_64/CodeGen.zig
index 8e54a3a8c0..94394185bd 100644
--- a/src/codegen/x86_64/CodeGen.zig
+++ b/src/codegen/x86_64/CodeGen.zig
@@ -180028,6 +180028,8 @@ fn airAggregateInitBoolVec(self: *CodeGen, inst: Air.Inst.Index) !void {
     {
         const dst_lock = self.register_manager.lockRegAssumeUnused(dst_reg);
         defer self.register_manager.unlockReg(dst_lock);
+
+        try self.spillEflagsIfOccupied();
         try self.asmRegisterRegister(
             .{ ._, .xor },
             registerAlias(dst_reg, @min(result_size, 4)),