From 80b73e3e8fd5ef8b46152e929153ad45fc6220fd Mon Sep 17 00:00:00 2001
From: Jacob Young <jacobly0@users.noreply.github.com>
Date: Sun, 12 Nov 2023 18:10:06 -0500
Subject: x86_64: resolve tlv references on first use and spill to the stack

This avoids any arbitrary memory operand possibly clobbering rax and
sometime rdi with no warning.
---
 src/codegen.zig | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'src/codegen.zig')

diff --git a/src/codegen.zig b/src/codegen.zig
index 9420e8ca14..94f1f6ea0e 100644
--- a/src/codegen.zig
+++ b/src/codegen.zig
@@ -912,6 +912,9 @@ fn genDeclRef(
         }
         const sym_index = try elf_file.zigObjectPtr().?.getOrCreateMetadataForDecl(elf_file, decl_index);
         const sym = elf_file.symbol(sym_index);
+        if (is_threadlocal) {
+            return GenResult.mcv(.{ .load_tlv = sym.esym_index });
+        }
         return GenResult.mcv(.{ .load_symbol = sym.esym_index });
     } else if (bin_file.cast(link.File.MachO)) |macho_file| {
         if (is_extern) {
-- 
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