From e9ae9a5fc45a6ee85d988372a4d150032f52ef4c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Alex=20R=C3=B8nne=20Petersen?= <alex@alexrp.com>
Date: Thu, 31 Oct 2024 09:00:46 +0100
Subject: [PATCH] llvm: Don't set nonnull attribute on allowzero slices.

---
 src/codegen/llvm.zig | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/codegen/llvm.zig b/src/codegen/llvm.zig
index 0c6aaa66fb..0bbc3aee46 100644
--- a/src/codegen/llvm.zig
+++ b/src/codegen/llvm.zig
@@ -1341,7 +1341,7 @@ pub const Object = struct {
                                 try attributes.addParamAttr(llvm_arg_i, .@"noalias", &o.builder);
                             }
                         }
-                        if (param_ty.zigTypeTag(zcu) != .optional) {
+                        if (param_ty.zigTypeTag(zcu) != .optional and !ptr_info.flags.is_allowzero) {
                             try attributes.addParamAttr(llvm_arg_i, .nonnull, &o.builder);
                         }
                         if (ptr_info.flags.is_const) {
@@ -5410,7 +5410,7 @@ pub const FuncGen = struct {
                             try attributes.addParamAttr(llvm_arg_i, .@"noalias", &o.builder);
                         }
                     }
-                    if (param_ty.zigTypeTag(zcu) != .optional) {
+                    if (param_ty.zigTypeTag(zcu) != .optional and !ptr_info.flags.is_allowzero) {
                         try attributes.addParamAttr(llvm_arg_i, .nonnull, &o.builder);
                     }
                     if (ptr_info.flags.is_const) {