From 9d5a133f18f16108543cd54b2b37ee4e17f09cac Mon Sep 17 00:00:00 2001
From: Andrew Kelley <andrew@ziglang.org>
Date: Tue, 23 Jan 2024 20:24:58 -0700
Subject: [PATCH] Revert "Don't assume a write if an operand is not in function
 parameters"

This reverts commit 2ab78937dd29fbc299ac434f962a5ff41002cc43.

Premature merge - apologies for the disruption.

Reopens #15685
Reopens #17580
---
 src/Liveness.zig | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/Liveness.zig b/src/Liveness.zig
index 6227da3ede..56b70be317 100644
--- a/src/Liveness.zig
+++ b/src/Liveness.zig
@@ -489,7 +489,7 @@ pub fn categorizeOperand(
                 for (args, 0..) |arg, i| {
                     if (arg == operand_ref) return matchOperandSmallIndex(l, inst, @as(OperandInt, @intCast(i + 1)), .write);
                 }
-                return .none;
+                return .write;
             }
             var bt = l.iterateBigTomb(inst);
             if (bt.feed()) {
@@ -504,7 +504,7 @@ pub fn categorizeOperand(
                     if (arg == operand_ref) return .write;
                 }
             }
-            return .none;
+            return .write;
         },
         .select => {
             const pl_op = air_datas[@intFromEnum(inst)].pl_op;