From d779f74d6eb6ac961a64b37be7f82fba2a6921d1 Mon Sep 17 00:00:00 2001
From: Stephen Gutekanst <stephen@hexops.com>
Date: Sat, 24 Feb 2024 12:49:45 -0700
Subject: [PATCH] msl: fix codegen for pixel-post-process example

Signed-off-by: Stephen Gutekanst <stephen@hexops.com>
---
 src/shader/codegen/msl.zig | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/shader/codegen/msl.zig b/src/shader/codegen/msl.zig
index 609d7d85c..b1a05e002 100644
--- a/src/shader/codegen/msl.zig
+++ b/src/shader/codegen/msl.zig
@@ -287,8 +287,9 @@ fn emitFn(msl: *Msl, inst: Inst.Fn) !void {
         const slice = msl.fn_emit_list.entries.slice();
         const keys = slice.items(.key).ptr;
         const values = slice.items(.value).ptr;
-        var i: usize = 0;
-        while (i < slice.len) : (i += 1) {
+        var i: usize = slice.len;
+        while (i > 0) {
+            i -= 1;
             if (values[i] == false) {
                 values[i] = true;
                 try msl.emitFn(msl.air.getInst(keys[i]).@"fn");