From 3f680abbe2c4d2eeefd0eb73b8af25d1768e6ceb Mon Sep 17 00:00:00 2001
From: Andrew Kelley <andrew@ziglang.org>
Date: Wed, 30 Jun 2021 18:03:54 -0700
Subject: stage2: tokenizer: require null terminated source

By requiring the source file to be null-terminated, we avoid extra
branching while simplifying the logic at the same time.

Running ast-check on a large zig source file (udivmodti4_test.zig),
master branch compared to this commit:
 * 4% faster wall clock
 * 7% fewer cache misses
 * 1% fewer branches
---
 src/Compilation.zig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/Compilation.zig')

diff --git a/src/Compilation.zig b/src/Compilation.zig
index c1cca84f62..68a008e0e1 100644
--- a/src/Compilation.zig
+++ b/src/Compilation.zig
@@ -1541,7 +1541,7 @@ pub fn create(gpa: *Allocator, options: InitOptions) !*Compilation {
         }
     }
 
-    if (comp.bin_file.options.use_stage1) {
+    if (comp.bin_file.options.use_stage1 and comp.bin_file.options.module != null) {
         try comp.work_queue.writeItem(.{ .stage1_module = {} });
     }
 
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