From 2934163518a75bf037c7467c0a1d28443203eabf Mon Sep 17 00:00:00 2001
From: Brook Heisler <brookheisler@gmail.com>
Date: Thu, 14 Jul 2022 18:29:49 -0600
Subject: [PATCH] Add missing black_box for bench_with_input parameters. Fixes
 566.

---
 CHANGELOG.md   | 4 ++++
 src/routine.rs | 6 +++---
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index d2eb6531..6b5a1153 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -31,6 +31,10 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - Formal support for benchmarking code compiled to web-assembly.
 - A `--quiet` flag for printing just a single line per benchmark.
 
+### Fixed
+- When using `bench_with_input`, the input parameter will now be passed through `black_box` before 
+  passing it to the benchmark.
+
 ## [0.3.5] - 2021-07-26
 
 ### Fixed
diff --git a/src/routine.rs b/src/routine.rs
index b4bb7c15..9567fb43 100644
--- a/src/routine.rs
+++ b/src/routine.rs
@@ -2,7 +2,7 @@ use crate::benchmark::BenchmarkConfig;
 use crate::connection::OutgoingMessage;
 use crate::measurement::Measurement;
 use crate::report::{BenchmarkId, Report, ReportContext};
-use crate::{ActualSamplingMode, Bencher, Criterion};
+use crate::{black_box, ActualSamplingMode, Bencher, Criterion};
 use std::marker::PhantomData;
 use std::time::Duration;
 
@@ -247,7 +247,7 @@ where
             .iter()
             .map(|iters| {
                 b.iters = *iters;
-                (*f)(&mut b, parameter);
+                (*f)(&mut b, black_box(parameter));
                 b.assert_iterated();
                 m.to_f64(&b.value)
             })
@@ -267,7 +267,7 @@ where
         let mut total_iters = 0;
         let mut elapsed_time = Duration::from_millis(0);
         loop {
-            (*f)(&mut b, parameter);
+            (*f)(&mut b, black_box(parameter));
 
             b.assert_iterated();