From 50a38725e1841aa2283f198dbc8ef2bd5bd1370b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Emilio=20Cobos=20=C3=81lvarez?= <emilio@crisal.io>
Date: Mon, 19 Feb 2018 01:55:50 +0100
Subject: [PATCH] rustc_metadata: Load the profiler runtime if we're generating
 PGO profile data.
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This contains all the actual profiling code.

Signed-off-by: Emilio Cobos Álvarez <emilio@crisal.io>
---
 src/librustc_metadata/creader.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/librustc_metadata/creader.rs b/src/librustc_metadata/creader.rs
index baaf57c89089..812bbf29cf19 100644
--- a/src/librustc_metadata/creader.rs
+++ b/src/librustc_metadata/creader.rs
@@ -784,7 +784,9 @@ impl<'a> CrateLoader<'a> {
     }
 
     fn inject_profiler_runtime(&mut self) {
-        if self.sess.opts.debugging_opts.profile {
+        if self.sess.opts.debugging_opts.profile ||
+            self.sess.opts.cg.pgo_gen.is_some()
+        {
             info!("loading profiler");
 
             let symbol = Symbol::intern("profiler_builtins");