From 036e0d7943f274fc3269a9cd67d2c922e397fcaf Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Emilio=20Cobos=20=C3=81lvarez?= <emilio@crisal.io>
Date: Mon, 12 Mar 2018 20:45:35 +0100
Subject: [PATCH] librustc_trans: disable profiling pre-inlining.
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It destroys performance actually.

Signed-off-by: Emilio Cobos Álvarez <emilio@crisal.io>
---
 src/librustc_trans/llvm_util.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/librustc_trans/llvm_util.rs b/src/librustc_trans/llvm_util.rs
index 5113b65a5c47..12364b32d116 100644
--- a/src/librustc_trans/llvm_util.rs
+++ b/src/librustc_trans/llvm_util.rs
@@ -61,6 +61,7 @@ unsafe fn configure_llvm(sess: &Session) {
         add("rustc"); // fake program name
         if sess.time_llvm_passes() { add("-time-passes"); }
         if sess.print_llvm_passes() { add("-debug-pass=Structure"); }
+        add("-disable-preinline");
 
         for arg in &sess.opts.cg.llvm_args {
             add(&(*arg));