From 2c71adaaa21e5d9e4fe80625e41982ac83303df8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?John=20K=C3=A5re=20Alsaker?= <john.kare.alsaker@gmail.com>
Date: Thu, 15 Jan 2015 09:22:27 +0100
Subject: [PATCH] Disable -C lto optimizations on opt_level=0

Fixes #21184
---
 src/librustc_trans/back/lto.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/librustc_trans/back/lto.rs b/src/librustc_trans/back/lto.rs
index d7148bdaa1fe8..c0b1492a78450 100644
--- a/src/librustc_trans/back/lto.rs
+++ b/src/librustc_trans/back/lto.rs
@@ -167,7 +167,10 @@ pub fn run(sess: &session::Session, llmod: ModuleRef,
         llvm::LLVMRustAddAnalysisPasses(tm, pm, llmod);
         llvm::LLVMRustAddPass(pm, "verify\0".as_ptr() as *const _);
 
+        let opt = sess.opts.cg.opt_level.unwrap_or(0) as libc::c_uint;
+
         let builder = llvm::LLVMPassManagerBuilderCreate();
+        llvm::LLVMPassManagerBuilderSetOptLevel(builder, opt);
         llvm::LLVMPassManagerBuilderPopulateLTOPassManager(builder, pm,
             /* Internalize = */ False,
             /* RunInliner = */ True);