From e74aa2bdff5420458f7dddce070e8a00a6dfdfe8 Mon Sep 17 00:00:00 2001
From: Simonas Kazlauskas <git@kazlauskas.me>
Date: Thu, 21 Jan 2016 18:57:43 +0200
Subject: [MIR] Promote temps to alloca on multi-assignment

Fixes #31002
---
 src/librustc_data_structures/bitvec.rs | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

(limited to 'src/librustc_data_structures/bitvec.rs')

diff --git a/src/librustc_data_structures/bitvec.rs b/src/librustc_data_structures/bitvec.rs
index f26307fd8c5..70f50b4c042 100644
--- a/src/librustc_data_structures/bitvec.rs
+++ b/src/librustc_data_structures/bitvec.rs
@@ -24,12 +24,14 @@ impl BitVector {
         (self.data[word] & mask) != 0
     }
 
+    /// Returns true if the bit has changed.
     pub fn insert(&mut self, bit: usize) -> bool {
         let (word, mask) = word_mask(bit);
         let data = &mut self.data[word];
         let value = *data;
-        *data = value | mask;
-        (value | mask) != value
+        let new_value = value | mask;
+        *data = new_value;
+        new_value != value
     }
 
     pub fn insert_all(&mut self, all: &BitVector) -> bool {
-- 
cgit 1.4.1-3-g733a5