Add required header

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13417 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/RegAllocLinearScan.cpp b/lib/CodeGen/RegAllocLinearScan.cpp
index dcfb597f95475425b5bc67c280b38e3875ded2b5..ed7da0f8c8fef56c3e43544d57946171434b0cf4 100644 (file)
--- a/lib/CodeGen/RegAllocLinearScan.cpp
+++ b/lib/CodeGen/RegAllocLinearScan.cpp
@@ -25,6 +25,7 @@
 #include "PhysRegTracker.h"
 #include "VirtRegMap.h"
 #include <algorithm>
+#include <cmath>
 #include <iostream>
 
 using namespace llvm;