improve portability to systems that don't have powf/modf (e.g. solaris 9)
patch by Evzen Muller!



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103876 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/RegAllocLinearScan.cpp b/lib/CodeGen/RegAllocLinearScan.cpp
index 6c8fc0c..bc331f0 100644
--- a/lib/CodeGen/RegAllocLinearScan.cpp
+++ b/lib/CodeGen/RegAllocLinearScan.cpp
@@ -809,7 +809,7 @@
     MachineInstr *MI = &*I;
     if (cur->liveAt(li_->getInstructionIndex(MI))) {
       unsigned loopDepth = loopInfo->getLoopDepth(MI->getParent());
-      Conflicts += powf(10.0f, (float)loopDepth);
+      Conflicts += std::pow(10.0f, (float)loopDepth);
     }
   }
   return Conflicts;