[llvm] r372598 - Function::BuildLazyArguments() - fix "variable used but never read" analyzer warning. NFCI.

[Simon Pilgrim via llvm-commits]

Author: rksimon
Date: Mon Sep 23 05:49:39 2019
New Revision: 372598

URL: http://llvm.org/viewvc/llvm-project?rev=372598&view=rev
Log:
Function::BuildLazyArguments() - fix "variable used but never read" analyzer warning. NFCI.

Simplify the code by separating the masking of the SDC variable from using it.

Modified:
    llvm/trunk/lib/IR/Function.cpp

Modified: llvm/trunk/lib/IR/Function.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/IR/Function.cpp?rev=372598&r1=372597&r2=372598&view=diff
==============================================================================
--- llvm/trunk/lib/IR/Function.cpp (original)
+++ llvm/trunk/lib/IR/Function.cpp Mon Sep 23 05:49:39 2019
@@ -293,7 +293,8 @@ void Function::BuildLazyArguments() cons
 
   // Clear the lazy arguments bit.
   unsigned SDC = getSubclassDataFromValue();
-  const_cast<Function*>(this)->setValueSubclassData(SDC &= ~(1<<0));
+  SDC &= ~(1 << 0);
+  const_cast<Function*>(this)->setValueSubclassData(SDC);
   assert(!hasLazyArguments());
 }