PTX: Fix alignment logic

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140709 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PTX/PTXAsmPrinter.cpp b/lib/Target/PTX/PTXAsmPrinter.cpp
index 80b1a4b..75136a7 100644
--- a/lib/Target/PTX/PTXAsmPrinter.cpp
+++ b/lib/Target/PTX/PTXAsmPrinter.cpp
@@ -444,7 +444,7 @@
   unsigned alignment = gv->getAlignment();
   if (alignment != 0) {
     decl += ".align ";
-    decl += utostr(std::max(1U, Log2_32(gv->getAlignment())));
+    decl += utostr(gv->getAlignment());
     decl += " ";
   }