Tidy up several unbeseeming casts from pointer to intptr_t.

llvm-svn: 55779
diff --git a/llvm/lib/Target/ARM/ARMConstantIslandPass.cpp b/llvm/lib/Target/ARM/ARMConstantIslandPass.cpp
index f577de5..73c5618 100644
--- a/llvm/lib/Target/ARM/ARMConstantIslandPass.cpp
+++ b/llvm/lib/Target/ARM/ARMConstantIslandPass.cpp
@@ -129,7 +129,7 @@
     bool isThumb;
   public:
     static char ID;
-    ARMConstantIslands() : MachineFunctionPass((intptr_t)&ID) {}
+    ARMConstantIslands() : MachineFunctionPass(&ID) {}
 
     virtual bool runOnMachineFunction(MachineFunction &Fn);