Rangeify a loop. NFC.

llvm-svn: 265846

llvm/lib/Target/X86/X86ISelLowering.cpp

@@ -16794,12 +16794,11 @@ X86TargetLowering::LowerDYNAMIC_STACKALLOC(SDValue Op,
       // The 64 bit implementation of segmented stacks needs to clobber both r10
       // r11. This makes it impossible to use it along with nested parameters.
       const Function *F = MF.getFunction();
-
-      for (Function::const_arg_iterator I = F->arg_begin(), E = F->arg_end();
-           I != E; ++I)
-        if (I->hasNestAttr())
+      for (const auto &A : F->args()) {
+        if (A.hasNestAttr())
           report_fatal_error("Cannot use segmented stacks with functions that "
                              "have nested arguments.");
+      }
     }
 
     const TargetRegisterClass *AddrRegClass = getRegClassFor(SPTy);