x86: NFC: Make getCallPreservedMask() more similar to getCalleeSavedRegs()

Changing order of checks in getCallPreservedMask() to match
getCalleeSavedRegs() so that the logic is easier to compare.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203939 91177308-0d34-0410-b5e6-96231b3b80d8
x86: Add missing break to getCallPreservedMask()

This change brings getCallPreservedMask()'s logic in line with
getCalleeSavedRegs().

While this changes the control flow slightly, the change is not
currently observable.  is64Bit must be false to get to the accidental
fallthrough, but the case that we fall into (coldcc) does nothing unless
is64Bit is true.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203943 91177308-0d34-0410-b5e6-96231b3b80d8
DwarfDebug: Remove some needless recursion.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203946 91177308-0d34-0410-b5e6-96231b3b80d8