Simplify the control flow for predefined macro selection by using
fallthrough now that we're working with a switch. Also remove a dubious
"feature" regarding k6 processors and 3dnow and leave a fixme... Not
that anyone is likely to care about correct tuning for k6 processors
with and w/o 3dnow...

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@140687 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed