make switch condition constant folding much more aggressive, handling 
compound statements and break statements.  This implements enough to 
handle PR9322 and rdar://6970405.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@126602 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed