Try to get rid of a -wunitialized warning: explicitly initialize the pointer
to NULL and use asserts to check in relevant places.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176134 91177308-0d34-0410-b5e6-96231b3b80d8
Have a way for a target to opt-out of target-independent fast isel

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176136 91177308-0d34-0410-b5e6-96231b3b80d8
Enhance integer division emulation support to handle types smaller than 32 bits,
enhancement done the trivial way; by extending inputs and truncating outputs 
which is addequate for targets with little or no support for integer arithmetic
on integer types less than 32 bits.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176139 91177308-0d34-0410-b5e6-96231b3b80d8