Make FastISel::SelectInstruction return before target specific fast-isel code
handles Intrinsic::trap if TargetOptions::TrapFuncName is set.

This fixes a bug in which the trap function was not taken into consideration
when a program was compiled without optimization (at -O0).

<rdar://problem/16291933>



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206323 91177308-0d34-0410-b5e6-96231b3b80d8
[Allocator] Remove a really problematic overload. This is very confusing
because there is another (size_t, size_t) overload of Allocator, and the
only distinguishing factor is that one is a tempalte and the other
isn't. There was only one usage of this and that one was easily
converted to carry the alignment constraint in the type itself.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206325 91177308-0d34-0410-b5e6-96231b3b80d8
[Allocator] Fold the two templated overloads into a single one with
a default argument. The allocator interface we're modeling doesn't
distinguish between array and non-array allocation.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206327 91177308-0d34-0410-b5e6-96231b3b80d8