[X86] Add ImmArg markings to intrinsics.

Remove test cases that checked for not crashing when immediate operands were passed not an immediate. These are now considered ill-formed in IR.

This was done by manually scanning the intrinsic file for llvm_i32_ty and llvm_i8_ty which are the predominant types we use for immediates. Most of them are on vector intrinsics. I might have missed some other intrinsics.

Differential Revision: https://reviews.llvm.org/D58302

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@355993 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed