X86 backend.
The code generated for symbolic targets is identical to the code generated for
constant targets, except that a relocation is emitted to fix up the actual
target address at link-time. This allows IR and object files containing
patchpoints to be cached across JIT-invocations where the target address may
change.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@235483 91177308-0d34-0410-b5e6-96231b3b80d8