X86RegisterInfo: eliminateFrameIndex: Avoid code duplication; NFC
Re-Commit of r300922 and r300923 with less aggressive assert (see
discussion at the end of https://reviews.llvm.org/D32205)
X86RegisterInfo::eliminateFrameIndex() and
X86FrameLowering::getFrameIndexReference() both had logic to compute the
base register. This consolidates the code.
Also use MachineInstr::isReturn instead of manually enumerating tail
call instructions (return instructions were not included in the previous
list because they never reference frame indexes).
Differential Revision: https://reviews.llvm.org/D32206
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@301211 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed