[X86] Fix liveness information when expanding X86::EH_SjLj_LongJmp64

test/CodeGen/X86/shadow-stack.ll has the following machine verifier
errors:

```
*** Bad machine code: Using a killed virtual register ***
- function:    bar
- basic block: %bb.6 entry (0x7fdc81857818)
- instruction: %3:gr64 = MOV64rm killed %2:gr64, 1, $noreg, 8, $noreg
- operand 1:   killed %2:gr64

*** Bad machine code: Using a killed virtual register ***
- function:    bar
- basic block: %bb.6 entry (0x7fdc81857818)
- instruction: $rsp = MOV64rm killed %2:gr64, 1, $noreg, 16, $noreg
- operand 1:   killed %2:gr64

*** Bad machine code: Virtual register killed in block, but needed live out. ***
- function:    bar
- basic block: %bb.2 entry (0x7fdc818574f8)
Virtual register %2 is used after the block.
```

The fix here is to only copy the machine operand's register without the
kill flags for all the instructions except the very last one of the
sequence.

I had to insert dummy PHIs in the test case to force the NoPHI function
property to be set to false. More on this here: https://llvm.org/PR38439

Differential Revision: https://reviews.llvm.org/D50260

llvm-svn: 340033

0 files changed, 0 insertions, 0 deletions