Merge commit 468a0cb5f from llvm git (by Craig Topper):

[X86] Add X87 FCMOV support to X86FlagsCopyLowering.

Fixes PR44396

Merge commit 86f48999f from llvm git (by Craig Topper):

[X86] Fix typo in getCMovOpcode.

The 64-bit HasMemoryOperand line was using CMOV32rm instead of
CMOV64rm. Not sure how to test this. We have no test coverage that
passes true for HasMemoryOperand.

This fixes 'Assertion failed: (MI.findRegisterDefOperand(X86::EFLAGS) &&
"Expected a def of EFLAGS for this instruction!"), function
runOnMachineFunction' when compiling the misc/gpsim port for i386.

Reported by: yuri
Upstream PR: https://bugs.llvm.org/show_bug.cgi?id=44396
MFC after: 1 week