Incorrect disassembly for "0x49 0x90" on x86-64 ("xchg %r8, %rax")

[efriedma-quic]

Bugzilla Link	10344
Resolution	FIXED
Resolved on	Oct 02, 2011 11:56
Version	unspecified
OS	All
Blocks	llvm/llvm-bugzilla-archive#10988
CC	@topperc

Extended Description

$ echo "0x49 0x90" | llvm-mc -disassemble
nop

This instruction is actually "xchg %r8, %rax", not a nop.

[topperc]

Fixed in r140971.

[bcardosolopes]

mentioned in issue llvm/llvm-bugzilla-archive#10988