[LLVMdev] Emitting x86 Multi-Byte NOP in MachineFunctionPass

[John Criswell]

Dear All,

I'm trying to emit one of the multi-byte NOP sequences for x86.  Any one 
of the following NOP encodings will do:

0x66 0x90
0x0f 0x1f 0x00
0x0f 0x1f 0x40 0x00

In LLVM 3.1, there doesn't seem to be a multi-byte NOP in the TD files.

Is there a way to get a MachineFunctionPass to emit one of these 
sequences (or to just tell it to emit a certain byte sequence into the 
code segment)?

-- John T.