[MSP430] Assertion: Trying to add an operand to a machine instr that is already done!

[llvmbot]

Bugzilla Link	37618
Version	trunk
OS	All
Attachments	Simplified ir, Original IR
Reporter	LLVM Bugzilla Contributor
CC	@asl

Extended Description

Running llc -O3 on this IR fails with assertion:

Assertion failed: ((isImpReg || Op.isRegMask() || MCID->isVariadic() || OpNo < MCID->getNumOperands() || isMetaDataOp) && "Trying to add an operand to a machine instr that is already done!"), function addOperand, file /Users/vadzim/Documents/llvm/lib/CodeGen/MachineInstr.cpp, line 234.

[asl]

Does not crash for me anymore. Seems to be fixed?