009971a0d3
The code was using the number of source operands plus one. The plus one seems to be an ARM specific value accounting for one of the source operands having 2 sub operands. No other target in tree uses PseudoLowering with variadic instructions so this worked. This patch replaces it with a proper count of the number of sub operands of all operands. While there I update the loop to use MIOperandNo so we don't need to count up the sub operands as we go.
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