private long extendOffset(long offset, int bitLength) {
				// Properly extend the stack offset for -/+
				return (offset << (64 - bitLength)) >> (64 - bitLength);
			}
Create locals and parameters based on references involving purely the stack pointer.
Pushes, Pops, and arithmetic manipulation of the stack pointer must be tracked.

@param func - function to analyze stack pointer references
Ghidra/Features/Base/src/main/java/ghidra/app/cmd/function/NewFunctionStackAnalysisCmd.java