sparse/sparse-dev.git - Sparse's development tree with unstable git history

Age	Commit message (Collapse)	Author	Files	Lines
2018-07-25	shift: simplify LSR(LSR(x,N),N') & friends	Luc Van Oostenryck	1	-0/+149
	A shift of a shift (of the same kind) is equivalent to a single shitf with a count equal to the sum of the two initial counts. In addition: * for LSRs & SHLs, if the sum is >= to the instruction size, then the result is zero. * for ASRs, if the sum is >= to the instruction size, then the result is the same as a shift of a count of size - 1. Implement these simplifications if both shift counts are in range. Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>