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a6afad8b33
There are two add-immediate instructions in Thumb1: tADDi8 and tADDi3. Only the latter supports using different source and destination registers, so whenever we materialize a new base register (at a certain offset) we'd do so by moving the base register value to the new register and then adding in place. This patch changes the code to use a single tADDi3 if the offset is small enough to fit in 3 bits. Differential Revision: http://reviews.llvm.org/D5006 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216193 91177308-0d34-0410-b5e6-96231b3b80d8