search for: performshiftcombine

...ssible vector immediates for the "one register plus a modified immediate" format. In this case it doesn't matter because the canonical encoding of a zero vector is just zero. When you find that case, use DAG.getNode() to return a new node for the compare against zero operation. The PerformShiftCombine function is a fairly simple example of what needs to be done (although it's doing a completely different combination). 3. Write a testcase and make sure it works. Thanks for offering to work on this!

Hi folks, me again, So, I want to implement a simple optimization in a NEON case I've seen these days, most as a matter of exercise, but it also simplifies (just a bit) the code generated. The case is simple: uint32x2_t x, res; res = vceq_u32(x, vcreate_u32(0)); This will generate the following code: ; zero d16 vmov.i32 d16, #0x0 ; load a