<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:8pt"><div>Hi,</div><div><br></div><div style="color: rgb(0, 0, 0); font-size: 10.6667px; font-family: HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif; background-color: transparent; font-style: normal;">these two patches enable merging several S_LOAD_BUFFER_DWORD into a vector instruction.</div><div style="color: rgb(0, 0, 0); font-size: 10.6667px; font-family: HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif; background-color: transparent; font-style: normal;">It does not use the SLPVectorizer because it doesnt seem to work on overloaded intrinsics.<br></div><div style="color: rgb(0, 0, 0); font-size: 10.6667px; font-family: HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif; background-color: transparent; font-style:
normal;"><br></div><div style="color: rgb(0, 0, 0); font-size: 10.6667px; font-family: HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif; background-color: transparent; font-style: normal;">I used codeXL output from AMD's openCL sample "ConstantBandwidth", and it looks like the driver does not attempt to merge more than 4x dword together,</div><div style="color: rgb(0, 0, 0); font-size: 10.6667px; font-family: HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif; background-color: transparent; font-style: normal;">that's why the new pass does not attempt to merge more than 4 scalar load together. I suspect the latency advantage of using a 8 or 16x dword load doesn't outweight</div><div style="color: rgb(0, 0, 0); font-size: 10.6667px; font-family: HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif; background-color: transparent; font-style: normal;">the additionnal scalar register
consumption.</div><div style="color: rgb(0, 0, 0); font-size: 10.6667px; font-family: HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif; background-color: transparent; font-style: normal;"><br></div><div style="color: rgb(0, 0, 0); font-size: 10.6667px; font-family: HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif; background-color: transparent; font-style: normal;">Vincent<br></div></div></body></html>