search for: d70042

...ion to the subject of this message I got my first round of patches successfully reviewed and committed. As a matter of reference, they are the following: > > https://reviews.llvm.org/D69116 > https://reviews.llvm.org/D69120 > https://reviews.llvm.org/D69326 > https://reviews.llvm.org/D70042 > > They provided hooks in TargetLowering and DAGCombine that enable interested targets to implement a filter for expensive shift operations. The patches work by preventing certain transformations that would result in expensive code for these targets. > > I want to express my gratitude...

...subject of this message I got my first round of patches > successfully reviewed and committed. As a matter of reference, they are the > following: > > https://reviews.llvm.org/D69116 > https://reviews.llvm.org/D69120 > https://reviews.llvm.org/D69326 > https://reviews.llvm.org/D70042 > > They provided hooks in TargetLowering and DAGCombine that enable > interested targets to implement a filter for expensive shift operations. > The patches work by preventing certain transformations that would result in > expensive code for these targets. > > I want to expres...

...ot my first round of >> patches successfully reviewed and committed. As a matter of reference, they >> are the following: >> >> https://reviews.llvm.org/D69116 >> https://reviews.llvm.org/D69120 >> https://reviews.llvm.org/D69326 >> https://reviews.llvm.org/D70042 >> >> They provided hooks in TargetLowering and DAGCombine that enable >> interested targets to implement a filter for expensive shift operations. >> The patches work by preventing certain transformations that would result in >> expensive code for these targets. >&g...

Hi All, While implementing a custom 16 bit target for academical and demonstration purposes, I unexpectedly found that LLVM was not really ready for 8 bit and 16 bit targets. Let me expose why. Target backends can be divided into two major categories, with essentially nothing in between: Type 1: The big 32 or 64 bit targets. Heavily pipelined with expensive branches, running at clock