search for: genwidenvectorstores

...h the same. I'd really like if I could have LLVM treat vec3 as vec4 but I haven't found out how. Currently the target has emulated support for vec3 through LLVM. Loads are already widened by LLVM to a vec4. Stores are kind of funny. By default LLVM sets the action to 'widen' but in GenWidenVectorStores what ends up happening is an 2:1 split of the vector that's less efficient in this case than actually widening the vector. The reason is that at this point the call to FindMemType assumes that stores can never be widened to a bigger type and so those types are not considered. The call sequence...

...h the same. I'd really like if I could have LLVM treat vec3 as vec4 but I haven't found out how. Currently the target has emulated support for vec3 through LLVM. Loads are already widened by LLVM to a vec4. Stores are kind of funny. By default LLVM sets the action to 'widen' but in GenWidenVectorStores what ends up happening is an 2:1 split of the vector that's less efficient in this case than actually widening the vector. The reason is that at this point the call to FindMemType assumes that stores can never be widened to a bigger type and so those types are not considered. The call sequence...

...he same. I'd really like if I could have LLVM treat vec3 as vec4 but I haven't found out how. Currently the target has emulated support for vec3 through LLVM. Loads are already widened by LLVM to a vec4. Stores are kind of funny. By default LLVM sets the action to 'widen' but in GenWidenVectorStores what ends up happening is an 2:1 split of the vector that's less efficient in this case than actually widening the vector. The reason is that at this point the call to FindMemType assumes that stores can never be widened to a bigger type and so those types are not considered. The call sequence...

...h the same. I'd really like if I could have LLVM treat vec3 as vec4 but I haven't found out how. Currently the target has emulated support for vec3 through LLVM. Loads are already widened by LLVM to a vec4. Stores are kind of funny. By default LLVM sets the action to 'widen' but in GenWidenVectorStores what ends up happening is an 2:1 split of the vector that's less efficient in this case than actually widening the vector. The reason is that at this point the call to FindMemType assumes that stores can never be widened to a bigger type and so those types are not considered. The call sequence...

...me. I’d really like if I > could have LLVM treat vec3 as vec4 but I haven’t found out how. > > Currently the target has emulated support for vec3 through LLVM. Loads are > already widened by LLVM to a vec4. Stores are kind of funny. By default LLVM > sets the action to ‘widen’ but in GenWidenVectorStores what ends up happening is > an 2:1 split of the vector that’s less efficient in this case than actually > widening the vector. The reason is that at this point the call to FindMemType > assumes that stores can never be widened to a bigger type and so those types are > not considered. Th...

On Wed, May 20, 2009 at 4:55 PM, Dan Gohman <gohman at apple.com> wrote: > Can you explain why you chose the approach of using a new pass? > I pictured removing LegalizeDAG's type legalization code would > mostly consist of finding all the places that use TLI.getTypeAction > and just deleting code for handling its Expand and Promote. Are you > anticipating something more

On May 20, 2009, at 1:34 PM, Eli Friedman wrote: > On Wed, May 20, 2009 at 1:19 PM, Eli Friedman > <eli.friedman at gmail.com> wrote: > >> Per subject, this patch adding an additional pass to handle vector >> >> operations; the idea is that this allows removing the code from >> >> LegalizeDAG that handles illegal types, which should be a significant

...n. It takes - /// ST: store node that we want to replace - /// Chain: incoming store chain - /// BasePtr: base address of where we want to store into - SDValue StoreWidenVectorOp(StoreSDNode *ST, SDValue Chain, - SDValue BasePtr); - - /// Helper genWidenVectorStores - Helper function to generate a set of - /// stores to store a widen vector into non widen memory - // It takes - // StChain: list of chains for the stores we have generated - // Chain: incoming chain for the ld vector - // BasePtr: base pointer to load from - // SV: memory dis...