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3 Commits

Author SHA1 Message Date
Matt Arsenault 754511fb00 InferAddressSpaces: Search constant expressions for addrspacecasts 
These are pretty common when using local memory, and the 64-bit generic
addressing is much more expensive to compute.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@301711 91177308-0d34-0410-b5e6-96231b3b80d8
 2017-04-28 22:52:41 +00:00
Matt Arsenault afc9030f67 InferAddressSpaces: Infer from just addrspacecasts 
Eliminates some more cases where some subset of the addressing
computation remains flat. Some cases with addrspacecasts
in nested constant expressions are still left behind however.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@301704 91177308-0d34-0410-b5e6-96231b3b80d8
 2017-04-28 22:18:08 +00:00
Matt Arsenault cfadbaaf1a InferAddressSpaces: Infer for just GEPs 
Fixes leaving intermediate flat addressing computations
where a GEP instruction's source is a constant expression.

Still leaves behind a trivial addrspacecast + gep pair that
instcombine is able to handle, which ideally could be folded
here directly.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@301044 91177308-0d34-0410-b5e6-96231b3b80d8
 2017-04-21 21:35:04 +00:00