https://llvm.org/bugs/show_bug.cgi?id=30258
Bug ID: 30258
Summary: [SLP][AArch64] Implement cost model for intrinsics.
Product: libraries
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: Backend: AArch64
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
Classification: Unclassified
In r270537, Simon added the framework for an intrinsic cost model in the X86
backend. We should consider doing the same for AArch64 as this may expose
opportunities in the SLP vectorizer.
Currently, X86 supports bitreverse, bswap, ctlz, ctpop, and cttz. I want to
say AArch64 has support for most of these in vector form. However, I don't
know how well the AArch64 backend handles the lowering of these intrinsics.
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