https://bugs.llvm.org/show_bug.cgi?id=45116
Bug ID: 45116
Summary: [DAGCombine] Replace some uses of getABITypeAlignment
with allowsMemoryAccess
Product: libraries
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: enhancement
Priority: P
Component: Common Code Generator Code
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected],
[email protected], [email protected],
[email protected], [email protected]
We are often using getABITypeAlignment to determine whether a merged load/store
is safe, which seems to be overkill as in most cases we aren't dealing with ABI
call requirements, we should be able to use allowsMemoryAccess (and maybe a
fast load check) instead.
DAGCombiner::CombineConsecutiveLoads
DAGCombiner::ReduceLoadOpStoreWidth
DAGCombiner::scalarizeExtractedVectorLoad
DAGCombiner::TransformFPLoadStorePair
LoadedSlice::canMergeExpensiveCrossRegisterBankCopy
This should be useful for platforms like x86 where unaligned scalar loads are
the norm.
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