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2882ed164e
As mentioned on PR30845, we were performing our vXi64 multiplication as: AloBlo = pmuludq(a, b); AloBhi = pmuludq(a, psrlqi(b, 32)); AhiBlo = pmuludq(psrlqi(a, 32), b); return AloBlo + psllqi(AloBhi, 32)+ psllqi(AhiBlo, 32); when we could avoid one of the upper shifts with: AloBlo = pmuludq(a, b); AloBhi = pmuludq(a, psrlqi(b, 32)); AhiBlo = pmuludq(psrlqi(a, 32), b); return AloBlo + psllqi(AloBhi + AhiBlo, 32); This matches the lowering on gcc/icc. Differential Revision: https://reviews.llvm.org/D27756 llvm-svn: 290267 |
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AliasSet | ||
AssumptionCache | ||
BasicAA | ||
BlockFrequencyInfo | ||
BranchProbabilityInfo | ||
CallGraph | ||
CFLAliasAnalysis | ||
ConstantFolding | ||
CostModel | ||
Delinearization | ||
DemandedBits | ||
DependenceAnalysis | ||
DivergenceAnalysis | ||
DominanceFrontier | ||
Dominators | ||
GlobalsModRef | ||
LazyCallGraph | ||
Lint | ||
LoopAccessAnalysis | ||
LoopInfo | ||
MemoryDependenceAnalysis | ||
PostDominators | ||
ProfileSummary | ||
RegionInfo | ||
ScalarEvolution | ||
ScopedNoAliasAA | ||
TypeBasedAliasAnalysis | ||
ValueTracking | ||
alias-analysis-uses.ll |