forked from OSchip/llvm-project
d85e347a28
For strided accesses the loop vectorizer seems to prefer creating a vector induction variable with a start value of the form <i32 0, i32 1, i32 2, ...>. This value will be incremented each loop iteration by a splat constant equal to the length of the vector. Within the loop, arithmetic using splat values will be done on this vector induction variable to produce indices for a vector GEP. This pass attempts to dig through the arithmetic back to the phi to create a new scalar induction variable and a stride. We push all of the arithmetic out of the loop by folding it into the start, step, and stride values. Then we create a scalar GEP to use as the base pointer for a strided load or store using the computed stride. Loop strength reduce will run after this pass and can do some cleanups to the scalar GEP and induction variable. Reviewed By: frasercrmck Differential Revision: https://reviews.llvm.org/D107790 |
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| .. | ||
| AnalysisWrappers.cpp | ||
| BreakpointPrinter.cpp | ||
| BreakpointPrinter.h | ||
| CMakeLists.txt | ||
| GraphPrinters.cpp | ||
| NewPMDriver.cpp | ||
| NewPMDriver.h | ||
| PassPrinters.cpp | ||
| PassPrinters.h | ||
| PrintSCC.cpp | ||
| opt.cpp | ||