Amara Emerson 13af1ed8e3 [GlobalISel] Support for inlining memcpy, memset and memmove calls. ...

This introduces a new family of combiner helper routines that re-use the
target specific cost model from SelectionDAG, and generate inline implementations
of the memcpy family of intrinsics.

The combines are only enabled at optimization levels higher than -O0, and give
very substantial performance improvements.

Differential Revision: https://reviews.llvm.org/D65167

llvm-svn: 366951

2019-07-24 22:17:31 +00:00

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