[PATCH] D106860: [clang][AArch64][SVE] Avoid going through memory for fixed/scalable predicate casts

[Bradley Smith via Phabricator via cfe-commits]

bsmith created this revision.
bsmith added reviewers: paulwalker-arm, peterwaller-arm, eli.friedman, junparser.
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bsmith requested review of this revision.
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For fixed SVE types, predicates are represented using vectors of i8,
where as for scalable types they are represented using vectors of i1. We
can avoid going through memory for casts between these by bitcasting the
i1 scalable vectors to/from a scalable i8 vector of matching size, which
can then use the existing vector insert/extract logic.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D106860

Files:
  clang/lib/CodeGen/CGCall.cpp
  clang/lib/CodeGen/CGExprScalar.cpp
  clang/test/CodeGen/attr-arm-sve-vector-bits-bitcast.c
  clang/test/CodeGen/attr-arm-sve-vector-bits-call.c
  clang/test/CodeGen/attr-arm-sve-vector-bits-cast.c
  clang/test/CodeGen/attr-arm-sve-vector-bits-codegen.c
  clang/test/CodeGen/attr-arm-sve-vector-bits-globals.c

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