[PATCH] D127802: [HLSL] Support HLSL vector initializers

[Chris Bieneman via Phabricator via cfe-commits]

beanz created this revision.
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In HLSL vectors are ext_vectors in all respects except that they
support a constructor style syntax for initializing vectors. This
change adds a translation of vector constructor arguments into
initializer lists.

This supports two oddities of HLSL syntax:
(1) HLSL vectors support constructor syntax
(2) HLSL vectors are expanded to constituate components in constructors


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D127802

Files:
  clang/lib/Sema/SemaInit.cpp
  clang/test/SemaHLSL/BuiltIns/vector-constructors-erros.hlsl
  clang/test/SemaHLSL/BuiltIns/vector-constructors.hlsl

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