llvm-project

b0091732 - [clang][bytecode][HLSL][Matrix] Support `ConstantMatrixType` and more HLSL casts in the new constant interpreter for basic matrix constexpr evaluation in HLSL (#184840)

[clang][bytecode][HLSL][Matrix] Support `ConstantMatrixType` and more HLSL casts in the new constant interpreter for basic matrix constexpr evaluation in HLSL (#184840) Forgot to change the target branch before merging. This PR is a cherry-pick of the squashed-and-merged PR commit b16aa4b7ec665911c74300cd7442659b70973d13 from 183424 This PR fixes #182963 This PR is an extension of #178762 which has already been merged. This PR adds support for `ConstantMatrixType` and the HLSL casts `CK_HLSLArrayRValue`, `CK_HLSLMatrixTruncation`, `CK_HLSLAggregateSplatCast`, and `CK_HLSLElementwiseCast` to the bytecode constexpr evaluator. The implementations of CK_HLSLAggregateSplatCast and CK_HLSLElementwiseCast are incomplete, as they still need to support struct and array types to enable use of the experimental new constant interpreter on other existing HLSL constexpr tests. The completion of the implementations of these casts will be tracked in a separate issue (#183426) and implemented in a separate PR. Assisted-by: claude-opus-4.6