Thurston Dang 51d8255203 [msan] Handle Arm NEON saturating extract and narrow (#125742) ...

This handles NEON saturating extract and narrow (Intrinsic::aarch64_neon_{sqxtn, sqxtun, uqxtn}) by (ab)using handleShadowOr() to perform the shadow cast. Previously, these were unknown intrinsics handled suboptimally by visitInstruction.

Updates the tests from https://github.com/llvm/llvm-project/pull/125288 and https://github.com/llvm/llvm-project/pull/125140

2025-02-12 16:22:49 -08:00

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