[clang] [llvm] Adding splitdouble HLSL function (PR #109331)

[Farzon Lotfi via cfe-commits]

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@@ -1,5 +1,6 @@
 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
 ; RUN: opt -passes='function(scalarizer)' -S -mtriple=dxil-pc-shadermodel6.3-library %s | FileCheck %s
+; RUN: opt -passes='function(scalarizer),module(dxil-op-lower)' -S -mtriple=dxil-pc-shadermodel6.3-library %s | FileCheck %s --check-prefix=DXIL-LOWER
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farzonl wrote:

`test_vector_double_split_void` also needs a DXIL-LOWER prefix.

Also don't you want to test the scalar case?

https://github.com/llvm/llvm-project/pull/109331