[clang] [llvm] [HLSL] Add matrix support to atan2 (PR #194984)

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<!--LLVM CODE FORMAT COMMENT: {clang-format}-->


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``````````bash
git-clang-format --diff origin/main HEAD --extensions h,cpp -- clang/lib/Headers/hlsl/hlsl_compat_overloads.h clang/lib/Sema/SemaHLSL.cpp llvm/lib/Target/SPIRV/SPIRVLegalizerInfo.cpp --diff_from_common_commit
``````````

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View the diff from clang-format here.
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``````````diff
diff --git a/clang/lib/Sema/SemaHLSL.cpp b/clang/lib/Sema/SemaHLSL.cpp
index 45134197e..99467ae00 100644
--- a/clang/lib/Sema/SemaHLSL.cpp
+++ b/clang/lib/Sema/SemaHLSL.cpp
@@ -3295,11 +3295,11 @@ static bool CheckFloatOrHalfRepresentation(Sema *S, SourceLocation Loc,
                                            clang::QualType PassedType) {
   clang::QualType BaseType = PassedType;
   if (const auto *VT = PassedType->getAs<clang::VectorType>()) {
-      BaseType = VT->getElementType();
+    BaseType = VT->getElementType();
   } else {
-      const auto *MT = PassedType->getAs<clang::MatrixType>()
-      assert(MT && "expected to be Vector or MatrixType");
-      BaseType = MT->getElementType();
+    const auto *MT = PassedType->getAs<clang::MatrixType>()
+                         assert(MT && "expected to be Vector or MatrixType");
+    BaseType = MT->getElementType();
   }
 
   if (!BaseType->isHalfType() && !BaseType->isFloat32Type())

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https://github.com/llvm/llvm-project/pull/194984