[llvm] [LV] Teach LoopVectorizationLegality about struct vector calls (PR #119221)

[David Sherwood via llvm-commits]

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+; RUN: opt < %s -passes=loop-vectorize,dce,instcombine -force-vector-width=2 -force-vector-interleave=1 -S | FileCheck %s
+; RUN: opt < %s -passes=loop-vectorize,dce,instcombine -force-vector-width=2 -force-vector-interleave=1 -pass-remarks-analysis=loop-vectorize  -disable-output -S 2>&1 | FileCheck %s --check-prefix=CHECK-REMARKS
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david-arm wrote:

See comments in the other test file, which also apply here.

https://github.com/llvm/llvm-project/pull/119221