[llvm] [NFC][AArch64] Tests for guarding unrolling with scalable vec ins/ext (PR #81132)

[David Green via llvm-commits]

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+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 3
+; RUN: opt -passes=loop-unroll,simplifycfg -S -mtriple aarch64 -mattr=+sve -aarch64-sve-vector-bits-min=128 %s | FileCheck %s -check-prefix=UNROLL-128
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davemgreen wrote:

Could you test the cost of the intrinsics more directly, like the tests in llvm/test/Analysis/CostModel/AArch64/sve-intrinsics.ll or llvm/test/Analysis/CostModel/AArch64/splice.ll?

https://github.com/llvm/llvm-project/pull/81132