[llvm] [AArch64] New subtarget features to control ldp and stp formation, fo… (PR #66098)

[David Green via llvm-commits]

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+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 3
+; RUN: llc < %s -O2 -mtriple=aarch64 -mcpu=ampere1 | FileCheck %s --check-prefixes=CHECK-LABEL,CHECK,CHECK-NEXT
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davemgreen wrote:

With --check-prefixes=CHECK, the CHECK-LABEL and CHECK-NEXT will be checked automatically too. The LABEL means to split the input into sections and the NEXT means it needs to be on the next line as the previous CHECK.

https://github.com/llvm/llvm-project/pull/66098