[llvm] [llvm][AArch64][Assembly]: Add LUT assembly/disassembly. (PR #70802)

[via llvm-commits]

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@@ -0,0 +1,22 @@
+// RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2,+sme-lutv2 < %s \
+// RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
+// RUN: not llvm-mc -triple=aarch64 -show-encoding < %s 2>&1 \
+// RUN:        | FileCheck %s --check-prefix=CHECK-ERROR
+// RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2,+sme-lutv2 < %s \
+// RUN:        | llvm-objdump -d --mattr=+sme2,+sme-lutv2 --no-print-imm-hex - \
+// RUN:        | FileCheck %s --check-prefix=CHECK-INST
+// RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2,+sme-lutv2 < %s \
+// RUN:        | llvm-objdump -d --mattr=-sme-lutv2 --no-print-imm-hex - \
+// RUN:        | FileCheck %s --check-prefix=CHECK-UNKNOWN
----------------
CarolineConcatto wrote:

Can you add this line of test:

```
// Disassemble encoding and check the re-encoding (-show-encoding) matches.
// RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2,+sme2p1,+sme-lutv2 < %s \
// RUN:        | sed '/.text/d' | sed 's/.*encoding: //g' \
// RUN:        | llvm-mc -triple=aarch64 -mattr=+sme2,+sme2p1,+sme-lutv2 -disassemble -show-encoding \
// RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
```

https://github.com/llvm/llvm-project/pull/70802