[llvm] [X86][APX] Support APX + AMX-MOVRS/AMX-TRANSPOSE (PR #123267)

[Shengchen Kan via llvm-commits]

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@@ -1,5 +1,6 @@
 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
 ; RUN: llc < %s -O0 -mtriple=x86_64-unknown-unknown -mattr=+amx-tile,+amx-movrs | FileCheck %s
+; RUN: llc < %s -O0 -mtriple=x86_64-unknown-unknown -mattr=+amx-tile,+amx-movrs,+egpr --show-mc-encoding | FileCheck %s --check-prefix=APXF
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KanRobert wrote:

prefix=EGPR?

https://github.com/llvm/llvm-project/pull/123267