[AArch64][SVE2] Add SVE2 target features to backend and TargetParser

Summary:
This patch adds the following features defined by Arm SVE2 architecture
extension:

  sve2, sve2-aes, sve2-sm4, sve2-sha3, bitperm

For existing CPUs these features are declared as unsupported to prevent
scheduler errors.

The specification can be found here:
https://developer.arm.com/docs/ddi0602/latest

Reviewers: SjoerdMeijer, sdesmalen, ostannard, rovka

Reviewed By: SjoerdMeijer, rovka

Subscribers: rovka, javed.absar, tschuett, kristof.beyls, kristina, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D61513

llvm-svn: 360573

1 files changed, 10 insertions, 0 deletions

diff --git a/llvm/lib/Support/AArch64TargetParser.cpp b/llvm/lib/Support/AArch64TargetParser.cpp
index faf8385c745..df4caa1f07f 100644
--- a/llvm/lib/Support/AArch64TargetParser.cpp
+++ b/llvm/lib/Support/AArch64TargetParser.cpp
@@ -88,6 +88,16 @@ bool AArch64::getExtensionFeatures(unsigned Extensions,
     Features.push_back("+rdm");
   if (Extensions & AEK_SVE)
     Features.push_back("+sve");
+  if (Extensions & AEK_SVE2)
+    Features.push_back("+sve2");
+  if (Extensions & AEK_SVE2AES)
+    Features.push_back("+sve2-aes");
+  if (Extensions & AEK_SVE2SM4)
+    Features.push_back("+sve2-sm4");
+  if (Extensions & AEK_SVE2SHA3)
+    Features.push_back("+sve2-sha3");
+  if (Extensions & AEK_BITPERM)
+    Features.push_back("+bitperm");
   if (Extensions & AEK_RCPC)
     Features.push_back("+rcpc");