[llvm] [AArch64][llvm] Update Armv9.7-A dependencies (PR #185034)

[Jonathan Thackray via llvm-commits]

https://github.com/jthackray created https://github.com/llvm/llvm-project/pull/185034

Update Armv9.7-A dependenies:
  * `FeatureF16MM` to depend on `FeatureNEON`
  * `FeatureF16F32DOT` enabled by default for Armv9.7-A

>From 8ae1cf3b66d48e196c59c50248e5bca8b28440a5 Mon Sep 17 00:00:00 2001
From: Jonathan Thackray <jonathan.thackray at arm.com>
Date: Fri, 6 Mar 2026 16:25:10 +0000
Subject: [PATCH] [AArch64][llvm] Update Armv9.7-A dependencies

Update Armv9.7-A dependenies:
  * `FeatureF16MM` to depend on `FeatureNEON`
  * `FeatureF16F32DOT` enabled by default for Armv9.7-A
---
 llvm/lib/Target/AArch64/AArch64Features.td       | 7 ++++---
 llvm/unittests/TargetParser/TargetParserTest.cpp | 3 +++
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/llvm/lib/Target/AArch64/AArch64Features.td b/llvm/lib/Target/AArch64/AArch64Features.td
index faee640a910d0..68924644c1216 100644
--- a/llvm/lib/Target/AArch64/AArch64Features.td
+++ b/llvm/lib/Target/AArch64/AArch64Features.td
@@ -609,7 +609,7 @@ def FeatureSVE_B16MM : ExtensionWithMArch<"sve-b16mm", "SVE_B16MM", "FEAT_SVE_B1
   "Enable Armv9.7-A SVE non-widening BFloat16 matrix multiply-accumulate", [FeatureSVE]>;
 
 def FeatureF16MM : ExtensionWithMArch<"f16mm", "F16MM", "FEAT_F16MM",
-  "Enable Armv9.7-A non-widening half-precision matrix multiply-accumulate", [FeatureFullFP16]>;
+  "Enable Armv9.7-A non-widening half-precision matrix multiply-accumulate", [FeatureFullFP16, FeatureNEON]>;
 
 def FeatureF16F32DOT : ExtensionWithMArch<"f16f32dot", "F16F32DOT", "FEAT_F16F32DOT",
   "Enable Armv9.7-A Advanced SIMD half-precision dot product accumulate to single-precision", [FeatureNEON, FeatureFullFP16]>;
@@ -1013,8 +1013,9 @@ def HasV9_6aOps : Architecture64<9, 6, "a", "v9.6a",
   !listconcat(HasV9_5aOps.DefaultExts, [FeatureCMPBR,
     FeatureLSUI, FeatureOCCMO])>;
 def HasV9_7aOps : Architecture64<9, 7, "a", "v9.7a",
-  [HasV9_6aOps, FeatureSVE2p3, FeatureFPRCVT],
-  !listconcat(HasV9_6aOps.DefaultExts, [FeatureSVE2p3, FeatureFPRCVT])>;
+  [HasV9_6aOps, FeatureSVE2p3, FeatureFPRCVT, FeatureF16F32DOT],
+  !listconcat(HasV9_6aOps.DefaultExts, [FeatureSVE2p3, FeatureFPRCVT,
+    FeatureF16F32DOT])>;
 def HasV8_0rOps : Architecture64<8, 0, "r", "v8r",
   [ //v8.1
     FeatureCRC, FeaturePAN, FeatureLSE, FeatureCONTEXTIDREL2,
diff --git a/llvm/unittests/TargetParser/TargetParserTest.cpp b/llvm/unittests/TargetParser/TargetParserTest.cpp
index 8cd6cda9a1ed9..835c9415dffa1 100644
--- a/llvm/unittests/TargetParser/TargetParserTest.cpp
+++ b/llvm/unittests/TargetParser/TargetParserTest.cpp
@@ -1908,6 +1908,7 @@ AArch64ExtensionDependenciesBaseArchTestParams
          {"v8.1a", "crc", "fp-armv8", "lse", "rdm", "neon"},
          {}},
         {AArch64::ARMV9_5A, {}, {"v9.5a", "mops", "cpa"}, {}},
+        {AArch64::ARMV9_7A, {}, {"v9.7a", "f16f32dot"}, {}},
 
         // Positive modifiers
         {AArch64::ARMV8A, {"fp16"}, {"fullfp16"}, {}},
@@ -2023,6 +2024,8 @@ AArch64ExtensionDependenciesBaseArchTestParams
         {AArch64::ARMV8A, {"sve", "nofp16"}, {}, {"fullfp16", "sve"}},
         {AArch64::ARMV9_7A, {"nofp16", "f16mm"}, {"fullfp16", "f16mm"}, {}},
         {AArch64::ARMV9_7A, {"f16mm", "nofp16"}, {}, {"fullfp16", "f16mm"}},
+        {AArch64::ARMV9_7A, {"nosimd", "f16mm"}, {"neon", "f16mm"}, {}},
+        {AArch64::ARMV9_7A, {"f16mm", "nosimd"}, {}, {"neon", "f16mm"}},
         {AArch64::ARMV9_7A,
          {"nofp16", "f16f32mm"},
          {"fullfp16", "f16f32mm"},