[AArch64] clang support for Armv8.8/9.3 MOPS

This introduces clang command line support for the new Armv8.8-A and
Armv9.3-A instructions for standardising memcpy, memset and memmove
operations, which was previously introduced into LLVM in
https://reviews.llvm.org/D116157.

Patch by Lucas Prates, Tomas Matheson and Son Tuan Vu.

Differential Revision: https://reviews.llvm.org/D117271

Author: pratlucas

clang/lib/Basic/Targets/AArch64.cpp

@@ -544,6 +544,7 @@ bool AArch64TargetInfo::handleTargetFeatures(std::vector<std::string> &Features,
   HasMatmulFP32 = false;
   HasLSE = false;
   HasHBC = false;
+  HasMOPS = false;
 
   ArchKind = llvm::AArch64::ArchKind::INVALID;
 

clang/lib/Basic/Targets/AArch64.h

@@ -54,6 +54,7 @@ class LLVM_LIBRARY_VISIBILITY AArch64TargetInfo : public TargetInfo {
   bool HasLSE;
   bool HasFlagM;
   bool HasHBC;
+  bool HasMOPS;
 
   llvm::AArch64::ArchKind ArchKind;
 

clang/test/Driver/aarch64-mops.c

@@ -0,0 +1,6 @@
+// Test that target feature mops is implemented and available correctly
+// RUN: %clang -### -target aarch64-none-none-eabi -march=armv8.8-a+mops %s 2>&1 | FileCheck %s
+// CHECK: "-target-feature" "+mops"
+
+// RUN: %clang -### -target aarch64-none-none-eabi -march=armv8.8-a+nomops %s 2>&1 | FileCheck %s --check-prefix=NO_MOPS
+// NO_MOPS: "-target-feature" "-mops"

llvm/include/llvm/Support/AArch64TargetParser.def

@@ -145,6 +145,7 @@ AARCH64_ARCH_EXT_NAME("sme",          AArch64::AEK_SME,         "+sme",
 AARCH64_ARCH_EXT_NAME("sme-f64",      AArch64::AEK_SMEF64,      "+sme-f64",      "-sme-f64")
 AARCH64_ARCH_EXT_NAME("sme-i64",      AArch64::AEK_SMEI64,      "+sme-i64",      "-sme-i64")
 AARCH64_ARCH_EXT_NAME("hbc",          AArch64::AEK_HBC,         "+hbc",          "-hbc")
+AARCH64_ARCH_EXT_NAME("mops",         AArch64::AEK_MOPS,        "+mops",         "-mops")
 #undef AARCH64_ARCH_EXT_NAME
 
 #ifndef AARCH64_CPU_NAME

llvm/include/llvm/Support/AArch64TargetParser.h

@@ -70,6 +70,7 @@ enum ArchExtKind : uint64_t {
   AEK_SMEF64 =      1ULL << 38,
   AEK_SMEI64 =      1ULL << 39,
   AEK_HBC =         1ULL << 40,
+  AEK_MOPS =        1ULL << 41,
 };
 
 enum class ArchKind {

llvm/lib/Support/AArch64TargetParser.cpp

@@ -116,6 +116,8 @@ bool AArch64::getExtensionFeatures(uint64_t Extensions,
     Features.push_back("+sme-i64");
   if (Extensions & AArch64::AEK_HBC)
     Features.push_back("+hbc");
+  if (Extensions & AArch64::AEK_MOPS)
+    Features.push_back("+mops");
 
   return true;
 }

llvm/unittests/Support/TargetParserTest.cpp

@@ -1519,6 +1519,7 @@ TEST(TargetParserTest, AArch64ArchExtFeature) {
       {"sme-f64", "nosme-f64", "+sme-f64", "-sme-f64"},
       {"sme-i64", "nosme-i64", "+sme-i64", "-sme-i64"},
       {"hbc", "nohbc", "+hbc", "-hbc"},
+      {"mops", "nomops", "+mops", "-mops"},
   };
 
   for (unsigned i = 0; i < array_lengthof(ArchExt); i++) {