[AArch64] Define __ARM_FEATURE_{CRC32,ATOMICS}

[avieira]

Summary

Hi all,

This patch implements the definition of ARM_FEATURE_ATOMICS and fixes the missing definition of ARM_FEATURE_CRC32 for Armv8.1-A.

Kind regards,
Andre

[chill]

LGTM, thanks.

[avieira]

Rebased on top of trunk.

clang/lib/Basic/Targets/AArch64.h

class LLVM_LIBRARY_VISIBILITY AArch64TargetInfo : public TargetInfo {
   bool HasMTE;
   bool HasTME;
   bool HasMatMul;
   bool HasSVE2;
   bool HasSVE2AES;
   bool HasSVE2SHA3;
   bool HasSVE2SM4;
   bool HasSVE2BitPerm;
+  bool HasLSE;
 
   llvm::AArch64::ArchKind ArchKind;
 
   static const Builtin::Info BuiltinInfo[];
 
   std::string ABI;
 
 public:

clang/lib/Basic/Targets/AArch64.cpp

 
 void AArch64TargetInfo::fillValidCPUList(
     SmallVectorImpl<StringRef> &Values) const {
   llvm::AArch64::fillValidCPUArchList(Values);
 }
 
 void AArch64TargetInfo::getTargetDefinesARMV81A(const LangOptions &Opts,
                                                 MacroBuilder &Builder) const {
-  // FIXME: Armv8.1 makes __ARM_FEATURE_CRC32 mandatory. Handle it here.
   Builder.defineMacro("__ARM_FEATURE_QRDMX", "1");
+  Builder.defineMacro("__ARM_FEATURE_ATOMICS", "1");
+  Builder.defineMacro("__ARM_FEATURE_CRC32", "1");
 }
 
 void AArch64TargetInfo::getTargetDefinesARMV82A(const LangOptions &Opts,
                                                 MacroBuilder &Builder) const {
   // Also include the ARMv8.1 defines
   getTargetDefinesARMV81A(Opts, Builder);
 }
 
 void AArch64TargetInfo::getTargetDefinesARMV83A(const LangOptions &Opts,
                                                 MacroBuilder &Builder) const {
   Builder.defineMacro("__ARM_FEATURE_COMPLEX", "1");
   Builder.defineMacro("__ARM_FEATURE_JCVT", "1");
   // Also include the Armv8.2 defines
   getTargetDefinesARMV82A(Opts, Builder);
 }
 
 void AArch64TargetInfo::getTargetDefinesARMV84A(const LangOptions &Opts,
                                                 MacroBuilder &Builder) const {
   // Also include the Armv8.3 defines
-  // FIXME: Armv8.4 makes __ARM_FEATURE_ATOMICS, defined in GCC, mandatory.
-  // Add and handle it here.
   getTargetDefinesARMV83A(Opts, Builder);
 }
 
 void AArch64TargetInfo::getTargetDefinesARMV85A(const LangOptions &Opts,
                                                 MacroBuilder &Builder) const {
   // Also include the Armv8.4 defines
   getTargetDefinesARMV84A(Opts, Builder);
 }
if (HasMTE)
     Builder.defineMacro("__ARM_FEATURE_MEMORY_TAGGING", "1");
 
   if (HasTME)
     Builder.defineMacro("__ARM_FEATURE_TME", "1");
 
   if (HasMatMul)
     Builder.defineMacro("__ARM_FEATURE_MATMUL_INT8", "1");
 
+  if (HasLSE)
+    Builder.defineMacro("__ARM_FEATURE_ATOMICS", "1");
+
   if (HasBFloat16) {
     Builder.defineMacro("__ARM_FEATURE_BF16", "1");
     Builder.defineMacro("__ARM_FEATURE_BF16_VECTOR_ARITHMETIC", "1");
     Builder.defineMacro("__ARM_BF16_FORMAT_ALTERNATIVE", "1");
   }
 
   if ((FPU & NeonMode) && HasFP16FML)
     Builder.defineMacro("__ARM_FEATURE_FP16FML", "1");
bool AArch64TargetInfo::handleTargetFeatures(std::vector<std::string> &Features,
   HasTME = false;
   HasMatMul = false;
   HasBFloat16 = false;
   HasSVE2 = false;
   HasSVE2AES = false;
   HasSVE2SHA3 = false;
   HasSVE2SM4 = false;
   HasSVE2BitPerm = false;
+  HasLSE = false;
 
   ArchKind = llvm::AArch64::ArchKind::ARMV8A;
 
   for (const auto &Feature : Features) {
     if (Feature == "+neon")
       FPU |= NeonMode;
     if (Feature == "+sve") {
       FPU |= SveMode;
for (const auto &Feature : Features) {
     if (Feature == "+mte")
       HasMTE = true;
     if (Feature == "+tme")
       HasTME = true;
     if (Feature == "+i8mm")
       HasMatMul = true;
     if (Feature == "+bf16")
       HasBFloat16 = true;
+    if (Feature == "+lse")
+      HasLSE = true;
   }
 
   setDataLayout();
 
   return true;
 }
 
 TargetInfo::CallingConvCheckResult

clang/test/Preprocessor/aarch64-target-features.c

 // RUN: %clang -target aarch64-none-linux-gnu -march=armv8-a+crypto -x c -E -dM %s -o - | FileCheck --check-prefix=CHECK-CRYPTO %s
 // RUN: %clang -target arm64-none-linux-gnu -march=armv8-a+crypto -x c -E -dM %s -o - | FileCheck --check-prefix=CHECK-CRYPTO %s
 // CHECK-CRYPTO: __ARM_FEATURE_CRYPTO 1
 
 // RUN: %clang -target aarch64-none-linux-gnu -mcrc -x c -E -dM %s -o - | FileCheck --check-prefix=CHECK-CRC32 %s
 // RUN: %clang -target arm64-none-linux-gnu -mcrc -x c -E -dM %s -o - | FileCheck --check-prefix=CHECK-CRC32 %s
 // RUN: %clang -target aarch64-none-linux-gnu -march=armv8-a+crc -x c -E -dM %s -o - | FileCheck --check-prefix=CHECK-CRC32 %s
 // RUN: %clang -target arm64-none-linux-gnu -march=armv8-a+crc -x c -E -dM %s -o - | FileCheck --check-prefix=CHECK-CRC32 %s
+// RUN: %clang -target aarch64-none-linux-gnu -march=armv8.1-a -x c -E -dM %s -o - | FileCheck --check-prefix=CHECK-CRC32 %s
+// RUN: %clang -target arm64-none-linux-gnu -march=armv8.1-a -x c -E -dM %s -o - | FileCheck --check-prefix=CHECK-CRC32 %s
 // CHECK-CRC32: __ARM_FEATURE_CRC32 1
 
 // RUN: %clang -target aarch64-none-linux-gnu -fno-math-errno -fno-signed-zeros\
 // RUN:        -fno-trapping-math -fassociative-math -freciprocal-math\
 // RUN:        -x c -E -dM %s -o - | FileCheck --check-prefix=CHECK-FASTMATH %s
 // RUN: %clang -target aarch64-none-linux-gnu -ffast-math -x c -E -dM %s -o - | FileCheck --check-prefix=CHECK-FASTMATH %s
 // RUN: %clang -target arm64-none-linux-gnu -ffast-math -x c -E -dM %s -o - | FileCheck --check-prefix=CHECK-FASTMATH %s
 // CHECK-FASTMATH: __ARM_FP_FAST 1

 // CHECK-BTI:         #define __ARM_FEATURE_BTI_DEFAULT 1
 
 // ================== Check BFloat16 Extensions.
 // RUN: %clang -target aarch64-arm-none-eabi -march=armv8.6-a+bf16 -x c -E -dM %s -o - 2>&1 | FileCheck -check-prefix=CHECK-BFLOAT %s
 // CHECK-BFLOAT: __ARM_BF16_FORMAT_ALTERNATIVE 1
 // CHECK-BFLOAT: __ARM_FEATURE_BF16 1
 // CHECK-BFLOAT: __ARM_FEATURE_BF16_VECTOR_ARITHMETIC 1
 
+// ================== Check Largse System Extensions (LSE)
+// RUN: %clang -target aarch64-none-linux-gnu -march=armv8-a+lse -x c -E -dM %s -o - | FileCheck --check-prefix=CHECK-LSE %s
+// RUN: %clang -target arm64-none-linux-gnu -march=armv8-a+lse -x c -E -dM %s -o - | FileCheck --check-prefix=CHECK-LSE %s
+// RUN: %clang -target aarch64-none-linux-gnu -march=armv8.1-a -x c -E -dM %s -o - | FileCheck --check-prefix=CHECK-LSE %s
+// RUN: %clang -target arm64-none-linux-gnu -march=armv8.1-a -x c -E -dM %s -o - | FileCheck --check-prefix=CHECK-LSE %s
+// CHECK-LSE: __ARM_FEATURE_ATOMICS 1