From d4d4da74a698588f12e885989175cccf97a5633e Mon Sep 17 00:00:00 2001
From: Renato Golin <renato.golin@linaro.org>
Date: Wed, 25 May 2016 12:02:58 +0000
Subject: [PATCH] [AArch64] Using new TargetParser in Clang

Using AArch64TargetParser in clang to avoid repetitive string parsing.

Use TargetParser to do ARCH/CPU/ArchExt parsing instead of local implementation.

Patch by Jojo Ma.

llvm-svn: 270688
---
 clang/lib/Basic/Targets.cpp | 12 +++------
 clang/lib/Driver/Tools.cpp  | 54 +++++++++++--------------------------
 2 files changed, 19 insertions(+), 47 deletions(-)

diff --git a/clang/lib/Basic/Targets.cpp b/clang/lib/Basic/Targets.cpp
index 4d06ebb724bd..059dd62aea11 100644
--- a/clang/lib/Basic/Targets.cpp
+++ b/clang/lib/Basic/Targets.cpp
@@ -5665,14 +5665,10 @@ public:
   }
 
   bool setCPU(const std::string &Name) override {
-    bool CPUKnown = llvm::StringSwitch<bool>(Name)
-                        .Case("generic", true)
-                        .Cases("cortex-a53", "cortex-a57", "cortex-a72",
-                               "cortex-a35", "exynos-m1", true)
-                        .Case("cyclone", true)
-                        .Case("kryo", true)
-                        .Default(false);
-    return CPUKnown;
+    if (Name == "generic" || llvm::AArch64::parseCPUArch(Name) != llvm::ARM::AK_INVALID)
+      return true;
+
+    return false;
   }
 
   void getTargetDefines(const LangOptions &Opts,
diff --git a/clang/lib/Driver/Tools.cpp b/clang/lib/Driver/Tools.cpp
index 7c363e0d9ef8..f4d234907f28 100644
--- a/clang/lib/Driver/Tools.cpp
+++ b/clang/lib/Driver/Tools.cpp
@@ -2262,22 +2262,9 @@ static bool DecodeAArch64Features(const Driver &D, StringRef text,
   text.split(Split, StringRef("+"), -1, false);
 
   for (StringRef Feature : Split) {
-    const char *result = llvm::StringSwitch<const char *>(Feature)
-                             .Case("fp", "+fp-armv8")
-                             .Case("simd", "+neon")
-                             .Case("crc", "+crc")
-                             .Case("crypto", "+crypto")
-                             .Case("fp16", "+fullfp16")
-                             .Case("profile", "+spe")
-                             .Case("nofp", "-fp-armv8")
-                             .Case("nosimd", "-neon")
-                             .Case("nocrc", "-crc")
-                             .Case("nocrypto", "-crypto")
-                             .Case("nofp16", "-fullfp16")
-                             .Case("noprofile", "-spe")
-                             .Default(nullptr);
-    if (result)
-      Features.push_back(result);
+    const char *FeatureName = llvm::AArch64::getArchExtFeature(Feature);
+    if (FeatureName)
+      Features.push_back(FeatureName);
     else if (Feature == "neon" || Feature == "noneon")
       D.Diag(diag::err_drv_no_neon_modifier);
     else
@@ -2292,20 +2279,16 @@ static bool DecodeAArch64Mcpu(const Driver &D, StringRef Mcpu, StringRef &CPU,
                               std::vector<const char *> &Features) {
   std::pair<StringRef, StringRef> Split = Mcpu.split("+");
   CPU = Split.first;
-  if (CPU == "cortex-a53" || CPU == "cortex-a57" ||
-      CPU == "cortex-a72" || CPU == "cortex-a35" || CPU == "exynos-m1" ||
-      CPU == "kryo") {
-    Features.push_back("+neon");
-    Features.push_back("+crc");
-    Features.push_back("+crypto");
-  } else if (CPU == "cyclone") {
-    Features.push_back("+neon");
-    Features.push_back("+crypto");
-  } else if (CPU == "generic") {
+
+  if (CPU == "generic") {
     Features.push_back("+neon");
   } else {
-    return false;
-  }
+    unsigned ArchKind = llvm::AArch64::parseCPUArch(CPU);
+    unsigned Extersion = llvm::AArch64::getDefaultExtensions(CPU,ArchKind);
+
+    if (!llvm::AArch64::getExtensionFeatures(Extersion,Features))
+      return false;
+   }
 
   if (Split.second.size() && !DecodeAArch64Features(D, Split.second, Features))
     return false;
@@ -2317,20 +2300,13 @@ static bool
 getAArch64ArchFeaturesFromMarch(const Driver &D, StringRef March,
                                 const ArgList &Args,
                                 std::vector<const char *> &Features) {
+  unsigned ArchKind;
   std::string MarchLowerCase = March.lower();
   std::pair<StringRef, StringRef> Split = StringRef(MarchLowerCase).split("+");
 
-  if (Split.first == "armv8-a" || Split.first == "armv8a") {
-    // ok, no additional features.
-  } else if (Split.first == "armv8.1-a" || Split.first == "armv8.1a") {
-    Features.push_back("+v8.1a");
-  } else if (Split.first == "armv8.2-a" || Split.first == "armv8.2a" ) {
-    Features.push_back("+v8.2a");
-  } else {
-    return false;
-  }
-
-  if (Split.second.size() && !DecodeAArch64Features(D, Split.second, Features))
+  ArchKind = llvm::AArch64::parseArch(Split.first);
+  if (ArchKind == llvm::ARM::AK_INVALID || !llvm::AArch64::getArchFeatures(ArchKind, Features) ||
+     (Split.second.size() && !DecodeAArch64Features(D, Split.second, Features)))
     return false;
 
   return true;