From bf91fbab3afced08cac75bfcc93cf26109113962 Mon Sep 17 00:00:00 2001
From: Eric Christopher <echristo@gmail.com>
Date: Tue, 1 Sep 2015 22:37:03 +0000
Subject: [PATCH] Revert "Migrate the target attribute parsing code into an
 extension off of"

This is failing in release mode. Revert while I figure out what's happening.

This reverts commit r246596.

llvm-svn: 246598
---
 clang/include/clang/Basic/Attr.td | 47 +------------------------------
 clang/lib/CodeGen/CGCall.cpp      | 33 ++++++++++++++++++----
 2 files changed, 28 insertions(+), 52 deletions(-)

diff --git a/clang/include/clang/Basic/Attr.td b/clang/include/clang/Basic/Attr.td
index 37d06f267dae..6f10ee62723d 100644
--- a/clang/include/clang/Basic/Attr.td
+++ b/clang/include/clang/Basic/Attr.td
@@ -1315,54 +1315,9 @@ def Pascal : InheritableAttr {
 
 def Target : InheritableAttr {
   let Spellings = [GCC<"target">];
-  let Args = [StringArgument<"featuresStr">];
+  let Args = [StringArgument<"features">];
   let Subjects = SubjectList<[Function], ErrorDiag>;
   let Documentation = [TargetDocs];
-  let AdditionalMembers = [{
-    StringRef CPU;
-    std::vector<std::string> Features;
-    bool Parsed;
-    StringRef getCPU() {
-       if (!Parsed)
-         parse();
-       return CPU;
-    }
-    std::vector<std::string> &getFeatures() {
-       if (!Parsed)
-         parse();
-       return Features;
-    }
-    void parse() {
-      StringRef FeaturesStr = getFeaturesStr();
-      SmallVector<StringRef, 1> AttrFeatures;
-      FeaturesStr.split(AttrFeatures, ",");
-
-      // Grab the various features and prepend a "+" to turn on the feature to
-      // the backend and add them to our existing set of features.
-      for (auto &Feature : AttrFeatures) {
-        // Go ahead and trim whitespace rather than either erroring or
-        // accepting it weirdly.
-        Feature = Feature.trim();
-
-        // While we're here iterating check for a different target cpu.
-        if (Feature.startswith("arch="))
-          CPU = Feature.split("=").second.trim();
-        else if (Feature.startswith("tune="))
-          // We don't support cpu tuning this way currently.
-          ;
-        else if (Feature.startswith("fpmath="))
-          // TODO: Support the fpmath option this way. It will require checking
-          // overall feature validity for the function with the rest of the
-          // attributes on the function.
-          ;
-        else if (Feature.startswith("no-"))
-          Features.push_back("-" + Feature.split("-").second.str());
-        else
-          Features.push_back("+" + Feature.str());
-      }
-      Parsed = true;
-    }
-  }];
 }
 
 def TransparentUnion : InheritableAttr {
diff --git a/clang/lib/CodeGen/CGCall.cpp b/clang/lib/CodeGen/CGCall.cpp
index ed7bf60c024c..270d9941ec8a 100644
--- a/clang/lib/CodeGen/CGCall.cpp
+++ b/clang/lib/CodeGen/CGCall.cpp
@@ -1499,19 +1499,40 @@ void CodeGenModule::ConstructAttributeList(const CGFunctionInfo &FI,
     const FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(TargetDecl);
     if (FD && FD->hasAttr<TargetAttr>()) {
       llvm::StringMap<bool> FeatureMap;
-      auto *TD = FD->getAttr<TargetAttr>();
+      const auto *TD = FD->getAttr<TargetAttr>();
 
       // Make a copy of the features as passed on the command line.
       std::vector<std::string> FnFeatures =
           getTarget().getTargetOpts().FeaturesAsWritten;
 
-      std::vector<std::string> &AttrFeatures = TD->getFeatures();
-      std::copy(AttrFeatures.begin(), AttrFeatures.end(),
-                std::back_inserter(FnFeatures));
+      // Grab the target attribute string.
+      StringRef FeaturesStr = TD->getFeatures();
+      SmallVector<StringRef, 1> AttrFeatures;
+      FeaturesStr.split(AttrFeatures, ",");
 
-      if (TD->getCPU() != "")
-	TargetCPU = TD->getCPU();
+      // Grab the various features and prepend a "+" to turn on the feature to
+      // the backend and add them to our existing set of features.
+      for (auto &Feature : AttrFeatures) {
+        // Go ahead and trim whitespace rather than either erroring or
+        // accepting it weirdly.
+        Feature = Feature.trim();
 
+        // While we're here iterating check for a different target cpu.
+        if (Feature.startswith("arch="))
+          TargetCPU = Feature.split("=").second.trim();
+        else if (Feature.startswith("tune="))
+          // We don't support cpu tuning this way currently.
+          ;
+        else if (Feature.startswith("fpmath="))
+          // TODO: Support the fpmath option this way. It will require checking
+          // overall feature validity for the function with the rest of the
+          // attributes on the function.
+          ;
+        else if (Feature.startswith("no-"))
+          FnFeatures.push_back("-" + Feature.split("-").second.str());
+        else
+          FnFeatures.push_back("+" + Feature.str());
+      }
       // Now populate the feature map, first with the TargetCPU which is either
       // the default or a new one from the target attribute string. Then we'll
       // use the passed in features (FeaturesAsWritten) along with the new ones