r325996 - bpf: Hook target feature "alu32" with LLVM

[Yonghong Song via cfe-commits]

Author: yhs
Date: Fri Feb 23 15:55:29 2018
New Revision: 325996

URL: http://llvm.org/viewvc/llvm-project?rev=325996&view=rev
Log:
bpf: Hook target feature "alu32" with LLVM

LLVM has supported a new target feature "alu32" which could be enabled or
disabled by "-mattr=[+|-]alu32" when using llc.

This patch link Clang with it, so it could be also done by passing related
options to Clang, for example:

  -Xclang -target-feature -Xclang +alu32

Signed-off-by: Jiong Wang <jiong.wang at netronome.com>
Reviewed-by: Yonghong Song <yhs at fb.com>

Modified:
    cfe/trunk/lib/Basic/Targets/BPF.h

Modified: cfe/trunk/lib/Basic/Targets/BPF.h
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Basic/Targets/BPF.h?rev=325996&r1=325995&r2=325996&view=diff
==============================================================================
--- cfe/trunk/lib/Basic/Targets/BPF.h (original)
+++ cfe/trunk/lib/Basic/Targets/BPF.h Fri Feb 23 15:55:29 2018
@@ -46,7 +46,14 @@ public:
   void getTargetDefines(const LangOptions &Opts,
                         MacroBuilder &Builder) const override;
 
-  bool hasFeature(StringRef Feature) const override { return Feature == "bpf"; }
+  bool hasFeature(StringRef Feature) const override {
+    return Feature == "bpf" || Feature == "alu32";
+  }
+
+  void setFeatureEnabled(llvm::StringMap<bool> &Features, StringRef Name,
+                         bool Enabled) const override {
+    Features[Name] = Enabled;
+  }
 
   ArrayRef<Builtin::Info> getTargetBuiltins() const override { return None; }