Use std::bitset for SubtargetFeatures

Previously, subtarget features were a bitfield with the underlying type being uint64_t. 
Since several targets (X86 and ARM, in particular) have hit or were very close to hitting this bound, switching the features to use a bitset.
No functional change.

The first two times this was committed (r229831, r233055), it caused several buildbot failures. 
At least some of the ARM and MIPS ones were due to gcc/binutils issues, and should now be fixed.

llvm-svn: 237234

1 files changed, 5 insertions, 5 deletions

diff --git a/llvm/lib/Target/Mips/Disassembler/MipsDisassembler.cpp b/llvm/lib/Target/Mips/Disassembler/MipsDisassembler.cpp
index f9d0029..c3f391a 100644
--- a/llvm/lib/Target/Mips/Disassembler/MipsDisassembler.cpp
+++ b/llvm/lib/Target/Mips/Disassembler/MipsDisassembler.cpp
@@ -36,16 +36,16 @@ class MipsDisassembler : public MCDisassembler {
 public:
   MipsDisassembler(const MCSubtargetInfo &STI, MCContext &Ctx, bool IsBigEndian)
       : MCDisassembler(STI, Ctx),
-        IsMicroMips(STI.getFeatureBits() & Mips::FeatureMicroMips),
+        IsMicroMips(STI.getFeatureBits()[Mips::FeatureMicroMips]),
         IsBigEndian(IsBigEndian) {}
 
-  bool hasMips3() const { return STI.getFeatureBits() & Mips::FeatureMips3; }
-  bool hasMips32() const { return STI.getFeatureBits() & Mips::FeatureMips32; }
+  bool hasMips3() const { return STI.getFeatureBits()[Mips::FeatureMips3]; }
+  bool hasMips32() const { return STI.getFeatureBits()[Mips::FeatureMips32]; }
   bool hasMips32r6() const {
-    return STI.getFeatureBits() & Mips::FeatureMips32r6;
+    return STI.getFeatureBits()[Mips::FeatureMips32r6];
   }
 
-  bool isGP64() const { return STI.getFeatureBits() & Mips::FeatureGP64Bit; }
+  bool isGP64() const { return STI.getFeatureBits()[Mips::FeatureGP64Bit]; }
 
   bool hasCOP3() const {
     // Only present in MIPS-I and MIPS-II