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, 1 insertions, 1 deletions

diff --git a/llvm/lib/Target/X86/InstPrinter/X86ATTInstPrinter.cpp b/llvm/lib/Target/X86/InstPrinter/X86ATTInstPrinter.cpp
index f265f1dee9d..e0b6c50415b 100644
--- a/llvm/lib/Target/X86/InstPrinter/X86ATTInstPrinter.cpp
+++ b/llvm/lib/Target/X86/InstPrinter/X86ATTInstPrinter.cpp
@@ -57,7 +57,7 @@ void X86ATTInstPrinter::printInst(const MCInst *MI, raw_ostream &OS,
   // InstrInfo.td as soon as Requires clause is supported properly
   // for InstAlias.
   if (MI->getOpcode() == X86::CALLpcrel32 &&
-      (STI.getFeatureBits() & X86::Mode64Bit) != 0) {
+      (STI.getFeatureBits()[X86::Mode64Bit])) {
     OS << "\tcallq\t";
     printPCRelImm(MI, 0, OS);
   }