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
diff --git a/llvm/lib/Target/ARM/MCTargetDesc/ARMAsmBackend.cpp b/llvm/lib/Target/ARM/MCTargetDesc/ARMAsmBackend.cpp
index 590d72f..3c6b957 100644
--- a/llvm/lib/Target/ARM/MCTargetDesc/ARMAsmBackend.cpp
+++ b/llvm/lib/Target/ARM/MCTargetDesc/ARMAsmBackend.cpp
@@ -154,7 +154,7 @@
} // end anonymous namespace
unsigned ARMAsmBackend::getRelaxedOpcode(unsigned Op) const {
- bool HasThumb2 = STI->getFeatureBits() & ARM::FeatureThumb2;
+ bool HasThumb2 = STI->getFeatureBits()[ARM::FeatureThumb2];
switch (Op) {
default: