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Use std::bitset for SubtargetFeatures.

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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 several times this was committed (e.g. r229831, r233055), it caused several buildbot failures.
Apparently the reason for most failures was both clang and gcc's inability to deal with large numbers (> 10K) of bitset constructor calls in tablegen-generated initializers of instruction info tables. 
This should now be fixed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@238192 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Michael Kuperstein
2015-05-26 10:47:10 +00:00
parent bda72d8098
commit d714fcf5c8
38 changed files with 1074 additions and 1022 deletions
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2
lib/Target/PowerPC/Disassembler/PPCDisassembler.cpp
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@ -387,7 +387,7 @@ DecodeStatus PPCDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
uint32_t Inst =
(Bytes[0] << 24) | (Bytes[1] << 16) | (Bytes[2] << 8) | (Bytes[3] << 0);
if ((STI.getFeatureBits() & PPC::FeatureQPX) != 0) {
if (STI.getFeatureBits()[PPC::FeatureQPX]) {
DecodeStatus result =
decodeInstruction(DecoderTableQPX32, MI, Inst, Address, this, STI);
if (result != MCDisassembler::Fail)