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[RSForGC] Bring meetBDVStateImpl up to code; NFC 

llvm-svn: 273793
This commit is contained in:
Sanjoy Das 2016-06-26 04:55:13 +00:00
parent bd43d0e2d0
commit 6cf88091b3
1 changed files with 12 additions and 13 deletions
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25
llvm/lib/Transforms/Scalar/RewriteStatepointsForGC.cpp
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@ -601,29 +601,28 @@ static raw_ostream &operator<<(raw_ostream &OS, const BDVState &State) {
} }
#endif #endif
static BDVState meetBDVStateImpl(const BDVState &stateA, static BDVState meetBDVStateImpl(const BDVState &LHS, const BDVState &RHS) {
const BDVState &stateB) { switch (LHS.getStatus()) {
switch (stateA.getStatus()) {
case BDVState::Unknown: case BDVState::Unknown:
return stateB; return RHS;
case BDVState::Base: case BDVState::Base:
assert(stateA.getBase() && "can't be null"); assert(LHS.getBase() && "can't be null");
if (stateB.isUnknown()) if (RHS.isUnknown())
return stateA; return LHS;
if (stateB.isBase()) { if (RHS.isBase()) {
if (stateA.getBase() == stateB.getBase()) { if (LHS.getBase() == RHS.getBase()) {
assert(stateA == stateB && "equality broken!"); assert(LHS == RHS && "equality broken!");
return stateA; return LHS;
} }
return BDVState(BDVState::Conflict); return BDVState(BDVState::Conflict);
} }
assert(stateB.isConflict() && "only three states!"); assert(RHS.isConflict() && "only three states!");
return BDVState(BDVState::Conflict); return BDVState(BDVState::Conflict);
case BDVState::Conflict: case BDVState::Conflict:
return stateA; return LHS;
} }
llvm_unreachable("only three states!"); llvm_unreachable("only three states!");
} }