diff options
Diffstat (limited to 'llvm/lib/CodeGen/LiveIntervals.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/LiveIntervals.cpp | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/llvm/lib/CodeGen/LiveIntervals.cpp b/llvm/lib/CodeGen/LiveIntervals.cpp index 3485a27..d2f2c3e 100644 --- a/llvm/lib/CodeGen/LiveIntervals.cpp +++ b/llvm/lib/CodeGen/LiveIntervals.cpp @@ -101,15 +101,11 @@ static cl::opt<bool> EnablePrecomputePhysRegs( static bool EnablePrecomputePhysRegs = false; #endif // NDEBUG -namespace llvm { - -cl::opt<bool> UseSegmentSetForPhysRegs( +cl::opt<bool> llvm::UseSegmentSetForPhysRegs( "use-segment-set-for-physregs", cl::Hidden, cl::init(true), cl::desc( "Use segment set for the computation of the live ranges of physregs.")); -} // end namespace llvm - void LiveIntervalsWrapperPass::getAnalysisUsage(AnalysisUsage &AU) const { AU.setPreservesCFG(); AU.addPreserved<LiveVariablesWrapperPass>(); @@ -665,7 +661,10 @@ void LiveIntervals::extendToIndices(LiveRange &LR, void LiveIntervals::pruneValue(LiveRange &LR, SlotIndex Kill, SmallVectorImpl<SlotIndex> *EndPoints) { LiveQueryResult LRQ = LR.Query(Kill); - VNInfo *VNI = LRQ.valueOutOrDead(); + // LR may have liveness reachable from early clobber slot, which may be + // only live-in instead of live-out of the instruction. + // For example, LR =[1r, 3r), Kill = 3e, we have to prune [3e, 3r) of LR. + VNInfo *VNI = LRQ.valueOutOrDead() ? LRQ.valueOutOrDead() : LRQ.valueIn(); if (!VNI) return; |