diff options
Diffstat (limited to 'llvm/lib/CodeGen/CodeGenPrepare.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/CodeGenPrepare.cpp | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/CodeGenPrepare.cpp b/llvm/lib/CodeGen/CodeGenPrepare.cpp index d6633a508f5..96b7704a765 100644 --- a/llvm/lib/CodeGen/CodeGenPrepare.cpp +++ b/llvm/lib/CodeGen/CodeGenPrepare.cpp @@ -4358,7 +4358,12 @@ bool CodeGenPrepare::optimizeMemoryInst(Instruction *MemoryInst, Value *Addr, // Now that we determined the addressing expression we want to use and know // that we have to sink it into this block. Check to see if we have already // done this for some other load/store instr in this block. If so, reuse the - // computation. + // computation. Before attempting reuse, check if the address is valid as it + // may have been erased. + auto I = SunkAddrs.find(Addr); + if (I != SunkAddrs.end() && I->second && I->second->user_empty()) + SunkAddrs.erase(I); + Value *&SunkAddr = SunkAddrs[Addr]; if (SunkAddr) { DEBUG(dbgs() << "CGP: Reusing nonlocal addrmode: " << AddrMode << " for " |
