diff options
Diffstat (limited to 'lib/IR/ConstantFold.cpp')
-rw-r--r-- | lib/IR/ConstantFold.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/lib/IR/ConstantFold.cpp b/lib/IR/ConstantFold.cpp index 706e66fb42..c23ab71eaf 100644 --- a/lib/IR/ConstantFold.cpp +++ b/lib/IR/ConstantFold.cpp @@ -529,7 +529,10 @@ Constant *llvm::ConstantFoldCastInstruction(unsigned opc, Constant *V, // Try hard to fold cast of cast because they are often eliminable. if (unsigned newOpc = foldConstantCastPair(opc, CE, DestTy)) return ConstantExpr::getCast(newOpc, CE->getOperand(0), DestTy); - } else if (CE->getOpcode() == Instruction::GetElementPtr) { + } else if (CE->getOpcode() == Instruction::GetElementPtr && + // Do not fold addrspacecast (gep 0, .., 0). It might make the + // addrspacecast uncanonicalized. + opc != Instruction::AddrSpaceCast) { // If all of the indexes in the GEP are null values, there is no pointer // adjustment going on. We might as well cast the source pointer. bool isAllNull = true; |