PNaCl: Add support for GCC/LLVM vector extensions

lib/Transforms/NaCl/FlattenGlobals.cpp

 //===- FlattenGlobals.cpp - Flatten global variable initializers-----------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This pass converts initializers for global variables into a
@@ skipping 160 matching lines @@
     APInt Data = CF->getValueAPF().bitcastToAPInt();
     assert((Data.getBitWidth() + 7) / 8 == ValSize);
     assert(Data.getBitWidth() % 8 == 0);
     memcpy(Dest, Data.getRawData(), ValSize);
   } else if (ConstantDataSequential *CD =
              dyn_cast<ConstantDataSequential>(Val)) {
     // Note that getRawDataValues() assumes the host endianness is the same.
     StringRef Data = CD->getRawDataValues();
     assert(Data.size() == ValSize);
     memcpy(Dest, Data.data(), Data.size());
-  } else if (isa<ConstantArray>(Val) || isa<ConstantVector>(Val)) {
+  } else if (isa<ConstantArray>(Val) || isa<ConstantDataVector>(Val) ||
+             isa<ConstantVector>(Val)) {

[jvoung (off chromium), 2014/04/16 00:10:27]

Can you also add to the flatten-globals.ll test for these new cases?

     uint64_t ElementSize = DL->getTypeAllocSize(
         Val->getType()->getSequentialElementType());
     for (unsigned I = 0; I < Val->getNumOperands(); ++I) {
       putAtDest(DL, cast<Constant>(Val->getOperand(I)), Dest + ElementSize * I);
     }
   } else if (ConstantStruct *CS = dyn_cast<ConstantStruct>(Val)) {
     const StructLayout *Layout = DL->getStructLayout(CS->getType());
     for (unsigned I = 0; I < CS->getNumOperands(); ++I) {
       putAtDest(DL, CS->getOperand(I), Dest + Layout->getElementOffset(I));
     }
@@ skipping 100 matching lines @@
           ConstantExpr::getBitCast(NewGlobal, Global->getType()));
     Global->eraseFromParent();
   }
   return Modified;
 
 }
 
 ModulePass *llvm::createFlattenGlobalsPass() {
   return new FlattenGlobals();
 }