Concurrency support for PNaCl ABI

lib/Analysis/NaCl/PNaClABIVerifyModule.cpp

 //===- PNaClABIVerifyModule.cpp - Verify PNaCl ABI rules ------------------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // Verify module-level PNaCl ABI requirements (specifically those that do not
 // require looking at the function bodies)
 //
 //
 //===----------------------------------------------------------------------===//
 
-#include "llvm/Pass.h"
+#include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/StringMap.h"
 #include "llvm/ADT/Twine.h"
 #include "llvm/Analysis/NaCl.h"
 #include "llvm/IR/Constants.h"
 #include "llvm/IR/DerivedTypes.h"
+#include "llvm/IR/Instructions.h"
 #include "llvm/IR/Intrinsics.h"
 #include "llvm/IR/Module.h"
+#include "llvm/Pass.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/raw_ostream.h"
 
 #include "PNaClABITypeChecker.h"
 using namespace llvm;
 
 namespace llvm {
 cl::opt<bool>
 PNaClABIAllowDebugMetadata("pnaclabi-allow-debug-metadata",
   cl::desc("Allow debug metadata during PNaCl ABI verification."),
@@ skipping 132 matching lines @@
   // definitions, but that should be done by user-toolchain
   // optimization passes, not by the PNaCl translator.
   if (GV->hasUnnamedAddr()) {
     Reporter->addError() << GVTypeName << GV->getName()
                          << " has disallowed \"unnamed_addr\" attribute\n";
   }
 }
 
 AllowedIntrinsics::AllowedIntrinsics(LLVMContext *Context) : Context(Context) {
   Type *I8Ptr = Type::getInt8PtrTy(*Context);
+  Type *I8 = Type::getInt8Ty(*Context);
   Type *I16 = Type::getInt16Ty(*Context);
   Type *I32 = Type::getInt32Ty(*Context);
   Type *I64 = Type::getInt64Ty(*Context);
   Type *Float = Type::getFloatTy(*Context);
   Type *Double = Type::getDoubleTy(*Context);
 
   // We accept bswap for a limited set of types (i16, i32, i64).  The
   // various backends are able to generate instructions to implement
   // the intrinsic.  Also, i16 and i64 are easy to implement as along
   // as there is a way to do i32.
@@ skipping 10 matching lines @@
   addIntrinsic(Intrinsic::ctpop, I64);
 
   addIntrinsic(Intrinsic::nacl_read_tp);
   addIntrinsic(Intrinsic::nacl_longjmp);
   addIntrinsic(Intrinsic::nacl_setjmp);
 
   // For native sqrt instructions. Must guarantee when x < -0.0, sqrt(x) = NaN.
   addIntrinsic(Intrinsic::sqrt, Float);
   addIntrinsic(Intrinsic::sqrt, Double);
 
+  Type *AtomicTypes[] = { I8, I16, I32, I64 };
+  for (size_t T = 0, E = array_lengthof(AtomicTypes); T != E; ++T) {
+    addIntrinsic(Intrinsic::nacl_atomic_load, AtomicTypes[T]);
+    addIntrinsic(Intrinsic::nacl_atomic_store, AtomicTypes[T]);
+    addIntrinsic(Intrinsic::nacl_atomic_rmw, AtomicTypes[T]);
+    addIntrinsic(Intrinsic::nacl_atomic_cmpxchg, AtomicTypes[T]);
+  }
+  addIntrinsic(Intrinsic::nacl_atomic_fence);
+
   // Stack save and restore are used to support C99 VLAs.
   addIntrinsic(Intrinsic::stacksave);
   addIntrinsic(Intrinsic::stackrestore);
 
   addIntrinsic(Intrinsic::trap);
 
   // We only allow the variants of memcpy/memmove/memset with an i32
   // "len" argument, not an i64 argument.
   Type *MemcpyTypes[] = { I8Ptr, I8Ptr, I32 };
   addIntrinsic(Intrinsic::memcpy, MemcpyTypes);
   addIntrinsic(Intrinsic::memmove, MemcpyTypes);
   Type *MemsetTypes[] = { I8Ptr, I32 };
   addIntrinsic(Intrinsic::memset, MemsetTypes);
 }
 
 bool AllowedIntrinsics::isAllowed(const Function *Func) {
   // Keep 3 categories of intrinsics for now.
   // (1) Allowed always, provided the exact name and type match.
-  // (2) Never allowed
+  // (2) Never allowed.
   // (3) "Dev" intrinsics, which may or may not be allowed.
   // "Dev" intrinsics are controlled by the PNaClABIAllowDevIntrinsics flag.
   // Please keep these sorted or grouped in a sensible way, within
   // each category.
 
   // (1) Allowed always, provided the exact name and type match.
   if (Mapping.count(Func->getName()) == 1)
     return Func->getFunctionType() == Mapping[Func->getName()];
 
   switch (Func->getIntrinsicID()) {
@@ skipping 272 matching lines @@
 }
 
 char PNaClABIVerifyModule::ID = 0;
 INITIALIZE_PASS(PNaClABIVerifyModule, "verify-pnaclabi-module",
                 "Verify module for PNaCl", false, true)
 
 ModulePass *llvm::createPNaClABIVerifyModulePass(
     PNaClABIErrorReporter *Reporter, bool StreamingMode) {
   return new PNaClABIVerifyModule(Reporter, StreamingMode);
 }