From 4f209445c06a43283c6f72dda7c925538b1578e9 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Tue, 21 Sep 2010 23:40:48 +0000
Subject: [PATCH] fix the rest of rdar://8461279 - clang miscompiles
 address-space qualified atomics

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@114503 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/CGBuiltin.cpp | 21 +++++++++++++--------
 test/CodeGen/atomic.c     |  8 ++++++++
 2 files changed, 21 insertions(+), 8 deletions(-)

diff --git a/lib/CodeGen/CGBuiltin.cpp b/lib/CodeGen/CGBuiltin.cpp
index d00f1c1d79..9e7510461b 100644
--- a/lib/CodeGen/CGBuiltin.cpp
+++ b/lib/CodeGen/CGBuiltin.cpp
@@ -85,15 +85,17 @@ static Value *EmitCallWithBarrier(CodeGenFunction &CGF, Value *Fn,
 /// and the expression node.
 static RValue EmitBinaryAtomic(CodeGenFunction &CGF,
                                Intrinsic::ID Id, const CallExpr *E) {
+  llvm::Value *DestPtr = CGF.EmitScalarExpr(E->getArg(0));
+  unsigned AddrSpace =
+    cast<llvm::PointerType>(DestPtr->getType())->getAddressSpace();
   const llvm::Type *ValueType =
     llvm::IntegerType::get(CGF.getLLVMContext(),
                            CGF.getContext().getTypeSize(E->getType()));
-  const llvm::Type *PtrType = ValueType->getPointerTo();
+  const llvm::Type *PtrType = ValueType->getPointerTo(AddrSpace);
   const llvm::Type *IntrinsicTypes[2] = { ValueType, PtrType };
   Value *AtomF = CGF.CGM.getIntrinsic(Id, IntrinsicTypes, 2);
 
-  Value *Args[2] = { CGF.Builder.CreateBitCast(CGF.EmitScalarExpr(E->getArg(0)),
-                                               PtrType),
+  Value *Args[2] = { CGF.Builder.CreateBitCast(DestPtr, PtrType),
                      EmitCastToInt(CGF, ValueType,
                                    CGF.EmitScalarExpr(E->getArg(1))) };
   return RValue::get(EmitCastFromInt(CGF, E->getType(),
@@ -107,15 +109,18 @@ static RValue EmitBinaryAtomic(CodeGenFunction &CGF,
 static RValue EmitBinaryAtomicPost(CodeGenFunction &CGF,
                                    Intrinsic::ID Id, const CallExpr *E,
                                    Instruction::BinaryOps Op) {
+  llvm::Value *DestPtr = CGF.EmitScalarExpr(E->getArg(0));
+  unsigned AddrSpace =
+    cast<llvm::PointerType>(DestPtr->getType())->getAddressSpace();
+  
   const llvm::Type *ValueType =
     llvm::IntegerType::get(CGF.getLLVMContext(),
                            CGF.getContext().getTypeSize(E->getType()));
-  const llvm::Type *PtrType = ValueType->getPointerTo();
+  const llvm::Type *PtrType = ValueType->getPointerTo(AddrSpace);
   const llvm::Type *IntrinsicTypes[2] = { ValueType, PtrType };
   Value *AtomF = CGF.CGM.getIntrinsic(Id, IntrinsicTypes, 2);
 
-  Value *Args[2] = { CGF.Builder.CreateBitCast(CGF.EmitScalarExpr(E->getArg(0)),
-                                               PtrType),
+  Value *Args[2] = { CGF.Builder.CreateBitCast(DestPtr, PtrType),
                      EmitCastToInt(CGF, ValueType,
                                    CGF.EmitScalarExpr(E->getArg(1))) };
   Value *Result = EmitCallWithBarrier(CGF, AtomF, Args, Args + 2);
@@ -790,7 +795,7 @@ RValue CodeGenFunction::EmitBuiltinExpr(const FunctionDecl *FD,
   case Builtin::BI__sync_val_compare_and_swap_16: {
     llvm::Value *DestPtr = CGF.EmitScalarExpr(E->getArg(0));
     unsigned AddrSpace =
-      cast<llvm::PointerType>(DestPtr->getType())->getAddressSpace();;
+      cast<llvm::PointerType>(DestPtr->getType())->getAddressSpace();
     const llvm::Type *ValueType =
       llvm::IntegerType::get(CGF.getLLVMContext(),
                              CGF.getContext().getTypeSize(E->getType()));
@@ -816,7 +821,7 @@ RValue CodeGenFunction::EmitBuiltinExpr(const FunctionDecl *FD,
   case Builtin::BI__sync_bool_compare_and_swap_16: {
     llvm::Value *DestPtr = CGF.EmitScalarExpr(E->getArg(0));
     unsigned AddrSpace =
-      cast<llvm::PointerType>(DestPtr->getType())->getAddressSpace();;
+      cast<llvm::PointerType>(DestPtr->getType())->getAddressSpace();
     const llvm::Type *ValueType =
       llvm::IntegerType::get(CGF.getLLVMContext(),
         CGF.getContext().getTypeSize(E->getArg(1)->getType()));
diff --git a/test/CodeGen/atomic.c b/test/CodeGen/atomic.c
index 6b80e6dda6..e3bc2185b7 100644
--- a/test/CodeGen/atomic.c
+++ b/test/CodeGen/atomic.c
@@ -130,6 +130,7 @@ void release_return(int *lock) {
 }
 
 
+// rdar://8461279 - Atomics with address spaces.
 // CHECK: @addrspace
 void addrspace(int  __attribute__((address_space(256))) * P) {
   __sync_bool_compare_and_swap(P, 0, 1);
@@ -142,5 +143,12 @@ void addrspace(int  __attribute__((address_space(256))) * P) {
   // CHECK: call void @llvm.memory.barrier(i1 true, i1 true, i1 true, i1 true, i1 true)
   // CHECK: call i32 @llvm.atomic.cmp.swap.i32.p256i32(i32 addrspace(256)*{{.*}}, i32 0, i32 1)
   // CHECK: call void @llvm.memory.barrier(i1 true, i1 true, i1 true, i1 true, i1 true)
+  
+  
+  __sync_xor_and_fetch(P, 123);
+  // CHECK: call void @llvm.memory.barrier(i1 true, i1 true, i1 true, i1 true, i1 true)
+  // CHECK: call i32 @llvm.atomic.load.xor.i32.p256i32(i32 addrspace(256)* {{.*}}, i32 123)
+  // CHECK: call void @llvm.memory.barrier(i1 true, i1 true, i1 true, i1 true, i1 true)
+  
 }
 
-- 
2.40.0