Add front-end infrastructure now address space casts are in LLVM IR.
With the introduction of explicit address space casts into LLVM, there's
a need to provide a new cast kind the front-end can create for C/OpenCL/CUDA
and code to produce address space casts from those kinds when appropriate.
Patch by Michele Scandale!
llvm-svn: 197036
diff --git a/clang/lib/CodeGen/CGExpr.cpp b/clang/lib/CodeGen/CGExpr.cpp
index cb990b2..92966d0 100644
--- a/clang/lib/CodeGen/CGExpr.cpp
+++ b/clang/lib/CodeGen/CGExpr.cpp
@@ -2744,6 +2744,7 @@
case CK_ARCReclaimReturnedObject:
case CK_ARCExtendBlockObject:
case CK_CopyAndAutoreleaseBlockObject:
+ case CK_AddressSpaceConversion:
return EmitUnsupportedLValue(E, "unexpected cast lvalue");
case CK_Dependent:
diff --git a/clang/lib/CodeGen/CGExprAgg.cpp b/clang/lib/CodeGen/CGExprAgg.cpp
index 9d0f3a9..35e6988 100644
--- a/clang/lib/CodeGen/CGExprAgg.cpp
+++ b/clang/lib/CodeGen/CGExprAgg.cpp
@@ -713,6 +713,7 @@
case CK_CopyAndAutoreleaseBlockObject:
case CK_BuiltinFnToFnPtr:
case CK_ZeroToOCLEvent:
+ case CK_AddressSpaceConversion:
llvm_unreachable("cast kind invalid for aggregate types");
}
}
diff --git a/clang/lib/CodeGen/CGExprComplex.cpp b/clang/lib/CodeGen/CGExprComplex.cpp
index 3351738..ded4bb8 100644
--- a/clang/lib/CodeGen/CGExprComplex.cpp
+++ b/clang/lib/CodeGen/CGExprComplex.cpp
@@ -475,6 +475,7 @@
case CK_CopyAndAutoreleaseBlockObject:
case CK_BuiltinFnToFnPtr:
case CK_ZeroToOCLEvent:
+ case CK_AddressSpaceConversion:
llvm_unreachable("invalid cast kind for complex value");
case CK_FloatingRealToComplex:
diff --git a/clang/lib/CodeGen/CGExprConstant.cpp b/clang/lib/CodeGen/CGExprConstant.cpp
index f4d6861..ad3e1fc 100644
--- a/clang/lib/CodeGen/CGExprConstant.cpp
+++ b/clang/lib/CodeGen/CGExprConstant.cpp
@@ -633,6 +633,9 @@
return llvm::ConstantStruct::get(STy, Elts);
}
+ case CK_AddressSpaceConversion:
+ return llvm::ConstantExpr::getAddrSpaceCast(C, destType);
+
case CK_LValueToRValue:
case CK_AtomicToNonAtomic:
case CK_NonAtomicToAtomic:
@@ -1062,13 +1065,13 @@
if (!Offset->isNullValue()) {
llvm::Constant *Casted = llvm::ConstantExpr::getBitCast(C, Int8PtrTy);
Casted = llvm::ConstantExpr::getGetElementPtr(Casted, Offset);
- C = llvm::ConstantExpr::getBitCast(Casted, C->getType());
+ C = llvm::ConstantExpr::getPointerCast(Casted, C->getType());
}
// Convert to the appropriate type; this could be an lvalue for
// an integer.
if (isa<llvm::PointerType>(DestTy))
- return llvm::ConstantExpr::getBitCast(C, DestTy);
+ return llvm::ConstantExpr::getPointerCast(C, DestTy);
return llvm::ConstantExpr::getPtrToInt(C, DestTy);
} else {
diff --git a/clang/lib/CodeGen/CGExprScalar.cpp b/clang/lib/CodeGen/CGExprScalar.cpp
index 789c986..d734e3c 100644
--- a/clang/lib/CodeGen/CGExprScalar.cpp
+++ b/clang/lib/CodeGen/CGExprScalar.cpp
@@ -1299,7 +1299,18 @@
case CK_AnyPointerToBlockPointerCast:
case CK_BitCast: {
Value *Src = Visit(const_cast<Expr*>(E));
- return Builder.CreateBitCast(Src, ConvertType(DestTy));
+ llvm::Type *SrcTy = Src->getType();
+ llvm::Type *DstTy = ConvertType(DestTy);
+ if (SrcTy->isPtrOrPtrVectorTy() && DstTy->isPtrOrPtrVectorTy() &&
+ SrcTy->getPointerAddressSpace() != DstTy->getPointerAddressSpace()) {
+ llvm::Type *MidTy = CGF.CGM.getDataLayout().getIntPtrType(SrcTy);
+ return Builder.CreateIntToPtr(Builder.CreatePtrToInt(Src, MidTy), DstTy);
+ }
+ return Builder.CreateBitCast(Src, DstTy);
+ }
+ case CK_AddressSpaceConversion: {
+ Value *Src = Visit(const_cast<Expr*>(E));
+ return Builder.CreateAddrSpaceCast(Src, ConvertType(DestTy));
}
case CK_AtomicToNonAtomic:
case CK_NonAtomicToAtomic:
@@ -1360,7 +1371,7 @@
// Make sure the array decay ends up being the right type. This matters if
// the array type was of an incomplete type.
- return CGF.Builder.CreateBitCast(V, ConvertType(CE->getType()));
+ return CGF.Builder.CreatePointerCast(V, ConvertType(CE->getType()));
}
case CK_FunctionToPointerDecay:
return EmitLValue(E).getAddress();