From fe63fb986dc9510c5d68f2442edab9574e9e50d0 Mon Sep 17 00:00:00 2001 From: Christopher Lamb Date: Tue, 11 Dec 2007 08:59:05 +0000 Subject: Implement address space attribute for LLVM pointer types. Address spaces are regions of memory that have a target specific relationship, as described in the Embedded C Technical Report. This also implements the 2007-12-11-AddressSpaces test, which demonstrates how address space attributes can be used in LLVM IR. In addition, this patch changes the bitcode signature for stores (in a backwards compatible manner), such that the pointer type, rather than the pointee type, is encoded. This permits type information in the pointer (e.g. address space) to be preserved for stores. LangRef updates are forthcoming. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44858 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Bitcode/Writer/BitcodeWriter.cpp | 16 ++++++++++------ 1 file changed, 10 insertions(+), 6 deletions(-) (limited to 'lib/Bitcode/Writer/BitcodeWriter.cpp') diff --git a/lib/Bitcode/Writer/BitcodeWriter.cpp b/lib/Bitcode/Writer/BitcodeWriter.cpp index 612d89338b..c58d23ada2 100644 --- a/lib/Bitcode/Writer/BitcodeWriter.cpp +++ b/lib/Bitcode/Writer/BitcodeWriter.cpp @@ -197,10 +197,14 @@ static void WriteTypeTable(const ValueEnumerator &VE, BitstreamWriter &Stream) { TypeVals.push_back(cast(T)->getBitWidth()); break; case Type::PointerTyID: - // POINTER: [pointee type] + const PointerType *PTy = cast(T); + // POINTER: [pointee type] or [pointee type, address space] Code = bitc::TYPE_CODE_POINTER; - TypeVals.push_back(VE.getTypeID(cast(T)->getElementType())); - AbbrevToUse = PtrAbbrev; + TypeVals.push_back(VE.getTypeID(PTy->getElementType())); + if (unsigned AddressSpace = PTy->getAddressSpace()) + TypeVals.push_back(AddressSpace); + else + AbbrevToUse = PtrAbbrev; break; case Type::FunctionTyID: { @@ -829,9 +833,9 @@ static void WriteInstruction(const Instruction &I, unsigned InstID, Vals.push_back(cast(I).isVolatile()); break; case Instruction::Store: - Code = bitc::FUNC_CODE_INST_STORE; - PushValueAndType(I.getOperand(0), InstID, Vals, VE); // val. - Vals.push_back(VE.getValueID(I.getOperand(1))); // ptr. + Code = bitc::FUNC_CODE_INST_STORE2; + PushValueAndType(I.getOperand(1), InstID, Vals, VE); // ptrty + ptr + Vals.push_back(VE.getValueID(I.getOperand(0))); // val. Vals.push_back(Log2_32(cast(I).getAlignment())+1); Vals.push_back(cast(I).isVolatile()); break; -- cgit v1.2.3-18-g5258