diff options
| author | Vikram S. Adve <vadve@cs.uiuc.edu> | 2002-08-24 14:44:23 +0000 |
|---|---|---|
| committer | Vikram S. Adve <vadve@cs.uiuc.edu> | 2002-08-24 14:44:23 +0000 |
| commit | 42eb2bae8ee4bf94a50a804149f042f11702c36c (patch) | |
| tree | 8b759d9a051b77481f9d64c0538a0e3ca95ca83e /lib | |
| parent | e6f9a91618224dea065a440f3627bbb6c744ccc3 (diff) | |
Sign-extend array index expressions to work correctly on non-32 bit machines.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3496 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Target/CBackend/CBackend.cpp | 13 | ||||
| -rw-r--r-- | lib/Target/CBackend/Writer.cpp | 13 |
2 files changed, 18 insertions, 8 deletions
diff --git a/lib/Target/CBackend/CBackend.cpp b/lib/Target/CBackend/CBackend.cpp index e33622f71f..f4fb7a2458 100644 --- a/lib/Target/CBackend/CBackend.cpp +++ b/lib/Target/CBackend/CBackend.cpp @@ -210,7 +210,8 @@ ostream &CWriter::printType(const Type *Ty, const string &NameSoFar, case Type::PointerTyID: { const PointerType *PTy = cast<PointerType>(Ty); - return printType(PTy->getElementType(), "(*" + NameSoFar + ")"); + std::string ptrName = NameSoFar.length()? "(*"+NameSoFar+")" : string("*"); + return printType(PTy->getElementType(), ptrName); } case Type::ArrayTyID: { @@ -844,16 +845,20 @@ void CWriter::printIndexingExpression(Value *Ptr, User::op_iterator I, Out << (HasImplicitAddress ? "." : "->"); Out << "field" << cast<ConstantUInt>(*(I+1))->getValue(); I += 2; - } else { // Performing array indexing. Just skip the 0 + } else { // First array index of 0: Just skip it ++I; } } for (; I != E; ++I) if ((*I)->getType() == Type::UIntTy) { - Out << "["; + Out << "[((int) ("; // sign-extend from 32 (to 64) bits writeOperand(*I); - Out << "]"; + Out << " * sizeof("; + printType(cast<PointerType>(Ptr->getType())->getElementType()); + Out << "))) / sizeof("; + printType(cast<PointerType>(Ptr->getType())->getElementType()); + Out << ")]"; } else { Out << ".field" << cast<ConstantUInt>(*I)->getValue(); } diff --git a/lib/Target/CBackend/Writer.cpp b/lib/Target/CBackend/Writer.cpp index e33622f71f..f4fb7a2458 100644 --- a/lib/Target/CBackend/Writer.cpp +++ b/lib/Target/CBackend/Writer.cpp @@ -210,7 +210,8 @@ ostream &CWriter::printType(const Type *Ty, const string &NameSoFar, case Type::PointerTyID: { const PointerType *PTy = cast<PointerType>(Ty); - return printType(PTy->getElementType(), "(*" + NameSoFar + ")"); + std::string ptrName = NameSoFar.length()? "(*"+NameSoFar+")" : string("*"); + return printType(PTy->getElementType(), ptrName); } case Type::ArrayTyID: { @@ -844,16 +845,20 @@ void CWriter::printIndexingExpression(Value *Ptr, User::op_iterator I, Out << (HasImplicitAddress ? "." : "->"); Out << "field" << cast<ConstantUInt>(*(I+1))->getValue(); I += 2; - } else { // Performing array indexing. Just skip the 0 + } else { // First array index of 0: Just skip it ++I; } } for (; I != E; ++I) if ((*I)->getType() == Type::UIntTy) { - Out << "["; + Out << "[((int) ("; // sign-extend from 32 (to 64) bits writeOperand(*I); - Out << "]"; + Out << " * sizeof("; + printType(cast<PointerType>(Ptr->getType())->getElementType()); + Out << "))) / sizeof("; + printType(cast<PointerType>(Ptr->getType())->getElementType()); + Out << ")]"; } else { Out << ".field" << cast<ConstantUInt>(*I)->getValue(); } |