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Have more strict type checks when creating BinOp nodes in BitcodeReader

Browse Source 
Summary: Bug found with AFL.

Reviewers: rafael, bkramer

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D9015

llvm-svn: 235489
This commit is contained in:
Filipe Cabecinhas 2015-04-22 09:06:21 +00:00
parent 76014c544d
commit ae34e5b3f0
3 changed files with 34 additions and 14 deletions
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43
lib/Bitcode/Reader/BitcodeReader.cpp
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@ -607,27 +607,42 @@ static int GetDecodedCastOpcode(unsigned Val) {
case bitc::CAST_ADDRSPACECAST: return Instruction::AddrSpaceCast;
}
}
static int GetDecodedBinaryOpcode(unsigned Val, Type *Ty) {
bool IsFP = Ty->isFPOrFPVectorTy();
// BinOps are only valid for int/fp or vector of int/fp types
if (!IsFP && !Ty->isIntOrIntVectorTy())
return -1;
switch (Val) {
default: return -1;
default:
return -1;
case bitc::BINOP_ADD:
return Ty->isFPOrFPVectorTy() ? Instruction::FAdd : Instruction::Add;
return IsFP ? Instruction::FAdd : Instruction::Add;
case bitc::BINOP_SUB:
return Ty->isFPOrFPVectorTy() ? Instruction::FSub : Instruction::Sub;
return IsFP ? Instruction::FSub : Instruction::Sub;
case bitc::BINOP_MUL:
return Ty->isFPOrFPVectorTy() ? Instruction::FMul : Instruction::Mul;
case bitc::BINOP_UDIV: return Instruction::UDiv;
return IsFP ? Instruction::FMul : Instruction::Mul;
case bitc::BINOP_UDIV:
return IsFP ? -1 : Instruction::UDiv;
case bitc::BINOP_SDIV:
return Ty->isFPOrFPVectorTy() ? Instruction::FDiv : Instruction::SDiv;
case bitc::BINOP_UREM: return Instruction::URem;
return IsFP ? Instruction::FDiv : Instruction::SDiv;
case bitc::BINOP_UREM:
return IsFP ? -1 : Instruction::URem;
case bitc::BINOP_SREM:
return Ty->isFPOrFPVectorTy() ? Instruction::FRem : Instruction::SRem;
case bitc::BINOP_SHL: return Instruction::Shl;
case bitc::BINOP_LSHR: return Instruction::LShr;
case bitc::BINOP_ASHR: return Instruction::AShr;
case bitc::BINOP_AND: return Instruction::And;
case bitc::BINOP_OR: return Instruction::Or;
case bitc::BINOP_XOR: return Instruction::Xor;
return IsFP ? Instruction::FRem : Instruction::SRem;
case bitc::BINOP_SHL:
return IsFP ? -1 : Instruction::Shl;
case bitc::BINOP_LSHR:
return IsFP ? -1 : Instruction::LShr;
case bitc::BINOP_ASHR:
return IsFP ? -1 : Instruction::AShr;
case bitc::BINOP_AND:
return IsFP ? -1 : Instruction::And;
case bitc::BINOP_OR:
return IsFP ? -1 : Instruction::Or;
case bitc::BINOP_XOR:
return IsFP ? -1 : Instruction::Xor;
}
}

BIN
test/Bitcode/Inputs/invalid-fp-shift.bc Normal file
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Binary file not shown.

5
test/Bitcode/invalid.test
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@ -61,3 +61,8 @@ RUN: not llvm-dis -disable-output %p/Inputs/invalid-no-proper-module.bc 2>&1 | \
RUN: FileCheck --check-prefix=NO-MODULE %s
NO-MODULE: Malformed IR file
RUN: not llvm-dis -disable-output %p/Inputs/invalid-fp-shift.bc 2>&1 | \
RUN: FileCheck --check-prefix=FP-SHIFT %s
FP-SHIFT: Invalid record