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[FuzzMutate] Avoid using swifterror as a source operand

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Differential Revision: https://reviews.llvm.org/D41107



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@322280 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Igor Laevsky 2018-01-11 14:43:05 +00:00
parent 1694ebbaaf
commit e35ff4e49b
2 changed files with 35 additions and 1 deletions
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6
include/llvm/FuzzMutate/OpDescriptor.h
View File

@ -20,6 +20,7 @@
#include "llvm/ADT/SmallVector.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/Type.h"
#include "llvm/IR/Value.h"
#include <functional>
@ -128,7 +129,7 @@ static inline SourcePred anyFloatType() {
static inline SourcePred anyPtrType() {
auto Pred = [](ArrayRef<Value *>, const Value *V) {
return V->getType()->isPointerTy();
return V->getType()->isPointerTy() && !V->isSwiftError();
};
auto Make = [](ArrayRef<Value *>, ArrayRef<Type *> Ts) {
std::vector<Constant *> Result;
@ -142,6 +143,9 @@ static inline SourcePred anyPtrType() {
static inline SourcePred sizedPtrType() {
auto Pred = [](ArrayRef<Value *>, const Value *V) {
if (V->isSwiftError())
return false;
if (const auto *PtrT = dyn_cast<PointerType>(V->getType()))
return PtrT->getElementType()->isSized();
return false;

30
unittests/FuzzMutate/RandomIRBuilderTest.cpp
View File

@ -266,4 +266,34 @@ TEST(RandomIRBuilderTest, FirstClassTypes) {
}
}
TEST(RandomIRBuilderTest, SwiftError) {
// Check that we never pick swifterror value as a source for operation
// other than load, store and call.
LLVMContext Ctx;
const char *SourceCode = "declare void @use(i8** swifterror %err)"
"define void @test() {\n"
"entry:\n"
" %err = alloca swifterror i8*, align 8\n"
" call void @use(i8** swifterror %err)\n"
" ret void\n"
"}";
auto M = parseAssembly(SourceCode, Ctx);
std::vector<Type *> Types = {Type::getInt8Ty(Ctx)};
RandomIRBuilder IB(Seed, Types);
// Get first basic block of the test function
Function &F = *M->getFunction("test");
BasicBlock &BB = *F.begin();
Instruction *Alloca = &*BB.begin();
fuzzerop::OpDescriptor Descr = fuzzerop::gepDescriptor(1);
for (int i = 0; i < 10; ++i) {
Value *V = IB.findOrCreateSource(BB, {Alloca}, {}, Descr.SourcePreds[0]);
ASSERT_FALSE(isa<AllocaInst>(V));
}
}
}