[FuzzMutate] Avoid using swifterror as a source operand
Differential Revision: https://reviews.llvm.org/D41107
llvm-svn: 322280
diff --git a/llvm/unittests/FuzzMutate/RandomIRBuilderTest.cpp b/llvm/unittests/FuzzMutate/RandomIRBuilderTest.cpp
index b60da6c..d6ad07d 100644
--- a/llvm/unittests/FuzzMutate/RandomIRBuilderTest.cpp
+++ b/llvm/unittests/FuzzMutate/RandomIRBuilderTest.cpp
@@ -266,4 +266,34 @@
}
}
+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));
+ }
+}
+
}