[ConstantFold] Fix bitcast to gep constant folding transform.
Make sure to check that the destination type is sized.
A check was present but was incorrectly checking the source type
instead.
Patch by Amaury SECHET!
Differential Revision: http://reviews.llvm.org/D15264
llvm-svn: 255536
diff --git a/llvm/unittests/IR/ConstantsTest.cpp b/llvm/unittests/IR/ConstantsTest.cpp
index 0bf98f3..e3b303a 100644
--- a/llvm/unittests/IR/ConstantsTest.cpp
+++ b/llvm/unittests/IR/ConstantsTest.cpp
@@ -433,5 +433,22 @@
}
}
+TEST(ConstantsTest, BitcastToGEP) {
+ LLVMContext Context;
+ std::unique_ptr<Module> M(new Module("MyModule", Context));
+
+ auto *i32 = Type::getInt32Ty(Context);
+ auto *U = StructType::create(Context, "Unsized");
+ Type *EltTys[] = {i32, U};
+ auto *S = StructType::create(EltTys);
+
+ auto *G = new GlobalVariable(*M, S, false,
+ GlobalValue::ExternalLinkage, nullptr);
+ auto *PtrTy = PointerType::get(i32, 0);
+ auto *C = ConstantExpr::getBitCast(G, PtrTy);
+ ASSERT_EQ(dyn_cast<ConstantExpr>(C)->getOpcode(),
+ Instruction::BitCast);
+}
+
} // end anonymous namespace
} // end namespace llvm