diff options
| -rw-r--r-- | llvm/lib/IR/ConstantFold.cpp | 3 | ||||
| -rw-r--r-- | llvm/test/Transforms/ConstProp/trunc_vec.ll | 9 |
2 files changed, 12 insertions, 0 deletions
diff --git a/llvm/lib/IR/ConstantFold.cpp b/llvm/lib/IR/ConstantFold.cpp index 9124c111935..b96d1540d71 100644 --- a/llvm/lib/IR/ConstantFold.cpp +++ b/llvm/lib/IR/ConstantFold.cpp @@ -674,6 +674,9 @@ Constant *llvm::ConstantFoldCastInstruction(unsigned opc, Constant *V, } return nullptr; case Instruction::Trunc: { + if (V->getType()->isVectorTy()) + return nullptr; + uint32_t DestBitWidth = cast<IntegerType>(DestTy)->getBitWidth(); if (ConstantInt *CI = dyn_cast<ConstantInt>(V)) { return ConstantInt::get(V->getContext(), diff --git a/llvm/test/Transforms/ConstProp/trunc_vec.ll b/llvm/test/Transforms/ConstProp/trunc_vec.ll new file mode 100644 index 00000000000..99db329cdd2 --- /dev/null +++ b/llvm/test/Transforms/ConstProp/trunc_vec.ll @@ -0,0 +1,9 @@ +; RUN: opt -constprop < %s + +; Make sure we don't crash on this one + +define <8 x i8> @test_truc_vec() { + %x = bitcast <2 x i64> <i64 1, i64 2> to <8 x i16> + %y = trunc <8 x i16> %x to <8 x i8> + ret <8 x i8> %y +} |
