[LLVMdev] widen_load fails on AVX

[Demikhovsky, Elena]

Hello Chris,

We caught this failure:
./llc -mattr=+avx ../../test/CodeGen/X86/widen_load-2.ll
llc: LegalizeTypes.cpp:831: void llvm::DAGTypeLegalizer::SetSplitVector(llvm::SDValue, llvm::SDValue, llvm::SDValue): Assertion `Lo.getValueType().getVectorElementType() == Op.getValueType().getVectorElementType() && 2*Lo.getValueType().getVectorNumElements() == Op.getValueType().getVectorNumElements() && Hi.getValueType() == Lo.getValueType() && "Invalid type for split vector"' failed.

The illegal CONCAT_VECTOR node is created from
LegalizeVectorTypes.cpp
DAGTypeLegalizer::GenWidenVectorLoads()

I saw that this code comes from your commit 112171

this is the reduced test
define void @add18i16(<18 x i16>* nocapture sret %ret, <18 x i16>* %bp) nounwind {
  %b = load <18 x i16>* %bp, align 16
  %x = add <18 x i16> zeroinitializer, %b
  store <18 x i16> %x, <18 x i16>* %ret, align 16
  ret void
}

Could you take a look, please.

Thanks.

- Elena

---------------------------------------------------------------------
Intel Israel (74) Limited

This e-mail and any attachments may contain confidential material for
the sole use of the intended recipient(s). Any review or distribution
by others is strictly prohibited. If you are not the intended
recipient, please contact the sender and delete all copies.