diff options
Diffstat (limited to 'llvm/lib/Target/X86')
| -rw-r--r-- | llvm/lib/Target/X86/X86ISelLowering.cpp | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp index f0b1901d77a..83ca068b0c5 100644 --- a/llvm/lib/Target/X86/X86ISelLowering.cpp +++ b/llvm/lib/Target/X86/X86ISelLowering.cpp @@ -9951,10 +9951,8 @@ static SDValue lowerV8I16VectorShuffle(const SDLoc &DL, ArrayRef<int> Mask, /// /// \returns N above, or the number of times even elements must be dropped if /// there is such a number. Otherwise returns zero. -static int canLowerByDroppingEvenElements(ArrayRef<int> Mask) { - // Figure out whether we're looping over two inputs or just one. - bool IsSingleInput = isSingleInputShuffleMask(Mask); - +static int canLowerByDroppingEvenElements(ArrayRef<int> Mask, + bool IsSingleInput) { // The modulus for the shuffle vector entries is based on whether this is // a single input or not. int ShuffleModulus = Mask.size() * (IsSingleInput ? 1 : 2); @@ -10204,11 +10202,11 @@ static SDValue lowerV16I8VectorShuffle(const SDLoc &DL, ArrayRef<int> Mask, // We special case these as they can be particularly efficiently handled with // the PACKUSB instruction on x86 and they show up in common patterns of // rearranging bytes to truncate wide elements. - if (int NumEvenDrops = canLowerByDroppingEvenElements(Mask)) { + bool IsSingleInput = isSingleInputShuffleMask(Mask); + if (int NumEvenDrops = canLowerByDroppingEvenElements(Mask, IsSingleInput)) { // NumEvenDrops is the power of two stride of the elements. Another way of // thinking about it is that we need to drop the even elements this many // times to get the original input. - bool IsSingleInput = isSingleInputShuffleMask(Mask); // First we need to zero all the dropped bytes. assert(NumEvenDrops <= 3 && |
