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[X86][SSE] Split off generic isLaneCrossingShuffleMask helper. NFC. 

Avoid MVT dependency which will be needed in a future patch.
This commit is contained in:
Simon Pilgrim 2019-11-23 12:41:03 +00:00
parent 91aa5daec4
commit 5d9a259ad5
1 changed files with 14 additions and 3 deletions
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17
llvm/lib/Target/X86/X86ISelLowering.cpp
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@ -10251,13 +10251,18 @@ static bool isNoopShuffleMask(ArrayRef<int> Mask) {
return true;
}
/// Test whether there are elements crossing 128-bit lanes in this
/// Test whether there are elements crossing LaneSizeInBits lanes in this
/// shuffle mask.
///
/// X86 divides up its shuffles into in-lane and cross-lane shuffle operations
/// and we routinely test for these.
static bool is128BitLaneCrossingShuffleMask(MVT VT, ArrayRef<int> Mask) {
int LaneSize = 128 / VT.getScalarSizeInBits();
static bool isLaneCrossingShuffleMask(unsigned LaneSizeInBits,
unsigned ScalarSizeInBits,
ArrayRef<int> Mask) {
assert(LaneSizeInBits && ScalarSizeInBits &&
(LaneSizeInBits % ScalarSizeInBits) == 0 &&
"Illegal shuffle lane size");
int LaneSize = LaneSizeInBits / ScalarSizeInBits;
int Size = Mask.size();
for (int i = 0; i < Size; ++i)
if (Mask[i] >= 0 && (Mask[i] % Size) / LaneSize != i / LaneSize)
@ -10265,6 +10270,12 @@ static bool is128BitLaneCrossingShuffleMask(MVT VT, ArrayRef<int> Mask) {
return false;
}
/// Test whether there are elements crossing 128-bit lanes in this
/// shuffle mask.
static bool is128BitLaneCrossingShuffleMask(MVT VT, ArrayRef<int> Mask) {
return isLaneCrossingShuffleMask(128, VT.getScalarSizeInBits(), Mask);
}
/// Test whether a shuffle mask is equivalent within each sub-lane.
///
/// This checks a shuffle mask to see if it is performing the same