[llvm] [IV][RISCV] Make the isDeInterleaveMask check the contents of shuffle (PR #185384)

[Craig Topper via llvm-commits]

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@@ -209,15 +209,24 @@ FunctionPass *llvm::createInterleavedAccessPass() {
 ///     <1, 3, 5, 7>    (mask of index 1 to extract odd elements)
 static bool isDeInterleaveMask(ArrayRef<int> Mask, unsigned &Factor,
                                unsigned &Index, unsigned MaxFactor,
-                               unsigned NumLoadElements) {
+                               unsigned NumLoadElements,
+                               SmallVector<ShuffleVectorInst *, 4> Shuffles) {
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topperc wrote:

Why are we passing this by value?

https://github.com/llvm/llvm-project/pull/185384