[llvm] [SLP]Initial support for copyable elements (PR #147366)

[Alexey Bataev via llvm-commits]

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@@ -19,14 +19,14 @@ define void @test(ptr %0, i32 %add651) {
 ; CHECK-NEXT:    [[ARRAYIDX660:%.*]] = getelementptr i8, ptr [[TMP4]], i64 7800
 ; CHECK-NEXT:    [[ARRAYIDX689:%.*]] = getelementptr i8, ptr [[TMP4]], i64 7816
 ; CHECK-NEXT:    [[TMP6:%.*]] = add <2 x i32> [[TMP3]], splat (i32 1)
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alexey-bataev wrote:

The check that tries to check the profitability considers it unprofitable. I tried to to make it vectorizable, but found out it is unprofitable too, too many buildvectors, which add the cost and make the whole tree non-profitable for vectorization

https://github.com/llvm/llvm-project/pull/147366