[llvm] [VPlan] Remove ILV::sinkScalarOperands. (PR #136023)

[Florian Hahn via llvm-commits]

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@@ -453,16 +453,28 @@ define void @example23c(ptr noalias nocapture %src, ptr noalias nocapture %dst)
 ; CHECK:       vector.body:
 ; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[PRED_STORE_CONTINUE15:%.*]] ]
 ; CHECK-NEXT:    [[OFFSET_IDX:%.*]] = shl i64 [[INDEX]], 1
+; CHECK-NEXT:    [[TMP7:%.*]] = getelementptr i8, ptr [[SRC:%.*]], i64 [[OFFSET_IDX]]
+; CHECK-NEXT:    [[NEXT_GEP2:%.*]] = getelementptr i8, ptr [[TMP7]], i64 2
+; CHECK-NEXT:    [[TMP8:%.*]] = getelementptr i8, ptr [[SRC]], i64 [[OFFSET_IDX]]
+; CHECK-NEXT:    [[NEXT_GEP3:%.*]] = getelementptr i8, ptr [[TMP8]], i64 4
+; CHECK-NEXT:    [[TMP13:%.*]] = getelementptr i8, ptr [[SRC]], i64 [[OFFSET_IDX]]
+; CHECK-NEXT:    [[NEXT_GEP4:%.*]] = getelementptr i8, ptr [[TMP13]], i64 6
 ; CHECK-NEXT:    [[OFFSET_IDX5:%.*]] = shl i64 [[INDEX]], 2
+; CHECK-NEXT:    [[TMP14:%.*]] = getelementptr i8, ptr [[DST:%.*]], i64 [[OFFSET_IDX5]]
+; CHECK-NEXT:    [[NEXT_GEP7:%.*]] = getelementptr i8, ptr [[TMP14]], i64 4
+; CHECK-NEXT:    [[TMP19:%.*]] = getelementptr i8, ptr [[DST]], i64 [[OFFSET_IDX5]]
+; CHECK-NEXT:    [[NEXT_GEP8:%.*]] = getelementptr i8, ptr [[TMP19]], i64 8
+; CHECK-NEXT:    [[TMP20:%.*]] = getelementptr i8, ptr [[DST]], i64 [[OFFSET_IDX5]]
+; CHECK-NEXT:    [[NEXT_GEP9:%.*]] = getelementptr i8, ptr [[TMP20]], i64 12
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fhahn wrote:

If beneficial, e.g. because the GEP can be folded into address mode, this is done by CodeGenPrepare. Also, subsequent runs of instcombine should perform sinking as well.

https://github.com/llvm/llvm-project/pull/136023