[llvm] [VectorCombine] Enable transform 'scalarizeLoadExtract' for non constant indexes (PR #65445)

[Nikita Popov via llvm-commits]

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@@ -789,11 +793,14 @@ define i32 @load_multiple_extracts_with_variable_indices_large_vector_only_first
 
 define i32 @load_multiple_extracts_with_variable_indices_large_vector_all_valid_by_and(ptr %x, i64 %idx.0, i64 %idx.1) {
 ; CHECK-LABEL: @load_multiple_extracts_with_variable_indices_large_vector_all_valid_by_and(
-; CHECK-NEXT:    [[IDX_0_CLAMPED:%.*]] = and i64 [[IDX_0:%.*]], 15
-; CHECK-NEXT:    [[IDX_1_CLAMPED:%.*]] = and i64 [[IDX_1:%.*]], 15
-; CHECK-NEXT:    [[LV:%.*]] = load <16 x i32>, ptr [[X:%.*]], align 64
-; CHECK-NEXT:    [[E_0:%.*]] = extractelement <16 x i32> [[LV]], i64 [[IDX_0_CLAMPED]]
-; CHECK-NEXT:    [[E_1:%.*]] = extractelement <16 x i32> [[LV]], i64 [[IDX_1_CLAMPED]]
+; CHECK-NEXT:    [[IDX_0_FROZEN:%.*]] = freeze i64 [[IDX_0:%.*]]
+; CHECK-NEXT:    [[IDX_0_CLAMPED:%.*]] = and i64 [[IDX_0_FROZEN]], 15
+; CHECK-NEXT:    [[IDX_1_FROZEN:%.*]] = freeze i64 [[IDX_1:%.*]]
+; CHECK-NEXT:    [[IDX_1_CLAMPED:%.*]] = and i64 [[IDX_1_FROZEN]], 15
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nikic wrote:

Can you please add a test where the same index is used in two extractelements?

https://github.com/llvm/llvm-project/pull/65445