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[SCEV] Add UDiv canonicalization tests with nested AddRecs.
Add more tests for follow-up to llvm#169576.
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‎llvm/test/Analysis/ScalarEvolution/addrec-may-wrap-udiv-canonicalize.ll‎

Lines changed: 233 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -167,3 +167,236 @@ loop:
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exit:
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ret void
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}
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define void @test_step2_start_outer_add_rec_step_16(i64 %n, i64 %m) {
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; CHECK-LABEL: 'test_step2_start_outer_add_rec_step_16'
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; CHECK-NEXT: Classifying expressions for: @test_step2_start_outer_add_rec_step_16
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; CHECK-NEXT: %outer.iv = phi i64 [ 0, %entry ], [ %outer.iv.next, %outer.latch ]
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; CHECK-NEXT: --> {0,+,16}<%outer.header> U: [0,-15) S: [-9223372036854775808,9223372036854775793) Exits: <<Unknown>> LoopDispositions: { %outer.header: Computable, %loop: Invariant }
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; CHECK-NEXT: %iv = phi i64 [ %outer.iv, %outer.header ], [ %iv.next, %loop ]
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; CHECK-NEXT: --> {{\{\{}}0,+,16}<%outer.header>,+,2}<%loop> U: [0,-1) S: [-9223372036854775808,9223372036854775807) Exits: <<Unknown>> LoopDispositions: { %loop: Computable, %outer.header: Variant }
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; CHECK-NEXT: %div.0 = udiv i64 %iv, 4
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; CHECK-NEXT: --> ({{\{\{}}0,+,16}<%outer.header>,+,2}<%loop> /u 4) U: [0,4611686018427387904) S: [0,4611686018427387904) Exits: <<Unknown>> LoopDispositions: { %loop: Computable, %outer.header: Variant }
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; CHECK-NEXT: %iv.1 = add i64 %iv, 1
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; CHECK-NEXT: --> {{\{\{}}1,+,16}<%outer.header>,+,2}<%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable, %outer.header: Variant }
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; CHECK-NEXT: %div.1 = udiv i64 %iv.1, 4
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; CHECK-NEXT: --> ({{\{\{}}1,+,16}<%outer.header>,+,2}<%loop> /u 4) U: [0,4611686018427387904) S: [0,4611686018427387904) Exits: <<Unknown>> LoopDispositions: { %loop: Computable, %outer.header: Variant }
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; CHECK-NEXT: %iv.2 = add i64 %iv, 2
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; CHECK-NEXT: --> {{\{\{}}2,+,16}<%outer.header>,+,2}<%loop> U: [0,-1) S: [-9223372036854775808,9223372036854775807) Exits: <<Unknown>> LoopDispositions: { %loop: Computable, %outer.header: Variant }
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; CHECK-NEXT: %div.2 = udiv i64 %iv.2, 4
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; CHECK-NEXT: --> ({{\{\{}}2,+,16}<%outer.header>,+,2}<%loop> /u 4) U: [0,4611686018427387904) S: [0,4611686018427387904) Exits: <<Unknown>> LoopDispositions: { %loop: Computable, %outer.header: Variant }
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; CHECK-NEXT: %iv.3 = add i64 %iv, 3
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; CHECK-NEXT: --> {{\{\{}}3,+,16}<%outer.header>,+,2}<%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable, %outer.header: Variant }
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; CHECK-NEXT: %div.3 = udiv i64 %iv.3, 4
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; CHECK-NEXT: --> ({{\{\{}}3,+,16}<%outer.header>,+,2}<%loop> /u 4) U: [0,4611686018427387904) S: [0,4611686018427387904) Exits: <<Unknown>> LoopDispositions: { %loop: Computable, %outer.header: Variant }
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; CHECK-NEXT: %iv.4 = add i64 %iv, 4
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; CHECK-NEXT: --> {{\{\{}}4,+,16}<%outer.header>,+,2}<%loop> U: [0,-1) S: [-9223372036854775808,9223372036854775807) Exits: <<Unknown>> LoopDispositions: { %loop: Computable, %outer.header: Variant }
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; CHECK-NEXT: %div.4 = udiv i64 %iv.4, 4
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; CHECK-NEXT: --> ({{\{\{}}4,+,16}<%outer.header>,+,2}<%loop> /u 4) U: [0,4611686018427387904) S: [0,4611686018427387904) Exits: <<Unknown>> LoopDispositions: { %loop: Computable, %outer.header: Variant }
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; CHECK-NEXT: %iv.5 = add i64 %iv, 5
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; CHECK-NEXT: --> {{\{\{}}5,+,16}<%outer.header>,+,2}<%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable, %outer.header: Variant }
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; CHECK-NEXT: %div.5 = udiv i64 %iv.5, 4
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; CHECK-NEXT: --> ({{\{\{}}5,+,16}<%outer.header>,+,2}<%loop> /u 4) U: [0,4611686018427387904) S: [0,4611686018427387904) Exits: <<Unknown>> LoopDispositions: { %loop: Computable, %outer.header: Variant }
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; CHECK-NEXT: %iv.neg.1 = add i64 %iv, -1
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; CHECK-NEXT: --> {{\{\{}}-1,+,16}<%outer.header>,+,2}<%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable, %outer.header: Variant }
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; CHECK-NEXT: %div.neg.1 = udiv i64 %iv.neg.1, 4
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; CHECK-NEXT: --> ({{\{\{}}-1,+,16}<%outer.header>,+,2}<%loop> /u 4) U: [0,4611686018427387904) S: [0,4611686018427387904) Exits: <<Unknown>> LoopDispositions: { %loop: Computable, %outer.header: Variant }
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; CHECK-NEXT: %div3.0 = udiv i64 %iv, 3
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; CHECK-NEXT: --> ({{\{\{}}0,+,16}<%outer.header>,+,2}<%loop> /u 3) U: [0,6148914691236517205) S: [0,6148914691236517206) Exits: <<Unknown>> LoopDispositions: { %loop: Computable, %outer.header: Variant }
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; CHECK-NEXT: %div3.1 = udiv i64 %iv.1, 3
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; CHECK-NEXT: --> ({{\{\{}}1,+,16}<%outer.header>,+,2}<%loop> /u 3) U: [0,6148914691236517206) S: [0,6148914691236517206) Exits: <<Unknown>> LoopDispositions: { %loop: Computable, %outer.header: Variant }
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; CHECK-NEXT: %div3.2 = udiv i64 %iv.2, 3
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; CHECK-NEXT: --> ({{\{\{}}2,+,16}<%outer.header>,+,2}<%loop> /u 3) U: [0,6148914691236517205) S: [0,6148914691236517206) Exits: <<Unknown>> LoopDispositions: { %loop: Computable, %outer.header: Variant }
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; CHECK-NEXT: %div3.4 = udiv i64 %iv.4, 3
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; CHECK-NEXT: --> ({{\{\{}}4,+,16}<%outer.header>,+,2}<%loop> /u 3) U: [0,6148914691236517205) S: [0,6148914691236517206) Exits: <<Unknown>> LoopDispositions: { %loop: Computable, %outer.header: Variant }
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; CHECK-NEXT: %div3.5 = udiv i64 %iv.5, 3
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; CHECK-NEXT: --> ({{\{\{}}5,+,16}<%outer.header>,+,2}<%loop> /u 3) U: [0,6148914691236517206) S: [0,6148914691236517206) Exits: <<Unknown>> LoopDispositions: { %loop: Computable, %outer.header: Variant }
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; CHECK-NEXT: %iv.next = add i64 %iv, 2
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; CHECK-NEXT: --> {{\{\{}}2,+,16}<%outer.header>,+,2}<%loop> U: [0,-1) S: [-9223372036854775808,9223372036854775807) Exits: <<Unknown>> LoopDispositions: { %loop: Computable, %outer.header: Variant }
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; CHECK-NEXT: %outer.iv.next = add i64 %outer.iv, 16
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; CHECK-NEXT: --> {16,+,16}<%outer.header> U: [0,-15) S: [-9223372036854775808,9223372036854775793) Exits: <<Unknown>> LoopDispositions: { %outer.header: Computable, %loop: Invariant }
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; CHECK-NEXT: Determining loop execution counts for: @test_step2_start_outer_add_rec_step_16
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; CHECK-NEXT: Loop %loop: Unpredictable backedge-taken count.
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; CHECK-NEXT: Loop %loop: Unpredictable constant max backedge-taken count.
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; CHECK-NEXT: Loop %loop: Unpredictable symbolic max backedge-taken count.
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; CHECK-NEXT: Loop %outer.header: Unpredictable backedge-taken count.
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; CHECK-NEXT: Loop %outer.header: Unpredictable constant max backedge-taken count.
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; CHECK-NEXT: Loop %outer.header: Unpredictable symbolic max backedge-taken count.
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; CHECK-NEXT: Loop %outer.header: Predicated backedge-taken count is (%m /u 16)
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; CHECK-NEXT: Predicates:
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; CHECK-NEXT: Equal predicate: (zext i4 (trunc i64 %m to i4) to i64) == 0
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; CHECK-NEXT: Loop %outer.header: Predicated constant max backedge-taken count is i64 1152921504606846975
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; CHECK-NEXT: Predicates:
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; CHECK-NEXT: Equal predicate: (zext i4 (trunc i64 %m to i4) to i64) == 0
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; CHECK-NEXT: Loop %outer.header: Predicated symbolic max backedge-taken count is (%m /u 16)
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; CHECK-NEXT: Predicates:
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; CHECK-NEXT: Equal predicate: (zext i4 (trunc i64 %m to i4) to i64) == 0
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;
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entry:
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br label %outer.header
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outer.header:
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%outer.iv = phi i64 [ 0, %entry ], [ %outer.iv.next, %outer.latch ]
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br label %loop
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loop:
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%iv = phi i64 [ %outer.iv, %outer.header ], [ %iv.next, %loop ]
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%div.0 = udiv i64 %iv, 4
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call void @use(i64 %div.0)
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%iv.1 = add i64 %iv, 1
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%div.1 = udiv i64 %iv.1, 4
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call void @use(i64 %div.1)
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%iv.2 = add i64 %iv, 2
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%div.2 = udiv i64 %iv.2, 4
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call void @use(i64 %div.2)
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%iv.3 = add i64 %iv, 3
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%div.3 = udiv i64 %iv.3, 4
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call void @use(i64 %div.3)
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%iv.4 = add i64 %iv, 4
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%div.4 = udiv i64 %iv.4, 4
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call void @use(i64 %div.4)
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%iv.5 = add i64 %iv, 5
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%div.5 = udiv i64 %iv.5, 4
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call void @use(i64 %div.5)
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%iv.neg.1 = add i64 %iv, -1
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%div.neg.1 = udiv i64 %iv.neg.1, 4
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call void @use(i64 %div.neg.1)
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%div3.0 = udiv i64 %iv, 3
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call void @use(i64 %div3.0)
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%div3.1 = udiv i64 %iv.1,3
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call void @use(i64 %div3.1)
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%div3.2 = udiv i64 %iv.2, 3
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call void @use(i64 %div3.2)
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%div3.4 = udiv i64 %iv.4, 3
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call void @use(i64 %div3.4)
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%div3.5 = udiv i64 %iv.5, 3
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call void @use(i64 %div3.5)
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%iv.next = add i64 %iv, 2
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%cond = icmp slt i64 %iv, %n
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br i1 %cond, label %loop, label %outer.latch
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outer.latch:
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%outer.iv.next = add i64 %outer.iv, 16
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%outer.ec = icmp eq i64 %outer.iv, %m
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br i1 %outer.ec, label %exit, label %outer.header
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exit:
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ret void
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}
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define void @test_step2_div4_start_outer_add_rec_step_2(i64 %n, i64 %m) {
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; CHECK-LABEL: 'test_step2_div4_start_outer_add_rec_step_2'
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; CHECK-NEXT: Classifying expressions for: @test_step2_div4_start_outer_add_rec_step_2
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; CHECK-NEXT: %outer.iv = phi i64 [ 0, %entry ], [ %outer.iv.next, %outer.latch ]
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; CHECK-NEXT: --> {0,+,2}<%outer.header> U: [0,-1) S: [-9223372036854775808,9223372036854775807) Exits: <<Unknown>> LoopDispositions: { %outer.header: Computable, %loop: Invariant }
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; CHECK-NEXT: %iv = phi i64 [ %outer.iv, %outer.header ], [ %iv.next, %loop ]
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; CHECK-NEXT: --> {{\{\{}}0,+,2}<%outer.header>,+,2}<%loop> U: [0,-1) S: [-9223372036854775808,9223372036854775807) Exits: <<Unknown>> LoopDispositions: { %loop: Computable, %outer.header: Variant }
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; CHECK-NEXT: %div.0 = udiv i64 %iv, 4
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; CHECK-NEXT: --> ({{\{\{}}0,+,2}<%outer.header>,+,2}<%loop> /u 4) U: [0,4611686018427387904) S: [0,4611686018427387904) Exits: <<Unknown>> LoopDispositions: { %loop: Computable, %outer.header: Variant }
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; CHECK-NEXT: %iv.1 = add i64 %iv, 1
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; CHECK-NEXT: --> {{\{\{}}1,+,2}<%outer.header>,+,2}<%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable, %outer.header: Variant }
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; CHECK-NEXT: %div.1 = udiv i64 %iv.1, 4
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; CHECK-NEXT: --> ({{\{\{}}1,+,2}<%outer.header>,+,2}<%loop> /u 4) U: [0,4611686018427387904) S: [0,4611686018427387904) Exits: <<Unknown>> LoopDispositions: { %loop: Computable, %outer.header: Variant }
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; CHECK-NEXT: %iv.2 = add i64 %iv, 2
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; CHECK-NEXT: --> {{\{\{}}2,+,2}<%outer.header>,+,2}<%loop> U: [0,-1) S: [-9223372036854775808,9223372036854775807) Exits: <<Unknown>> LoopDispositions: { %loop: Computable, %outer.header: Variant }
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; CHECK-NEXT: %div.2 = udiv i64 %iv.2, 4
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; CHECK-NEXT: --> ({{\{\{}}2,+,2}<%outer.header>,+,2}<%loop> /u 4) U: [0,4611686018427387904) S: [0,4611686018427387904) Exits: <<Unknown>> LoopDispositions: { %loop: Computable, %outer.header: Variant }
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; CHECK-NEXT: %iv.3 = add i64 %iv, 3
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; CHECK-NEXT: --> {{\{\{}}3,+,2}<%outer.header>,+,2}<%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable, %outer.header: Variant }
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; CHECK-NEXT: %div.3 = udiv i64 %iv.3, 4
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; CHECK-NEXT: --> ({{\{\{}}3,+,2}<%outer.header>,+,2}<%loop> /u 4) U: [0,4611686018427387904) S: [0,4611686018427387904) Exits: <<Unknown>> LoopDispositions: { %loop: Computable, %outer.header: Variant }
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; CHECK-NEXT: %iv.4 = add i64 %iv, 4
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; CHECK-NEXT: --> {{\{\{}}4,+,2}<%outer.header>,+,2}<%loop> U: [0,-1) S: [-9223372036854775808,9223372036854775807) Exits: <<Unknown>> LoopDispositions: { %loop: Computable, %outer.header: Variant }
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; CHECK-NEXT: %div.4 = udiv i64 %iv.4, 4
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; CHECK-NEXT: --> ({{\{\{}}4,+,2}<%outer.header>,+,2}<%loop> /u 4) U: [0,4611686018427387904) S: [0,4611686018427387904) Exits: <<Unknown>> LoopDispositions: { %loop: Computable, %outer.header: Variant }
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; CHECK-NEXT: %iv.5 = add i64 %iv, 5
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; CHECK-NEXT: --> {{\{\{}}5,+,2}<%outer.header>,+,2}<%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable, %outer.header: Variant }
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; CHECK-NEXT: %div.5 = udiv i64 %iv.5, 4
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; CHECK-NEXT: --> ({{\{\{}}5,+,2}<%outer.header>,+,2}<%loop> /u 4) U: [0,4611686018427387904) S: [0,4611686018427387904) Exits: <<Unknown>> LoopDispositions: { %loop: Computable, %outer.header: Variant }
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; CHECK-NEXT: %iv.neg.1 = add i64 %iv, -1
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; CHECK-NEXT: --> {{\{\{}}-1,+,2}<%outer.header>,+,2}<%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable, %outer.header: Variant }
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; CHECK-NEXT: %div.neg.1 = udiv i64 %iv.neg.1, 4
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; CHECK-NEXT: --> ({{\{\{}}-1,+,2}<%outer.header>,+,2}<%loop> /u 4) U: [0,4611686018427387904) S: [0,4611686018427387904) Exits: <<Unknown>> LoopDispositions: { %loop: Computable, %outer.header: Variant }
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; CHECK-NEXT: %div3.0 = udiv i64 %iv, 3
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; CHECK-NEXT: --> ({{\{\{}}0,+,2}<%outer.header>,+,2}<%loop> /u 3) U: [0,6148914691236517205) S: [0,6148914691236517206) Exits: <<Unknown>> LoopDispositions: { %loop: Computable, %outer.header: Variant }
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; CHECK-NEXT: %div3.1 = udiv i64 %iv.1, 3
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; CHECK-NEXT: --> ({{\{\{}}1,+,2}<%outer.header>,+,2}<%loop> /u 3) U: [0,6148914691236517206) S: [0,6148914691236517206) Exits: <<Unknown>> LoopDispositions: { %loop: Computable, %outer.header: Variant }
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; CHECK-NEXT: %div3.2 = udiv i64 %iv.2, 3
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; CHECK-NEXT: --> ({{\{\{}}2,+,2}<%outer.header>,+,2}<%loop> /u 3) U: [0,6148914691236517205) S: [0,6148914691236517206) Exits: <<Unknown>> LoopDispositions: { %loop: Computable, %outer.header: Variant }
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; CHECK-NEXT: %div3.4 = udiv i64 %iv.4, 3
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; CHECK-NEXT: --> ({{\{\{}}4,+,2}<%outer.header>,+,2}<%loop> /u 3) U: [0,6148914691236517205) S: [0,6148914691236517206) Exits: <<Unknown>> LoopDispositions: { %loop: Computable, %outer.header: Variant }
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; CHECK-NEXT: %div3.5 = udiv i64 %iv.5, 3
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; CHECK-NEXT: --> ({{\{\{}}5,+,2}<%outer.header>,+,2}<%loop> /u 3) U: [0,6148914691236517206) S: [0,6148914691236517206) Exits: <<Unknown>> LoopDispositions: { %loop: Computable, %outer.header: Variant }
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; CHECK-NEXT: %iv.next = add i64 %iv, 2
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; CHECK-NEXT: --> {{\{\{}}2,+,2}<%outer.header>,+,2}<%loop> U: [0,-1) S: [-9223372036854775808,9223372036854775807) Exits: <<Unknown>> LoopDispositions: { %loop: Computable, %outer.header: Variant }
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; CHECK-NEXT: %outer.iv.next = add i64 %outer.iv, 2
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; CHECK-NEXT: --> {2,+,2}<%outer.header> U: [0,-1) S: [-9223372036854775808,9223372036854775807) Exits: <<Unknown>> LoopDispositions: { %outer.header: Computable, %loop: Invariant }
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; CHECK-NEXT: Determining loop execution counts for: @test_step2_div4_start_outer_add_rec_step_2
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; CHECK-NEXT: Loop %loop: Unpredictable backedge-taken count.
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; CHECK-NEXT: Loop %loop: Unpredictable constant max backedge-taken count.
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; CHECK-NEXT: Loop %loop: Unpredictable symbolic max backedge-taken count.
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; CHECK-NEXT: Loop %outer.header: Unpredictable backedge-taken count.
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; CHECK-NEXT: Loop %outer.header: Unpredictable constant max backedge-taken count.
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; CHECK-NEXT: Loop %outer.header: Unpredictable symbolic max backedge-taken count.
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; CHECK-NEXT: Loop %outer.header: Predicated backedge-taken count is (%m /u 2)
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; CHECK-NEXT: Predicates:
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; CHECK-NEXT: Equal predicate: (zext i1 (trunc i64 %m to i1) to i64) == 0
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; CHECK-NEXT: Loop %outer.header: Predicated constant max backedge-taken count is i64 9223372036854775807
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; CHECK-NEXT: Predicates:
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; CHECK-NEXT: Equal predicate: (zext i1 (trunc i64 %m to i1) to i64) == 0
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; CHECK-NEXT: Loop %outer.header: Predicated symbolic max backedge-taken count is (%m /u 2)
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; CHECK-NEXT: Predicates:
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; CHECK-NEXT: Equal predicate: (zext i1 (trunc i64 %m to i1) to i64) == 0
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;
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entry:
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br label %outer.header
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outer.header:
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%outer.iv = phi i64 [ 0, %entry ], [ %outer.iv.next, %outer.latch ]
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br label %loop
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loop:
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%iv = phi i64 [ %outer.iv, %outer.header ], [ %iv.next, %loop ]
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%div.0 = udiv i64 %iv, 4
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call void @use(i64 %div.0)
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%iv.1 = add i64 %iv, 1
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%div.1 = udiv i64 %iv.1, 4
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call void @use(i64 %div.1)
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%iv.2 = add i64 %iv, 2
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%div.2 = udiv i64 %iv.2, 4
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call void @use(i64 %div.2)
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%iv.3 = add i64 %iv, 3
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%div.3 = udiv i64 %iv.3, 4
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call void @use(i64 %div.3)
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%iv.4 = add i64 %iv, 4
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%div.4 = udiv i64 %iv.4, 4
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call void @use(i64 %div.4)
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%iv.5 = add i64 %iv, 5
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%div.5 = udiv i64 %iv.5, 4
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call void @use(i64 %div.5)
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%iv.neg.1 = add i64 %iv, -1
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%div.neg.1 = udiv i64 %iv.neg.1, 4
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call void @use(i64 %div.neg.1)
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%div3.0 = udiv i64 %iv, 3
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call void @use(i64 %div3.0)
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%div3.1 = udiv i64 %iv.1,3
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call void @use(i64 %div3.1)
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%div3.2 = udiv i64 %iv.2, 3
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call void @use(i64 %div3.2)
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%div3.4 = udiv i64 %iv.4, 3
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call void @use(i64 %div3.4)
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%div3.5 = udiv i64 %iv.5, 3
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call void @use(i64 %div3.5)
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call void @use(i64 %div.neg.1)
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%iv.next = add i64 %iv, 2
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%cond = icmp slt i64 %iv, %n
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br i1 %cond, label %loop, label %outer.latch
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outer.latch:
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%outer.iv.next = add i64 %outer.iv, 2
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%outer.ec = icmp eq i64 %outer.iv, %m
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br i1 %outer.ec, label %exit, label %outer.header
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exit:
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ret void
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}

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