derek.holloway
7502bf64a4
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388 lines
19 KiB
LLVM
388 lines
19 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 4
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; RUN: opt "-passes=print<scalar-evolution>" -disable-output -S %s 2>&1 | FileCheck %s
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; PR59777
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define i2 @iv_nsw_poison(i2 %arg) {
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; CHECK-LABEL: 'iv_nsw_poison'
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; CHECK-NEXT: Classifying expressions for: @iv_nsw_poison
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; CHECK-NEXT: %.07 = phi i2 [ 1, %bb ], [ %i, %bb1 ]
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; CHECK-NEXT: --> {1,+,1}<nuw><nsw><%bb1> U: [1,-2) S: [1,-2) Exits: <<Unknown>> LoopDispositions: { %bb1: Computable }
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; CHECK-NEXT: %.0 = phi i2 [ 1, %bb ], [ %i2, %bb1 ]
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; CHECK-NEXT: --> {1,+,1}<nuw><nsw><%bb1> U: [1,-2) S: [1,-2) Exits: <<Unknown>> LoopDispositions: { %bb1: Computable }
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; CHECK-NEXT: %i = add nsw i2 %.07, 1
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; CHECK-NEXT: --> {-2,+,1}<nuw><%bb1> U: [-2,0) S: [-2,0) Exits: <<Unknown>> LoopDispositions: { %bb1: Computable }
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; CHECK-NEXT: %i2 = add i2 %.0, 1
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; CHECK-NEXT: --> {-2,+,1}<nuw><%bb1> U: [-2,0) S: [-2,0) Exits: <<Unknown>> LoopDispositions: { %bb1: Computable }
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; CHECK-NEXT: Determining loop execution counts for: @iv_nsw_poison
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; CHECK-NEXT: Loop %bb1: Unpredictable backedge-taken count.
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; CHECK-NEXT: Loop %bb1: Unpredictable constant max backedge-taken count.
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; CHECK-NEXT: Loop %bb1: Unpredictable symbolic max backedge-taken count.
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;
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bb:
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br label %bb1
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bb1: ; preds = %bb1, %bb
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%.07 = phi i2 [ 1, %bb ], [ %i, %bb1 ]
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%.0 = phi i2 [ 1, %bb ], [ %i2, %bb1 ]
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%i = add nsw i2 %.07, 1
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%i2 = add i2 %.0, 1
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%.not.not = icmp ult i2 %.07, %arg
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br i1 %.not.not, label %common.ret, label %bb1
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common.ret: ; preds = %bb1
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ret i2 %i2
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}
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define i4 @iv_nsw_poison2(i4 %0, i4 %end, i4 %start) {
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; CHECK-LABEL: 'iv_nsw_poison2'
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; CHECK-NEXT: Classifying expressions for: @iv_nsw_poison2
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; CHECK-NEXT: %iv.0 = phi i4 [ %start, %entry ], [ %iv.0.next, %loop ]
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; CHECK-NEXT: --> {%start,+,1}<%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: %iv.1 = phi i4 [ %start, %entry ], [ %iv.1.next, %loop ]
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; CHECK-NEXT: --> {%start,+,1}<nsw><%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: %iv.0.next = add i4 %iv.0, 1
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; CHECK-NEXT: --> {(1 + %start),+,1}<nw><%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: %iv.1.next = add nsw i4 %iv.1, 1
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; CHECK-NEXT: --> {(1 + %start),+,1}<nw><%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: Determining loop execution counts for: @iv_nsw_poison2
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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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;
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entry:
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br label %loop
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loop:
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%iv.0 = phi i4 [ %start, %entry ], [ %iv.0.next, %loop ]
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%iv.1 = phi i4 [ %start, %entry ], [ %iv.1.next, %loop ]
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%iv.0.next = add i4 %iv.0, 1
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%iv.1.next = add nsw i4 %iv.1, 1
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%.not.not = icmp ult i4 %iv.0, %end
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br i1 %.not.not, label %exit, label %loop
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exit:
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ret i4 %iv.1.next
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}
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define i2 @iv_both_adds_nsw(i2 %arg) {
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; CHECK-LABEL: 'iv_both_adds_nsw'
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; CHECK-NEXT: Classifying expressions for: @iv_both_adds_nsw
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; CHECK-NEXT: %iv.0 = phi i2 [ 1, %bb ], [ %iv.0.next, %loop ]
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; CHECK-NEXT: --> {1,+,1}<nuw><nsw><%loop> U: [1,-2) S: [1,-2) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: %iv.1 = phi i2 [ 1, %bb ], [ %iv.1.next, %loop ]
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; CHECK-NEXT: --> {1,+,1}<nuw><nsw><%loop> U: [1,-2) S: [1,-2) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: %iv.0.next = add nsw i2 %iv.0, 1
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; CHECK-NEXT: --> {-2,+,1}<nuw><%loop> U: [-2,0) S: [-2,0) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: %iv.1.next = add nsw i2 %iv.1, 1
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; CHECK-NEXT: --> {-2,+,1}<nuw><%loop> U: [-2,0) S: [-2,0) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: Determining loop execution counts for: @iv_both_adds_nsw
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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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;
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bb:
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br label %loop
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loop:
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%iv.0 = phi i2 [ 1, %bb ], [ %iv.0.next, %loop ]
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%iv.1 = phi i2 [ 1, %bb ], [ %iv.1.next, %loop ]
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%iv.0.next = add nsw i2 %iv.0, 1
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%iv.1.next = add nsw i2 %iv.1, 1
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%.not.not = icmp ult i2 %iv.0, %arg
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br i1 %.not.not, label %exit, label %loop
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exit:
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ret i2 %iv.1.next
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}
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define i4 @iv_both_adds_nsw_extra_use(i4 %arg) {
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; CHECK-LABEL: 'iv_both_adds_nsw_extra_use'
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; CHECK-NEXT: Classifying expressions for: @iv_both_adds_nsw_extra_use
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; CHECK-NEXT: %iv.0 = phi i4 [ 1, %bb ], [ %iv.0.next, %loop ]
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; CHECK-NEXT: --> {1,+,1}<nuw><nsw><%loop> U: [1,-8) S: [1,-8) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: %iv.1 = phi i4 [ 1, %bb ], [ %iv.1.next, %loop ]
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; CHECK-NEXT: --> {1,+,1}<nuw><nsw><%loop> U: [1,-8) S: [1,-8) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: %iv.0.next = add nsw i4 %iv.0, 1
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; CHECK-NEXT: --> {2,+,1}<nuw><%loop> U: [2,0) S: [2,0) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: %iv.1.next = add nsw i4 %iv.1, 1
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; CHECK-NEXT: --> {2,+,1}<nuw><%loop> U: [2,0) S: [2,0) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: Determining loop execution counts for: @iv_both_adds_nsw_extra_use
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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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;
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bb:
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br label %loop
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loop:
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%iv.0 = phi i4 [ 1, %bb ], [ %iv.0.next, %loop ]
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%iv.1 = phi i4 [ 1, %bb ], [ %iv.1.next, %loop ]
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%iv.0.next = add nsw i4 %iv.0, 1
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call void @use(i4 %iv.0.next)
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%iv.1.next = add nsw i4 %iv.1, 1
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call void @use(i4 %iv.1.next)
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%.not.not = icmp ult i4 %iv.0, %arg
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br i1 %.not.not, label %exit, label %loop
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exit:
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ret i4 %iv.1.next
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}
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define i4 @iv_both_adds_nsw_extra_use_incs_reordered(i4 %arg) {
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; CHECK-LABEL: 'iv_both_adds_nsw_extra_use_incs_reordered'
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; CHECK-NEXT: Classifying expressions for: @iv_both_adds_nsw_extra_use_incs_reordered
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; CHECK-NEXT: %iv.0 = phi i4 [ 1, %bb ], [ %iv.0.next, %loop ]
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; CHECK-NEXT: --> {1,+,1}<nuw><nsw><%loop> U: [1,-8) S: [1,-8) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: %iv.1 = phi i4 [ 1, %bb ], [ %iv.1.next, %loop ]
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; CHECK-NEXT: --> {1,+,1}<nuw><nsw><%loop> U: [1,-8) S: [1,-8) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: %iv.1.next = add nsw i4 %iv.1, 1
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; CHECK-NEXT: --> {2,+,1}<nuw><%loop> U: [2,0) S: [2,0) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: %iv.0.next = add nsw i4 %iv.0, 1
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; CHECK-NEXT: --> {2,+,1}<nuw><%loop> U: [2,0) S: [2,0) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: Determining loop execution counts for: @iv_both_adds_nsw_extra_use_incs_reordered
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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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;
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bb:
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br label %loop
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loop:
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%iv.0 = phi i4 [ 1, %bb ], [ %iv.0.next, %loop ]
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%iv.1 = phi i4 [ 1, %bb ], [ %iv.1.next, %loop ]
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%iv.1.next = add nsw i4 %iv.1, 1
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call void @use(i4 %iv.1.next)
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%iv.0.next = add nsw i4 %iv.0, 1
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call void @use(i4 %iv.0.next)
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%.not.not = icmp ult i4 %iv.0, %arg
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br i1 %.not.not, label %exit, label %loop
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exit:
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ret i4 %iv.1.next
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}
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define i4 @iv_nsw_poison_extra_use(i4 %0, i4 %end, i4 %start) {
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; CHECK-LABEL: 'iv_nsw_poison_extra_use'
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; CHECK-NEXT: Classifying expressions for: @iv_nsw_poison_extra_use
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; CHECK-NEXT: %iv.0 = phi i4 [ %start, %entry ], [ %iv.0.next, %loop ]
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; CHECK-NEXT: --> {%start,+,1}<%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: %iv.1 = phi i4 [ %start, %entry ], [ %iv.1.next, %loop ]
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; CHECK-NEXT: --> {%start,+,1}<nsw><%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: %iv.0.next = add i4 %iv.0, 1
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; CHECK-NEXT: --> {(1 + %start),+,1}<nw><%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: %iv.1.next = add nsw i4 %iv.1, 1
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; CHECK-NEXT: --> {(1 + %start),+,1}<nw><%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: Determining loop execution counts for: @iv_nsw_poison_extra_use
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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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;
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entry:
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br label %loop
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loop:
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%iv.0 = phi i4 [ %start, %entry ], [ %iv.0.next, %loop ]
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%iv.1 = phi i4 [ %start, %entry ], [ %iv.1.next, %loop ]
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%iv.0.next = add i4 %iv.0, 1
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call void @use(i4 %iv.0.next)
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%iv.1.next = add nsw i4 %iv.1, 1
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%.not.not = icmp ult i4 %iv.0, %end
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br i1 %.not.not, label %exit, label %loop
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exit:
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ret i4 %iv.1.next
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}
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declare void @use(i4)
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define i2 @iv_nuw_poison(i2 %arg, i2 %start) {
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; CHECK-LABEL: 'iv_nuw_poison'
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; CHECK-NEXT: Classifying expressions for: @iv_nuw_poison
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; CHECK-NEXT: %.07 = phi i2 [ %start, %bb ], [ %i, %bb1 ]
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; CHECK-NEXT: --> {%start,+,1}<nuw><%bb1> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %bb1: Computable }
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; CHECK-NEXT: %.0 = phi i2 [ %start, %bb ], [ %i2, %bb1 ]
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; CHECK-NEXT: --> {%start,+,1}<nuw><%bb1> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %bb1: Computable }
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; CHECK-NEXT: %i = add nuw i2 %.07, 1
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; CHECK-NEXT: --> {(1 + %start),+,1}<nw><%bb1> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %bb1: Computable }
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; CHECK-NEXT: %i2 = add i2 %.0, 1
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; CHECK-NEXT: --> {(1 + %start),+,1}<nw><%bb1> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %bb1: Computable }
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; CHECK-NEXT: Determining loop execution counts for: @iv_nuw_poison
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; CHECK-NEXT: Loop %bb1: Unpredictable backedge-taken count.
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; CHECK-NEXT: Loop %bb1: Unpredictable constant max backedge-taken count.
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; CHECK-NEXT: Loop %bb1: Unpredictable symbolic max backedge-taken count.
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;
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bb:
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br label %bb1
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bb1: ; preds = %bb1, %bb
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%.07 = phi i2 [ %start, %bb ], [ %i, %bb1 ]
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%.0 = phi i2 [ %start, %bb ], [ %i2, %bb1 ]
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%i = add nuw i2 %.07, 1
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%i2 = add i2 %.0, 1
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%.not.not = icmp ult i2 %.07, %arg
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br i1 %.not.not, label %common.ret, label %bb1
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common.ret: ; preds = %bb1
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ret i2 %i2
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}
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define i4 @iv_nuw_poison2(i4 %0, i4 %end, i4 %start) {
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; CHECK-LABEL: 'iv_nuw_poison2'
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; CHECK-NEXT: Classifying expressions for: @iv_nuw_poison2
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; CHECK-NEXT: %iv.0 = phi i4 [ %start, %entry ], [ %iv.0.next, %loop ]
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; CHECK-NEXT: --> {%start,+,1}<%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: %iv.1 = phi i4 [ %start, %entry ], [ %iv.1.next, %loop ]
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; CHECK-NEXT: --> {%start,+,1}<nuw><%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: %iv.0.next = add i4 %iv.0, 1
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; CHECK-NEXT: --> {(1 + %start),+,1}<nw><%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: %iv.1.next = add nuw i4 %iv.1, 1
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; CHECK-NEXT: --> {(1 + %start),+,1}<nw><%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: Determining loop execution counts for: @iv_nuw_poison2
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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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;
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entry:
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br label %loop
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loop:
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%iv.0 = phi i4 [ %start, %entry ], [ %iv.0.next, %loop ]
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%iv.1 = phi i4 [ %start, %entry ], [ %iv.1.next, %loop ]
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%iv.0.next = add i4 %iv.0, 1
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%iv.1.next = add nuw i4 %iv.1, 1
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%.not.not = icmp ult i4 %iv.0, %end
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br i1 %.not.not, label %exit, label %loop
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exit:
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ret i4 %iv.1.next
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}
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define i2 @iv_both_adds_nuw(i2 %arg, i2 %start) {
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; CHECK-LABEL: 'iv_both_adds_nuw'
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; CHECK-NEXT: Classifying expressions for: @iv_both_adds_nuw
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; CHECK-NEXT: %iv.0 = phi i2 [ %start, %bb ], [ %iv.0.next, %loop ]
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; CHECK-NEXT: --> {%start,+,1}<nuw><%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: %iv.1 = phi i2 [ %start, %bb ], [ %iv.1.next, %loop ]
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; CHECK-NEXT: --> {%start,+,1}<nuw><%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: %iv.0.next = add nuw i2 %iv.0, 1
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; CHECK-NEXT: --> {(1 + %start),+,1}<nw><%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: %iv.1.next = add nuw i2 %iv.1, 1
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; CHECK-NEXT: --> {(1 + %start),+,1}<nw><%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: Determining loop execution counts for: @iv_both_adds_nuw
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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.
|
|
; CHECK-NEXT: Loop %loop: Unpredictable symbolic max backedge-taken count.
|
|
;
|
|
bb:
|
|
br label %loop
|
|
|
|
loop:
|
|
%iv.0 = phi i2 [ %start, %bb ], [ %iv.0.next, %loop ]
|
|
%iv.1 = phi i2 [ %start, %bb ], [ %iv.1.next, %loop ]
|
|
%iv.0.next = add nuw i2 %iv.0, 1
|
|
%iv.1.next = add nuw i2 %iv.1, 1
|
|
%.not.not = icmp ult i2 %iv.0, %arg
|
|
br i1 %.not.not, label %exit, label %loop
|
|
|
|
exit:
|
|
ret i2 %iv.1.next
|
|
}
|
|
|
|
define i4 @iv_both_adds_nuw_extra_use(i4 %arg, i4 %start) {
|
|
; CHECK-LABEL: 'iv_both_adds_nuw_extra_use'
|
|
; CHECK-NEXT: Classifying expressions for: @iv_both_adds_nuw_extra_use
|
|
; CHECK-NEXT: %iv.0 = phi i4 [ %start, %bb ], [ %iv.0.next, %loop ]
|
|
; CHECK-NEXT: --> {%start,+,1}<nuw><%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
|
|
; CHECK-NEXT: %iv.1 = phi i4 [ %start, %bb ], [ %iv.1.next, %loop ]
|
|
; CHECK-NEXT: --> {%start,+,1}<nuw><%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
|
|
; CHECK-NEXT: %iv.0.next = add nuw i4 %iv.0, 1
|
|
; CHECK-NEXT: --> {(1 + %start),+,1}<nw><%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
|
|
; CHECK-NEXT: %iv.1.next = add nuw i4 %iv.1, 1
|
|
; CHECK-NEXT: --> {(1 + %start),+,1}<nw><%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
|
|
; CHECK-NEXT: Determining loop execution counts for: @iv_both_adds_nuw_extra_use
|
|
; CHECK-NEXT: Loop %loop: Unpredictable backedge-taken count.
|
|
; CHECK-NEXT: Loop %loop: Unpredictable constant max backedge-taken count.
|
|
; CHECK-NEXT: Loop %loop: Unpredictable symbolic max backedge-taken count.
|
|
;
|
|
bb:
|
|
br label %loop
|
|
|
|
loop:
|
|
%iv.0 = phi i4 [ %start, %bb ], [ %iv.0.next, %loop ]
|
|
%iv.1 = phi i4 [ %start, %bb ], [ %iv.1.next, %loop ]
|
|
%iv.0.next = add nuw i4 %iv.0, 1
|
|
call void @use(i4 %iv.0.next)
|
|
%iv.1.next = add nuw i4 %iv.1, 1
|
|
call void @use(i4 %iv.1.next)
|
|
%.not.not = icmp ult i4 %iv.0, %arg
|
|
br i1 %.not.not, label %exit, label %loop
|
|
|
|
exit:
|
|
ret i4 %iv.1.next
|
|
}
|
|
|
|
define i4 @iv_both_adds_nuw_extra_use_incs_reordered(i4 %arg, i4 %start) {
|
|
; CHECK-LABEL: 'iv_both_adds_nuw_extra_use_incs_reordered'
|
|
; CHECK-NEXT: Classifying expressions for: @iv_both_adds_nuw_extra_use_incs_reordered
|
|
; CHECK-NEXT: %iv.0 = phi i4 [ %start, %bb ], [ %iv.0.next, %loop ]
|
|
; CHECK-NEXT: --> {%start,+,1}<nuw><%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
|
|
; CHECK-NEXT: %iv.1 = phi i4 [ %start, %bb ], [ %iv.1.next, %loop ]
|
|
; CHECK-NEXT: --> {%start,+,1}<nuw><%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
|
|
; CHECK-NEXT: %iv.1.next = add nuw i4 %iv.1, 1
|
|
; CHECK-NEXT: --> {(1 + %start),+,1}<nw><%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
|
|
; CHECK-NEXT: %iv.0.next = add nuw i4 %iv.0, 1
|
|
; CHECK-NEXT: --> {(1 + %start),+,1}<nw><%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
|
|
; CHECK-NEXT: Determining loop execution counts for: @iv_both_adds_nuw_extra_use_incs_reordered
|
|
; CHECK-NEXT: Loop %loop: Unpredictable backedge-taken count.
|
|
; CHECK-NEXT: Loop %loop: Unpredictable constant max backedge-taken count.
|
|
; CHECK-NEXT: Loop %loop: Unpredictable symbolic max backedge-taken count.
|
|
;
|
|
bb:
|
|
br label %loop
|
|
|
|
loop:
|
|
%iv.0 = phi i4 [ %start, %bb ], [ %iv.0.next, %loop ]
|
|
%iv.1 = phi i4 [ %start, %bb ], [ %iv.1.next, %loop ]
|
|
%iv.1.next = add nuw i4 %iv.1, 1
|
|
call void @use(i4 %iv.1.next)
|
|
%iv.0.next = add nuw i4 %iv.0, 1
|
|
call void @use(i4 %iv.0.next)
|
|
%.not.not = icmp ult i4 %iv.0, %arg
|
|
br i1 %.not.not, label %exit, label %loop
|
|
|
|
exit:
|
|
ret i4 %iv.1.next
|
|
}
|
|
|
|
define i4 @iv_nuw_poison_extra_use(i4 %0, i4 %end, i4 %start) {
|
|
; CHECK-LABEL: 'iv_nuw_poison_extra_use'
|
|
; CHECK-NEXT: Classifying expressions for: @iv_nuw_poison_extra_use
|
|
; CHECK-NEXT: %iv.0 = phi i4 [ %start, %entry ], [ %iv.0.next, %loop ]
|
|
; CHECK-NEXT: --> {%start,+,1}<%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
|
|
; CHECK-NEXT: %iv.1 = phi i4 [ %start, %entry ], [ %iv.1.next, %loop ]
|
|
; CHECK-NEXT: --> {%start,+,1}<nuw><%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
|
|
; CHECK-NEXT: %iv.0.next = add i4 %iv.0, 1
|
|
; CHECK-NEXT: --> {(1 + %start),+,1}<nw><%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
|
|
; CHECK-NEXT: %iv.1.next = add nuw i4 %iv.1, 1
|
|
; CHECK-NEXT: --> {(1 + %start),+,1}<nw><%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
|
|
; CHECK-NEXT: Determining loop execution counts for: @iv_nuw_poison_extra_use
|
|
; CHECK-NEXT: Loop %loop: Unpredictable backedge-taken count.
|
|
; CHECK-NEXT: Loop %loop: Unpredictable constant max backedge-taken count.
|
|
; CHECK-NEXT: Loop %loop: Unpredictable symbolic max backedge-taken count.
|
|
;
|
|
entry:
|
|
br label %loop
|
|
|
|
loop:
|
|
%iv.0 = phi i4 [ %start, %entry ], [ %iv.0.next, %loop ]
|
|
%iv.1 = phi i4 [ %start, %entry ], [ %iv.1.next, %loop ]
|
|
%iv.0.next = add i4 %iv.0, 1
|
|
call void @use(i4 %iv.0.next)
|
|
%iv.1.next = add nuw i4 %iv.1, 1
|
|
%.not.not = icmp ult i4 %iv.0, %end
|
|
br i1 %.not.not, label %exit, label %loop
|
|
|
|
exit:
|
|
ret i4 %iv.1.next
|
|
}
|