derek.holloway
7502bf64a4
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213 lines
9.3 KiB
LLVM
213 lines
9.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py
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; RUN: opt -S -passes='print<scalar-evolution>' -disable-output < %s 2>&1 | FileCheck %s
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; Test non-unit strides in multiple-exit loops, and the interaction with
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; nowrap flags.
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define void @test_preinc_ult(i64 %len) {
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; CHECK-LABEL: 'test_preinc_ult'
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; CHECK-NEXT: Classifying expressions for: @test_preinc_ult
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; CHECK-NEXT: %iv = phi i64 [ 0, %start ], [ %iv.inc2, %latch ]
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; CHECK-NEXT: --> {0,+,2}<nuw><%loop> U: [0,-1) S: [-9223372036854775808,9223372036854775807) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: %iv.inc2 = add nuw i64 %iv, 2
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; CHECK-NEXT: --> {2,+,2}<nw><%loop> U: [0,-1) S: [-9223372036854775808,9223372036854775807) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: Determining loop execution counts for: @test_preinc_ult
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; CHECK-NEXT: Loop %loop: <multiple exits> Unpredictable backedge-taken count.
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; CHECK-NEXT: exit count for loop: ***COULDNOTCOMPUTE***
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; CHECK-NEXT: exit count for latch: ***COULDNOTCOMPUTE***
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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: symbolic max exit count for loop: ***COULDNOTCOMPUTE***
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; CHECK-NEXT: symbolic max exit count for latch: ***COULDNOTCOMPUTE***
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;
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start:
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br label %loop
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loop:
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%iv = phi i64 [ 0, %start ], [ %iv.inc2, %latch ]
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%cmp1 = icmp ult i64 %iv, %len
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br i1 %cmp1, label %latch, label %exit
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latch:
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%iv.inc2 = add nuw i64 %iv, 2
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%cmp2 = icmp ult i64 %iv.inc2, %len
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br i1 %cmp2, label %loop, label %exit
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exit:
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ret void
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}
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define void @test_postinc_ult(i64 %len) {
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; CHECK-LABEL: 'test_postinc_ult'
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; CHECK-NEXT: Classifying expressions for: @test_postinc_ult
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; CHECK-NEXT: %iv = phi i64 [ 0, %start ], [ %iv.inc2, %latch ]
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; CHECK-NEXT: --> {0,+,2}<nuw><%loop> U: [0,-1) S: [-9223372036854775808,9223372036854775807) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: %iv.inc = add nuw i64 %iv, 1
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; CHECK-NEXT: --> {1,+,2}<nuw><%loop> U: [1,0) S: [1,0) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: %iv.inc2 = add nuw i64 %iv, 2
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; CHECK-NEXT: --> {2,+,2}<nw><%loop> U: [0,-1) S: [-9223372036854775808,9223372036854775807) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: Determining loop execution counts for: @test_postinc_ult
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; CHECK-NEXT: Loop %loop: <multiple exits> Unpredictable backedge-taken count.
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; CHECK-NEXT: exit count for loop: ***COULDNOTCOMPUTE***
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; CHECK-NEXT: exit count for latch: ***COULDNOTCOMPUTE***
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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: symbolic max exit count for loop: ***COULDNOTCOMPUTE***
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; CHECK-NEXT: symbolic max exit count for latch: ***COULDNOTCOMPUTE***
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;
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start:
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br label %loop
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loop:
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%iv = phi i64 [ 0, %start ], [ %iv.inc2, %latch ]
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%iv.inc = add nuw i64 %iv, 1
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%cmp1 = icmp ult i64 %iv.inc, %len
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br i1 %cmp1, label %latch, label %exit
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latch:
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%iv.inc2 = add nuw i64 %iv, 2
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%cmp2 = icmp ult i64 %iv.inc2, %len
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br i1 %cmp2, label %loop, label %exit
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exit:
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ret void
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}
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define void @test_preinc_slt(i64 %len) {
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; CHECK-LABEL: 'test_preinc_slt'
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; CHECK-NEXT: Classifying expressions for: @test_preinc_slt
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; CHECK-NEXT: %iv = phi i64 [ 0, %start ], [ %iv.inc2, %latch ]
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; CHECK-NEXT: --> {0,+,2}<nuw><nsw><%loop> U: [0,-9223372036854775808) S: [0,9223372036854775807) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: %iv.inc2 = add nsw i64 %iv, 2
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; CHECK-NEXT: --> {2,+,2}<nuw><%loop> U: [2,-1) S: [-9223372036854775808,9223372036854775807) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: Determining loop execution counts for: @test_preinc_slt
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; CHECK-NEXT: Loop %loop: <multiple exits> Unpredictable backedge-taken count.
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; CHECK-NEXT: exit count for loop: ***COULDNOTCOMPUTE***
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; CHECK-NEXT: exit count for latch: ***COULDNOTCOMPUTE***
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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: symbolic max exit count for loop: ***COULDNOTCOMPUTE***
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; CHECK-NEXT: symbolic max exit count for latch: ***COULDNOTCOMPUTE***
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;
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start:
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br label %loop
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loop:
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%iv = phi i64 [ 0, %start ], [ %iv.inc2, %latch ]
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%cmp1 = icmp slt i64 %iv, %len
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br i1 %cmp1, label %latch, label %exit
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latch:
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%iv.inc2 = add nsw i64 %iv, 2
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%cmp2 = icmp slt i64 %iv.inc2, %len
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br i1 %cmp2, label %loop, label %exit
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exit:
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ret void
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}
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define void @test_postinc_slt(i64 %len) {
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; CHECK-LABEL: 'test_postinc_slt'
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; CHECK-NEXT: Classifying expressions for: @test_postinc_slt
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; CHECK-NEXT: %iv = phi i64 [ 0, %start ], [ %iv.inc2, %latch ]
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; CHECK-NEXT: --> {0,+,2}<nuw><nsw><%loop> U: [0,-9223372036854775808) S: [0,9223372036854775807) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: %iv.inc = add nsw i64 %iv, 1
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; CHECK-NEXT: --> {1,+,2}<nuw><nsw><%loop> U: [1,-9223372036854775808) S: [1,-9223372036854775808) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: %iv.inc2 = add nsw i64 %iv, 2
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; CHECK-NEXT: --> {2,+,2}<nuw><%loop> U: [2,-1) S: [-9223372036854775808,9223372036854775807) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: Determining loop execution counts for: @test_postinc_slt
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; CHECK-NEXT: Loop %loop: <multiple exits> Unpredictable backedge-taken count.
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; CHECK-NEXT: exit count for loop: ***COULDNOTCOMPUTE***
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; CHECK-NEXT: exit count for latch: ***COULDNOTCOMPUTE***
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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: symbolic max exit count for loop: ***COULDNOTCOMPUTE***
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; CHECK-NEXT: symbolic max exit count for latch: ***COULDNOTCOMPUTE***
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;
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start:
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br label %loop
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loop:
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%iv = phi i64 [ 0, %start ], [ %iv.inc2, %latch ]
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%iv.inc = add nsw i64 %iv, 1
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%cmp1 = icmp slt i64 %iv.inc, %len
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br i1 %cmp1, label %latch, label %exit
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latch:
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%iv.inc2 = add nsw i64 %iv, 2
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%cmp2 = icmp slt i64 %iv.inc2, %len
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br i1 %cmp2, label %loop, label %exit
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exit:
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ret void
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}
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define void @test_preinc_sgt(i64 %lim) {
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; CHECK-LABEL: 'test_preinc_sgt'
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; CHECK-NEXT: Classifying expressions for: @test_preinc_sgt
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; CHECK-NEXT: %iv = phi i64 [ 0, %start ], [ %iv.inc2, %latch ]
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; CHECK-NEXT: --> {0,+,-2}<nsw><%loop> U: [0,-1) S: [-9223372036854775808,1) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: %iv.inc2 = add nsw i64 %iv, -2
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; CHECK-NEXT: --> {-2,+,-2}<nw><%loop> U: [0,-1) S: [-9223372036854775808,9223372036854775807) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: Determining loop execution counts for: @test_preinc_sgt
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; CHECK-NEXT: Loop %loop: <multiple exits> Unpredictable backedge-taken count.
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; CHECK-NEXT: exit count for loop: ***COULDNOTCOMPUTE***
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; CHECK-NEXT: exit count for latch: ***COULDNOTCOMPUTE***
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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: symbolic max exit count for loop: ***COULDNOTCOMPUTE***
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; CHECK-NEXT: symbolic max exit count for latch: ***COULDNOTCOMPUTE***
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;
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start:
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br label %loop
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loop:
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%iv = phi i64 [ 0, %start ], [ %iv.inc2, %latch ]
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%cmp1 = icmp sgt i64 %iv, %lim
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br i1 %cmp1, label %latch, label %exit
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latch:
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%iv.inc2 = add nsw i64 %iv, -2
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%cmp2 = icmp sgt i64 %iv.inc2, %lim
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br i1 %cmp2, label %loop, label %exit
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exit:
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ret void
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}
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define void @test_postinc_sgt(i64 %lim) {
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; CHECK-LABEL: 'test_postinc_sgt'
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; CHECK-NEXT: Classifying expressions for: @test_postinc_sgt
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; CHECK-NEXT: %iv = phi i64 [ 0, %start ], [ %iv.inc2, %latch ]
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; CHECK-NEXT: --> {0,+,-2}<nsw><%loop> U: [0,-1) S: [-9223372036854775808,1) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: %iv.inc = add nsw i64 %iv, -1
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; CHECK-NEXT: --> {-1,+,-2}<nsw><%loop> U: [-9223372036854775808,0) S: [-9223372036854775808,0) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: %iv.inc2 = add nsw i64 %iv, -2
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; CHECK-NEXT: --> {-2,+,-2}<nw><%loop> U: [0,-1) S: [-9223372036854775808,9223372036854775807) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: Determining loop execution counts for: @test_postinc_sgt
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; CHECK-NEXT: Loop %loop: <multiple exits> Unpredictable backedge-taken count.
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; CHECK-NEXT: exit count for loop: ***COULDNOTCOMPUTE***
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; CHECK-NEXT: exit count for latch: ***COULDNOTCOMPUTE***
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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: symbolic max exit count for loop: ***COULDNOTCOMPUTE***
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; CHECK-NEXT: symbolic max exit count for latch: ***COULDNOTCOMPUTE***
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;
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start:
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br label %loop
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loop:
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%iv = phi i64 [ 0, %start ], [ %iv.inc2, %latch ]
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%iv.inc = add nsw i64 %iv, -1
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%cmp1 = icmp sgt i64 %iv.inc, %lim
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br i1 %cmp1, label %latch, label %exit
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latch:
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%iv.inc2 = add nsw i64 %iv, -2
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%cmp2 = icmp sgt i64 %iv.inc2, %lim
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br i1 %cmp2, label %loop, label %exit
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exit:
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ret void
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}
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