derek.holloway
7502bf64a4
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40 lines
1.4 KiB
LLVM
40 lines
1.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 5
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; RUN: opt -passes='print<scalar-evolution>' \
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; RUN: -scalar-evolution-classify-expressions=0 -disable-output %s 2>&1 | FileCheck %s
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define void @infer_via_ranges(ptr %arr, i32 %n) {
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; CHECK-LABEL: 'infer_via_ranges'
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; CHECK-NEXT: Determining loop execution counts for: @infer_via_ranges
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; CHECK-NEXT: Loop %loop: <multiple exits> backedge-taken count is ((-1 + %n) umin %n)
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; CHECK-NEXT: exit count for loop: %n
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; CHECK-NEXT: exit count for in.bounds: (-1 + %n)
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; CHECK-NEXT: Loop %loop: constant max backedge-taken count is i32 -2147483648
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; CHECK-NEXT: Loop %loop: symbolic max backedge-taken count is ((-1 + %n) umin %n)
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; CHECK-NEXT: symbolic max exit count for loop: %n
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; CHECK-NEXT: symbolic max exit count for in.bounds: (-1 + %n)
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; CHECK-NEXT: Loop %loop: Trip multiple is 1
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;
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entry:
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%first.itr.check = icmp sgt i32 %n, 0
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%start = sub i32 %n, 1
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br i1 %first.itr.check, label %loop, label %exit
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loop:
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%idx = phi i32 [ %start, %entry ] , [ %idx.dec, %in.bounds ]
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%idx.dec = sub i32 %idx, 1
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%abc = icmp sge i32 %idx, 0
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br i1 %abc, label %in.bounds, label %out.of.bounds
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in.bounds:
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%addr = getelementptr i32, ptr %arr, i32 %idx
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store i32 0, ptr %addr
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%next = icmp sgt i32 %idx.dec, -1
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br i1 %next, label %loop, label %exit
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out.of.bounds:
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ret void
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exit:
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ret void
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}
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