derek.holloway
7502bf64a4
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28 lines
969 B
LLVM
28 lines
969 B
LLVM
; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 5
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; RUN: opt < %s -disable-output "-passes=print<da>" 2>&1 | FileCheck %s
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; Test case for SmallBitVector bounds checking bug in DependenceAnalysis.
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; This test ensures that loop index mapping functions don't cause out-of-bounds
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; access to SmallBitVector when loop depths exceed MaxLevels.
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define void @bounds_check_test(ptr %a) {
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; CHECK-LABEL: 'bounds_check_test'
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; CHECK-NEXT: Src: store i8 0, ptr %idx, align 1 --> Dst: store i8 0, ptr %idx, align 1
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; CHECK-NEXT: da analyze - output [*]!
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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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%i = phi i64 [ 0, %entry ], [ %i.next, %loop ]
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%and = and i64 %i, 1 ; Creates index 0 or 1
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%idx = getelementptr inbounds [4 x [4 x i8]], ptr %a, i64 0, i64 %and, i64 %i
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store i8 0, ptr %idx
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%i.next = add i64 %i, 1
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%exitcond.not = icmp slt i64 %i.next, 4
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br i1 %exitcond.not, label %loop, label %exit
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exit:
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ret void
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}
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