derek.holloway
7502bf64a4
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39 lines
1.1 KiB
LLVM
39 lines
1.1 KiB
LLVM
; RUN: opt -passes='print<access-info>' -disable-output < %s 2>&1 | FileCheck %s
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; Handle memchecks involving loop-invariant addresses:
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;
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; extern int *A, *b;
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; for (i = 0; i < N; ++i) {
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; A[i] = b;
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; }
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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; CHECK: Memory dependences are safe with run-time checks
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; CHECK: Run-time memory checks:
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; CHECK-NEXT: Check 0:
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; CHECK-NEXT: Comparing group
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; CHECK-NEXT: %arrayidxA = getelementptr inbounds i32, ptr %a, i64 %ind
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; CHECK-NEXT: Against group
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; CHECK-NEXT: ptr %b
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define void @f(ptr %a, ptr %b) {
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entry:
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%ind = phi i64 [ 0, %entry ], [ %inc, %for.body ]
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%arrayidxA = getelementptr inbounds i32, ptr %a, i64 %ind
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%loadB = load i32, ptr %b, align 4
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store i32 %loadB, ptr %arrayidxA, align 4
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%inc = add nuw nsw i64 %ind, 1
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%exitcond = icmp eq i64 %inc, 20
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.body
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ret void
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}
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