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beyond their associated static array type. I believe that this fixes a legitimate bug, because BasicAliasAnalysis already has code to check for this condition that works for non-constant indices, however it was missing the case of constant indices. With this change, it checks for both. This fixes PR4267, and miscompiles of SPEC 188.ammp and 464.h264.href. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72451 91177308-0d34-0410-b5e6-96231b3b80d8
28 lines
716 B
LLVM
28 lines
716 B
LLVM
; RUN: llvm-as < %s | opt -aa-eval -print-all-alias-modref-info \
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; RUN: |& grep {MayAlias: double\\* \[%\]p.0.i.0, double\\* \[%\]p3\$}
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; PR4267
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; %p3 is equal to %p.0.i.0 on the second iteration of the loop,
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; so MayAlias is needed.
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define void @foo([3 x [3 x double]]* noalias %p) {
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entry:
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%p3 = getelementptr [3 x [3 x double]]* %p, i64 0, i64 0, i64 3
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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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%p.0.i.0 = getelementptr [3 x [3 x double]]* %p, i64 0, i64 %i, i64 0
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volatile store double 0.0, double* %p3
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volatile store double 0.1, double* %p.0.i.0
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%i.next = add i64 %i, 1
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%cmp = icmp slt i64 %i.next, 3
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br i1 %cmp, label %loop, label %exit
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exit:
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ret void
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}
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