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TheRock/compiler/amd-llvm/llvm/test/Analysis/BasicAA/fallback-mayalias.ll
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LLVM

; RUN: opt -aa-pipeline=basic-aa -passes=aa-eval -print-all-alias-modref-info -disable-output < %s 2>&1 | FileCheck %s
; Check that BasicAA falls back to MayAlias (instead of PartialAlias) when none
; of its little tricks are applicable.
; CHECK: NoAlias: float* %arrayidxA, float* %arrayidxB
define void @fallback_mayalias(ptr noalias nocapture %C, i64 %i, i64 %j) local_unnamed_addr {
entry:
%cmp = icmp ne i64 %i, %j
call void @llvm.assume(i1 %cmp)
%arrayidxA = getelementptr inbounds float, ptr %C, i64 %i
store float undef, ptr %arrayidxA, align 4
%arrayidxB = getelementptr inbounds float, ptr %C, i64 %j
store float undef, ptr %arrayidxB, align 4
ret void
}
declare void @llvm.assume(i1)