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1; RUN: llc --combiner-alias-analysis=false < %s | FileCheck %s
2; RUN: llc --combiner-alias-analysis=true  < %s | FileCheck %s
3
4; This test checks that we do not merge stores together which have
5; dependencies through their non-chain operands (e.g. one store is the
6; chain ancestor of a load whose value is used in as the data for the
7; other store). Merging in such cases creates a loop in the DAG.
8
9target datalayout = "e-m:e-i64:64-i128:128-n32:64-S128"
10target triple = "aarch64--linux-android"
11
12%"class.std::__1::complex.0.20.56.60.64.72.76.88.92.112.140.248" = type { float, float }
13
14; Function Attrs: noinline norecurse nounwind ssp uwtable
15define void @fn(<2 x i64>* %argA, <2 x i64>* %argB, i64* %a) #0 align 2 {
16  %_p_vec_full = load <2 x i64>, <2 x i64>* %argA, align 4, !alias.scope !1, !noalias !3
17  %x = extractelement <2 x i64> %_p_vec_full, i32 1
18  store i64 %x, i64* %a, align 8, !alias.scope !4, !noalias !9
19  %_p_vec_full155 = load <2 x i64>, <2 x i64>* %argB, align 4, !alias.scope !1, !noalias !3
20  %y = extractelement <2 x i64> %_p_vec_full155, i32 0
21  %scevgep41 = getelementptr i64, i64* %a, i64 -1
22  store i64 %y, i64* %scevgep41, align 8, !alias.scope !4, !noalias !9
23  ret void
24}
25
26; CHECK: ret
27
28attributes #0 = { noinline norecurse nounwind ssp uwtable "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "polly-optimized" "stack-protector-buffer-size"="8" "target-features"="+crc,+crypto,+neon" "unsafe-fp-math"="false" "use-soft-float"="false" }
29
30!llvm.ident = !{!0}
31
32!0 = !{!"Snapdragon LLVM ARM Compiler 3.8.0 (based on LLVM 3.8.0)"}
33!1 = distinct !{!1, !2, !"polly.alias.scope.rhs"}
34!2 = distinct !{!2, !"polly.alias.scope.domain"}
35!3 = !{!4, !5, !6, !7, !8}
36!4 = distinct !{!4, !2, !"polly.alias.scope.blockB"}
37!5 = distinct !{!5, !2, !"polly.alias.scope.add28.lcssa.reg2mem"}
38!6 = distinct !{!6, !2, !"polly.alias.scope.count.0.lcssa.reg2mem"}
39!7 = distinct !{!7, !2, !"polly.alias.scope.mul"}
40!8 = distinct !{!8, !2, !"polly.alias.scope.add28.us.lcssa.reg2mem"}
41!9 = !{!1, !5, !6, !7, !8}
42