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1; RUN: llc < %s | FileCheck %s
2
3; This test checks that we do not merge stores together which have
4; dependencies through their non-chain operands (e.g. one store is the
5; chain ancestor of a load whose value is used in as the data for the
6; other store). Merging in such cases creates a loop in the DAG.
7
8target datalayout = "e-m:e-i64:64-i128:128-n32:64-S128"
9target triple = "aarch64--linux-android"
10
11%"class.std::__1::complex.0.20.56.60.64.72.76.88.92.112.140.248" = type { float, float }
12
13; Function Attrs: noinline norecurse nounwind ssp uwtable
14define void @fn(<2 x i64>* %argA, <2 x i64>* %argB, i64* %a) #0 align 2 {
15  %_p_vec_full = load <2 x i64>, <2 x i64>* %argA, align 4, !alias.scope !1, !noalias !3
16  %x = extractelement <2 x i64> %_p_vec_full, i32 1
17  store i64 %x, i64* %a, align 8, !alias.scope !4, !noalias !9
18  %_p_vec_full155 = load <2 x i64>, <2 x i64>* %argB, align 4, !alias.scope !1, !noalias !3
19  %y = extractelement <2 x i64> %_p_vec_full155, i32 0
20  %scevgep41 = getelementptr i64, i64* %a, i64 -1
21  store i64 %y, i64* %scevgep41, align 8, !alias.scope !4, !noalias !9
22  ret void
23}
24
25; CHECK: ret
26
27attributes #0 = { noinline norecurse nounwind ssp uwtable "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="all" "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" }
28
29!llvm.ident = !{!0}
30
31!0 = !{!"Snapdragon LLVM ARM Compiler 3.8.0 (based on LLVM 3.8.0)"}
32!1 = distinct !{!1, !2, !"polly.alias.scope.rhs"}
33!2 = distinct !{!2, !"polly.alias.scope.domain"}
34!3 = !{!4, !5, !6, !7, !8}
35!4 = distinct !{!4, !2, !"polly.alias.scope.blockB"}
36!5 = distinct !{!5, !2, !"polly.alias.scope.add28.lcssa.reg2mem"}
37!6 = distinct !{!6, !2, !"polly.alias.scope.count.0.lcssa.reg2mem"}
38!7 = distinct !{!7, !2, !"polly.alias.scope.mul"}
39!8 = distinct !{!8, !2, !"polly.alias.scope.add28.us.lcssa.reg2mem"}
40!9 = !{!1, !5, !6, !7, !8}
41