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Imported Upstream version 6.0.0.172

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Former-commit-id: f3cc9b82f3e5bd8f0fd3ebc098f789556b44e9cd
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Xamarin Public Jenkins (auto-signing)
2019-04-12 14:10:50 +00:00
parent 8016999e4d
commit 64ac736ec5
32155 changed files with 3981439 additions and 75368 deletions
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61
external/llvm/test/Transforms/NewGVN/volatile-nonvolatile.ll vendored Normal file
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; RUN: opt -tbaa -newgvn -S < %s | FileCheck %s
%struct.t = type { i32* }
; The loaded address and the location of the address itself are not aliased,
; so the second reload is not necessary. Check that it can be eliminated.
; CHECK-LABEL: test1
; CHECK: load
; CHECK-NOT: load
define void @test1(%struct.t* nocapture readonly %p, i32 %v) #0 {
entry:
%m = getelementptr inbounds %struct.t, %struct.t* %p, i32 0, i32 0
%0 = load i32*, i32** %m, align 4, !tbaa !1
store volatile i32 %v, i32* %0, align 4, !tbaa !6
%1 = load i32*, i32** %m, align 4, !tbaa !1
store volatile i32 %v, i32* %1, align 4, !tbaa !6
ret void
}
; The store via the loaded address may overwrite the address itself.
; Make sure that both loads remain.
; CHECK-LABEL: test2
; CHECK: load
; CHECK: store
; CHECK: load
define void @test2(%struct.t* nocapture readonly %p, i32 %v) #0 {
entry:
%m = getelementptr inbounds %struct.t, %struct.t* %p, i32 0, i32 0
%0 = load i32*, i32** %m, align 4, !tbaa !1
store volatile i32 %v, i32* %0, align 4, !tbaa !1
%1 = load i32*, i32** %m, align 4, !tbaa !1
store volatile i32 %v, i32* %1, align 4, !tbaa !1
ret void
}
; The loads are ordered and non-monotonic. Although they are not aliased to
; the stores, make sure both are preserved.
; CHECK-LABEL: test3
; CHECK: load
; CHECK: store
; CHECK: load
define void @test3(%struct.t* nocapture readonly %p, i32 %v) #0 {
entry:
%m = getelementptr inbounds %struct.t, %struct.t* %p, i32 0, i32 0
%0 = load atomic i32*, i32** %m acquire, align 4, !tbaa !1
store volatile i32 %v, i32* %0, align 4, !tbaa !6
%1 = load atomic i32*, i32** %m acquire, align 4, !tbaa !1
store volatile i32 %v, i32* %1, align 4, !tbaa !6
ret void
}
attributes #0 = { norecurse nounwind }
!1 = !{!2, !3, i64 0}
!2 = !{!"", !3, i64 0}
!3 = !{!"any pointer", !4, i64 0}
!4 = !{!"omnipotent char", !5, i64 0}
!5 = !{!"Simple C/C++ TBAA"}
!6 = !{!7, !7, i64 0}
!7 = !{!"int", !4, i64 0}