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; RUN: opt -instcombine -S %s | FileCheck %s
; Make sure we collapse the fences in this case
; CHECK-LABEL: define void @tinkywinky
; CHECK-NEXT: fence seq_cst
; CHECK-NEXT: fence syncscope("singlethread") acquire
; CHECK-NEXT: ret void
; CHECK-NEXT: }
define void @tinkywinky() {
fence seq_cst
fence seq_cst
fence seq_cst
fence syncscope("singlethread") acquire
fence syncscope("singlethread") acquire
fence syncscope("singlethread") acquire
ret void
}
; CHECK-LABEL: define void @dipsy
; CHECK-NEXT: fence seq_cst
; CHECK-NEXT: fence syncscope("singlethread") seq_cst
; CHECK-NEXT: ret void
; CHECK-NEXT: }
define void @dipsy() {
fence seq_cst
fence syncscope("singlethread") seq_cst
ret void
}
; CHECK-LABEL: define void @patatino
; CHECK-NEXT: fence acquire
; CHECK-NEXT: fence seq_cst
; CHECK-NEXT: fence acquire
; CHECK-NEXT: fence seq_cst
; CHECK-NEXT: ret void
; CHECK-NEXT: }
define void @patatino() {
fence acquire
fence seq_cst
fence acquire
fence seq_cst
ret void
}
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