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; RUN: llc -mcpu=cyclone -debug-only=machine-scheduler < %s 2>&1 | FileCheck %s
; REQUIRES: asserts
target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
target triple = "arm64-apple-ios7.0.0"
define void @caller2(i8* %a0, i8* %a1, i8* %a2, i8* %a3, i8* %a4, i8* %a5, i8* %a6, i8* %a7, i8* %a8, i8* %a9) {
entry:
tail call void @callee2(i8* %a1, i8* %a2, i8* %a3, i8* %a4, i8* %a5, i8* %a6, i8* %a7, i8* %a8, i8* %a9, i8* %a0)
ret void
}
declare void @callee2(i8*, i8*, i8*, i8*, i8*,
i8*, i8*, i8*, i8*, i8*)
; Make sure there is a dependence between the load and store to the same stack
; location during a tail call. Tail calls clobber the incoming argument area and
; therefore it is not safe to assume argument locations are invariant.
; PR23459 has a test case that we where miscompiling because of this at the
; time.
; CHECK: Frame Objects
; CHECK: fi#-4: {{.*}} fixed, at location [SP+8]
; CHECK: fi#-3: {{.*}} fixed, at location [SP]
; CHECK: fi#-2: {{.*}} fixed, at location [SP+8]
; CHECK: fi#-1: {{.*}} fixed, at location [SP]
; CHECK: [[VRA:%.*]]:gpr64 = LDRXui %fixed-stack.3
; CHECK: [[VRB:%.*]]:gpr64 = LDRXui %fixed-stack.2
; CHECK: STRXui %{{.*}}, %fixed-stack.0
; CHECK: STRXui [[VRB]]{{[^,]*}}, %fixed-stack.1
; Make sure that there is an dependence edge between fi#-2 and fi#-4.
; Without this edge the scheduler would be free to move the store accross the load.
; CHECK: SU({{.*}}): [[VRB]]:gpr64 = LDRXui %fixed-stack.2
; CHECK-NOT: SU
; CHECK: Successors:
; CHECK: SU([[DEPSTOREB:.*]]): Ord Latency=0
; CHECK: SU([[DEPSTOREA:.*]]): Ord Latency=0
; CHECK: SU([[DEPSTOREA]]): STRXui %{{.*}}, %fixed-stack.0
; CHECK: SU([[DEPSTOREB]]): STRXui %{{.*}}, %fixed-stack.1
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