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; RUN: llc -verify-machineinstrs -mcpu=pwr7 -O2 -relocation-model=pic < %s | FileCheck %s
target datalayout = "e-m:e-i64:64-n32:64"
target triple = "powerpc64le-unknown-linux-gnu"
; Test back-to-back stores of TLS variables to ensure call sequences no
; longer overlap.
@__once_callable = external thread_local global i8**
@__once_call = external thread_local global void ()*
define i64 @call_once(i64 %flag, i8* %ptr) {
entry:
%var = alloca i8*, align 8
store i8* %ptr, i8** %var, align 8
store i8** %var, i8*** @__once_callable, align 8
store void ()* @__once_call_impl, void ()** @__once_call, align 8
ret i64 %flag
}
; CHECK-LABEL: call_once:
; CHECK: addi 3, {{[0-9]+}}, __once_callable@got@tlsgd@l
; CHECK: bl __tls_get_addr(__once_callable@tlsgd)
; CHECK-NEXT: nop
; FIXME: We could check here for 'std {{[0-9]+}}, 0(3)', but that no longer
; works because, with new scheduling freedom, we create a copy of R3 based on the
; initial scheduling, but don't coalesce it again after we move the instructions
; so that the copy is no longer necessary.
; CHECK: addi 3, {{[0-9]+}}, __once_call@got@tlsgd@l
; CHECK: bl __tls_get_addr(__once_call@tlsgd)
; CHECK-NEXT: nop
; FIXME: We don't really need the copy here either, we could move the store up.
; CHECK: mr [[REG1:[0-9]+]], 3
; CHECK: std {{[0-9]+}}, 0([[REG1]])
declare void @__once_call_impl()
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