derek.holloway
7502bf64a4
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36 lines
1.2 KiB
LLVM
36 lines
1.2 KiB
LLVM
; RUN: llc -verify-machineinstrs -mcpu=pwr7 -O2 -relocation-model=pic < %s | FileCheck %s
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target datalayout = "e-m:e-i64:64-n32:64"
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target triple = "powerpc64le-unknown-linux-gnu"
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; Test back-to-back stores of TLS variables to ensure call sequences no
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; longer overlap.
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@__once_callable = external thread_local global ptr
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@__once_call = external thread_local global ptr
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define i64 @call_once(i64 %flag, ptr %ptr) {
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entry:
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%var = alloca ptr, align 8
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store ptr %ptr, ptr %var, align 8
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store ptr %var, ptr @__once_callable, align 8
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store ptr @__once_call_impl, ptr @__once_call, align 8
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ret i64 %flag
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}
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; CHECK-LABEL: call_once:
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; CHECK: addi 3, {{[0-9]+}}, __once_callable@got@tlsgd@l
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; CHECK: bl __tls_get_addr(__once_callable@tlsgd)
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; CHECK-NEXT: nop
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; FIXME: We could check here for 'std {{[0-9]+}}, 0(3)', but that no longer
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; works because, with new scheduling freedom, we create a copy of R3 based on the
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; initial scheduling, but don't coalesce it again after we move the instructions
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; so that the copy is no longer necessary.
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; CHECK: addi 3, {{[0-9]+}}, __once_call@got@tlsgd@l
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; CHECK: bl __tls_get_addr(__once_call@tlsgd)
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; CHECK-NEXT: nop
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; CHECK: std {{[0-9]+}}, 0(3)
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; CHECK: mr 3, 30
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declare void @__once_call_impl()
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