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https://github.com/c64scene-ar/llvm-6502.git
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9168f717c9
Unfortunately, even with the workaround of disabling the linker TLS optimizations in Clang restored (which has already been done), this still breaks self-hosting on my P7 machine (-O3 -DNDEBUG -mcpu=native). Bill is currently working on an alternate implementation to address the TLS issue in a way that also fully elides the linker bug (which, unfortunately, this approach did not fully), so I'm reverting this now. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@228460 91177308-0d34-0410-b5e6-96231b3b80d8
34 lines
1.0 KiB
LLVM
34 lines
1.0 KiB
LLVM
; RUN: llc -march=ppc64 -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 i8**
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@__once_call = external thread_local global void ()*
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define i64 @call_once(i64 %flag, i8* %ptr) {
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entry:
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%var = alloca i8*, align 8
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store i8* %ptr, i8** %var, align 8
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store i8** %var, i8*** @__once_callable, align 8
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store void ()* @__once_call_impl, void ()** @__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: addis 3, 2, __once_callable@got@tlsgd@ha
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; CHECK: addi 3, 3, __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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; CHECK: std {{[0-9]+}}, 0(3)
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; CHECK: addis 3, 2, __once_call@got@tlsgd@ha
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; CHECK: addi 3, 3, __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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declare void @__once_call_impl()
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