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17e97fbf13
The 'common' section TLS is not implemented. Current C/C++ TLS variables are not placed in common section. DWARF debug info to get the address of TLS variables is not generated yet. clang and driver changes in http://reviews.llvm.org/D10524 Added -femulated-tls flag to select the emulated TLS model, which will be used for old targets like Android that do not support ELF TLS models. Added TargetLowering::LowerToTLSEmulatedModel as a target-independent function to convert a SDNode of TLS variable address to a function call to __emutls_get_address. Added into lib/Target/*/*ISelLowering.cpp to call LowerToTLSEmulatedModel for TLSModel::Emulated. Although all targets supporting ELF TLS models are enhanced, emulated TLS model has been tested only for Android ELF targets. Modified AsmPrinter.cpp to print the emutls_v.* and emutls_t.* variables for emulated TLS variables. Modified DwarfCompileUnit.cpp to skip some DIE for emulated TLS variabls. TODO: Add proper DIE for emulated TLS variables. Added new unit tests with emulated TLS. Differential Revision: http://reviews.llvm.org/D10522 llvm-svn: 243438
35 lines
984 B
LLVM
35 lines
984 B
LLVM
; RUN: llc < %s -march=arm -mtriple=arm-linux-gnueabi | \
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; RUN: grep "tbss"
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; RUN: llc < %s -march=arm -mtriple=arm-linux-gnueabi | \
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; RUN: FileCheck %s -check-prefix=CHECK -check-prefix=NOEMU
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; RUN: llc < %s -emulated-tls -march=arm -mtriple=arm-linux-gnueabi | \
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; RUN: FileCheck %s -check-prefix=CHECK -check-prefix=EMU
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%struct.anon = type { i32, i32 }
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@teste = internal thread_local global %struct.anon zeroinitializer ; <%struct.anon*> [#uses=1]
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define i32 @main() {
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entry:
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%tmp2 = load i32, i32* getelementptr (%struct.anon, %struct.anon* @teste, i32 0, i32 0), align 8 ; <i32> [#uses=1]
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ret i32 %tmp2
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}
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; CHECK-LABEL: main:
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; NOEMU-NOT: __emutls_get_address
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; NOEMU: .section .tbss
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; NOEMU-LABEL: teste:
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; NOEMU-NEXT: .zero 8
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; CHECK-NOT: __emutls_t.teste
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; EMU: .align 2
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; EMU-LABEL: __emutls_v.teste:
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; EMU-NEXT: .long 8
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; EMU-NEXT: .long 4
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; EMU-NEXT: .long 0
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; EMU-NEXT: .long 0
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; CHECK-NOT: teste:
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; CHECK-NOT: __emutls_t.teste
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