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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
32 lines
788 B
LLVM
32 lines
788 B
LLVM
; RUN: llc < %s -emulated-tls -march=arm -mtriple=arm-linux-androideabi \
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; RUN: | FileCheck %s
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; RUN: llc < %s -emulated-tls -march=arm -mtriple=arm-linux-androideabi \
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; RUN: -relocation-model=pic | FileCheck %s --check-prefix=PIC
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; Compared with tls1.ll, emulated mode should not use __aeabi_read_tp or __tls_get_addr.
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; CHECK-NOT: _aeabi_read_tp
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; CHECK-NOT: _tls_get_addr
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; CHECK: __emutls_get_addr
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; CHECK-NOT: __aeabi_read_tp
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; CHECK-NOT: _tls_get_addr
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; PIC-NOT: _aeabi_read_tp
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; PIC-NOT: _tls_get_addr
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; PIC: __emutls_get_addr
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; PIC-NOT: _aeabi_read_tp
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; PIC-NOT: _tls_get_addr
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@i = thread_local global i32 15 ; <i32*> [#uses=2]
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define i32 @f() {
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entry:
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%tmp1 = load i32, i32* @i ; <i32> [#uses=1]
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ret i32 %tmp1
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}
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define i32* @g() {
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entry:
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ret i32* @i
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}
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