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| author | Chih-Hung Hsieh <chh@google.com> | 2015-07-28 16:24:05 +0000 |
|---|---|---|
| committer | Chih-Hung Hsieh <chh@google.com> | 2015-07-28 16:24:05 +0000 |
| commit | dc73dc09f135cb1d36fd18f1918395ddf68cec63 (patch) | |
| tree | e6abca46a25d7295110dd6ea0590fe8c49325210 /test/CodeGen/ARM/emutls1.ll | |
| parent | 751664fd1bde84a552bf91d7487ebb85ce648139 (diff) | |
Implement target independent TLS compatible with glibc's emutls.c.
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
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243438 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/ARM/emutls1.ll')
| -rw-r--r-- | test/CodeGen/ARM/emutls1.ll | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/test/CodeGen/ARM/emutls1.ll b/test/CodeGen/ARM/emutls1.ll new file mode 100644 index 00000000000..d4ba7eced66 --- /dev/null +++ b/test/CodeGen/ARM/emutls1.ll @@ -0,0 +1,31 @@ +; RUN: llc < %s -emulated-tls -march=arm -mtriple=arm-linux-androideabi \ +; RUN: | FileCheck %s +; RUN: llc < %s -emulated-tls -march=arm -mtriple=arm-linux-androideabi \ +; RUN: -relocation-model=pic | FileCheck %s --check-prefix=PIC + +; Compared with tls1.ll, emulated mode should not use __aeabi_read_tp or __tls_get_addr. + +; CHECK-NOT: _aeabi_read_tp +; CHECK-NOT: _tls_get_addr +; CHECK: __emutls_get_addr +; CHECK-NOT: __aeabi_read_tp +; CHECK-NOT: _tls_get_addr + +; PIC-NOT: _aeabi_read_tp +; PIC-NOT: _tls_get_addr +; PIC: __emutls_get_addr +; PIC-NOT: _aeabi_read_tp +; PIC-NOT: _tls_get_addr + +@i = thread_local global i32 15 ; <i32*> [#uses=2] + +define i32 @f() { +entry: + %tmp1 = load i32, i32* @i ; <i32> [#uses=1] + ret i32 %tmp1 +} + +define i32* @g() { +entry: + ret i32* @i +} |