maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity
llvm-project/llvm/test/CodeGen/X86/emutls-pic.ll

169 lines
3.9 KiB
LLVM
Raw Normal View History

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 llvm-svn: 243438
2015-07-29 00:24:05 +08:00
; RUN: llc < %s -emulated-tls -march=x86 -mtriple=i386-linux-gnu -relocation-model=pic | FileCheck -check-prefix=X32 %s
; RUN: llc < %s -emulated-tls -march=x86-64 -mtriple=x86_64-linux-gnu -relocation-model=pic | FileCheck -check-prefix=X64 %s
; RUN: llc < %s -emulated-tls -march=x86 -mtriple=i386-linux-android -relocation-model=pic | FileCheck -check-prefix=X32 %s
; RUN: llc < %s -emulated-tls -march=x86-64 -mtriple=x86_64-linux-android -relocation-model=pic | FileCheck -check-prefix=X64 %s
; Use my_emutls_get_address like __emutls_get_address.
@my_emutls_v_xyz = external global i8*, align 4
declare i8* @my_emutls_get_address(i8*)
define i32 @my_get_xyz() {
; X32-LABEL: my_get_xyz:
; X32: movl my_emutls_v_xyz@GOT(%ebx), %eax
; X32-NEXT: movl %eax, (%esp)
; X32-NEXT: calll my_emutls_get_address@PLT
; X64-LABEL: my_get_xyz:
; X64: movq my_emutls_v_xyz@GOTPCREL(%rip), %rdi
; X64-NEXT: callq my_emutls_get_address@PLT
; X64-NEXT: movl (%rax), %eax
entry:
%call = call i8* @my_emutls_get_address(i8* bitcast (i8** @my_emutls_v_xyz to i8*))
%0 = bitcast i8* %call to i32*
%1 = load i32, i32* %0, align 4
ret i32 %1
}
@i = thread_local global i32 15
@j = internal thread_local global i32 42
@k = internal thread_local global i32 0, align 8
define i32 @f1() {
entry:
%tmp1 = load i32, i32* @i
ret i32 %tmp1
}
; X32-LABEL: f1:
; X32: movl __emutls_v.i@GOT(%ebx), %eax
; X32-NEXT: movl %eax, (%esp)
; X32-NEXT: calll __emutls_get_address@PLT
; X64-LABEL: f1:
; X64: movq __emutls_v.i@GOTPCREL(%rip), %rdi
; X64-NEXT: callq __emutls_get_address@PLT
; X64-NEXT: movl (%rax), %eax
@i2 = external thread_local global i32
define i32* @f2() {
entry:
ret i32* @i
}
; X32-LABEL: f2:
; X64-LABEL: f2:
define i32 @f3() {
entry:
%tmp1 = load i32, i32* @i ; <i32> [#uses=1]
ret i32 %tmp1
}
; X32-LABEL: f3:
; X64-LABEL: f3:
define i32* @f4() nounwind {
entry:
ret i32* @i
}
; X32-LABEL: f4:
; X64-LABEL: f4:
define i32 @f5() nounwind {
entry:
%0 = load i32, i32* @j, align 4
%1 = load i32, i32* @k, align 4
%add = add nsw i32 %0, %1
ret i32 %add
}
; X32-LABEL: f5:
; X32: movl __emutls_v.j@GOT(%ebx), %eax
; X32-NEXT: movl %eax, (%esp)
; X32-NEXT: calll __emutls_get_address@PLT
; X32-NEXT: movl (%eax), %esi
; X32-NEXT: movl __emutls_v.k@GOT(%ebx), %eax
; X32-NEXT: movl %eax, (%esp)
; X32-NEXT: calll __emutls_get_address@PLT
; X32-NEXT: addl (%eax), %esi
; X32-NEXT: movl %esi, %eax
; X64-LABEL: f5:
; X64: movq __emutls_v.j@GOTPCREL(%rip), %rdi
; X64-NEXT: callq __emutls_get_address@PLT
; X64-NEXT: movl (%rax), %ebx
; X64-NEXT: movq __emutls_v.k@GOTPCREL(%rip), %rdi
; X64-NEXT: callq __emutls_get_address@PLT
; X64-NEXT: addl (%rax), %ebx
; X64-NEXT: movl %ebx, %eax
;;;;; 32-bit targets
Stop producing .data.rel sections. If a section is rw, it is irrelevant if the dynamic linker will write to it or not. It looks like llvm implemented this because gcc was doing it. It looks like gcc implemented this in the hope that it would put all the relocated items close together and speed up the dynamic linker. There are two problem with this: * It doesn't work. Both bfd and gold will map .data.rel to .data and concatenate the input sections in the order they are seen. * If we want a feature like that, it can be implemented directly in the linker since it knowns where the dynamic relocations are. llvm-svn: 253436
2015-11-18 14:02:15 +08:00
; X32: .data
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 llvm-svn: 243438
2015-07-29 00:24:05 +08:00
; X32-LABEL: __emutls_v.i:
; X32-NEXT: .long 4
; X32-NEXT: .long 4
; X32-NEXT: .long 0
; X32-NEXT: .long __emutls_t.i
; X32: .section .rodata,
; X32-LABEL: __emutls_t.i:
; X32-NEXT: .long 15
Stop producing .data.rel sections. If a section is rw, it is irrelevant if the dynamic linker will write to it or not. It looks like llvm implemented this because gcc was doing it. It looks like gcc implemented this in the hope that it would put all the relocated items close together and speed up the dynamic linker. There are two problem with this: * It doesn't work. Both bfd and gold will map .data.rel to .data and concatenate the input sections in the order they are seen. * If we want a feature like that, it can be implemented directly in the linker since it knowns where the dynamic relocations are. llvm-svn: 253436
2015-11-18 14:02:15 +08:00
; X32: .data
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 llvm-svn: 243438
2015-07-29 00:24:05 +08:00
; X32-LABEL: __emutls_v.j:
; X32-NEXT: .long 4
; X32-NEXT: .long 4
; X32-NEXT: .long 0
; X32-NEXT: .long __emutls_t.j
; X32: .section .rodata,
; X32-LABEL: __emutls_t.j:
; X32-NEXT: .long 42
; X32: .data
; X32-LABEL: __emutls_v.k:
; X32-NEXT: .long 4
; X32-NEXT: .long 8
; X32-NEXT: .long 0
; X32-NEXT: .long 0
; X32-NOT: __emutls_t.k:
;;;;; 64-bit targets
Stop producing .data.rel sections. If a section is rw, it is irrelevant if the dynamic linker will write to it or not. It looks like llvm implemented this because gcc was doing it. It looks like gcc implemented this in the hope that it would put all the relocated items close together and speed up the dynamic linker. There are two problem with this: * It doesn't work. Both bfd and gold will map .data.rel to .data and concatenate the input sections in the order they are seen. * If we want a feature like that, it can be implemented directly in the linker since it knowns where the dynamic relocations are. llvm-svn: 253436
2015-11-18 14:02:15 +08:00
; X64: .data
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 llvm-svn: 243438
2015-07-29 00:24:05 +08:00
; X64-LABEL: __emutls_v.i:
; X64-NEXT: .quad 4
; X64-NEXT: .quad 4
; X64-NEXT: .quad 0
; X64-NEXT: .quad __emutls_t.i
; X64: .section .rodata,
; X64-LABEL: __emutls_t.i:
; X64-NEXT: .long 15
Stop producing .data.rel sections. If a section is rw, it is irrelevant if the dynamic linker will write to it or not. It looks like llvm implemented this because gcc was doing it. It looks like gcc implemented this in the hope that it would put all the relocated items close together and speed up the dynamic linker. There are two problem with this: * It doesn't work. Both bfd and gold will map .data.rel to .data and concatenate the input sections in the order they are seen. * If we want a feature like that, it can be implemented directly in the linker since it knowns where the dynamic relocations are. llvm-svn: 253436
2015-11-18 14:02:15 +08:00
; X64: .data
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 llvm-svn: 243438
2015-07-29 00:24:05 +08:00
; X64-LABEL: __emutls_v.j:
; X64-NEXT: .quad 4
; X64-NEXT: .quad 4
; X64-NEXT: .quad 0
; X64-NEXT: .quad __emutls_t.j
; X64: .section .rodata,
; X64-LABEL: __emutls_t.j:
; X64-NEXT: .long 42
; X64: .data
; X64-LABEL: __emutls_v.k:
; X64-NEXT: .quad 4
; X64-NEXT: .quad 8
; X64-NEXT: .quad 0
; X64-NEXT: .quad 0
; X64-NOT: __emutls_t.k: