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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
156 lines
4.3 KiB
LLVM
156 lines
4.3 KiB
LLVM
; RUN: llc -march=arm -mtriple=arm-linux-gnueabi < %s \
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; RUN: | FileCheck -check-prefix=CHECK-NONPIC -check-prefix=COMMON %s
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; RUN: llc -march=arm -mtriple=arm-linux-gnueabi -relocation-model=pic < %s \
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; RUN: | FileCheck -check-prefix=CHECK-PIC -check-prefix=COMMON %s
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; RUN: llc -emulated-tls -march=arm -mtriple=arm-linux-gnueabi < %s \
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; RUN: | FileCheck -check-prefix=EMUNONPIC -check-prefix=EMU -check-prefix=COMMON %s
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; RUN: llc -emulated-tls -march=arm -mtriple=arm-linux-gnueabi -relocation-model=pic < %s \
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; RUN: | FileCheck -check-prefix=EMUPIC -check-prefix=EMU -check-prefix=COMMON %s
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@external_gd = external thread_local global i32
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@internal_gd = internal thread_local global i32 42
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@external_ld = external thread_local(localdynamic) global i32
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@internal_ld = internal thread_local(localdynamic) global i32 42
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@external_ie = external thread_local(initialexec) global i32
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@internal_ie = internal thread_local(initialexec) global i32 42
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@external_le = external thread_local(localexec) global i32
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@internal_le = internal thread_local(localexec) global i32 42
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; ----- no model specified -----
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define i32* @f1() {
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entry:
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ret i32* @external_gd
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; COMMON-LABEL: f1:
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; Non-PIC code can use initial-exec, PIC code has to use general dynamic.
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; CHECK-NONPIC: external_gd(GOTTPOFF)
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; CHECK-PIC: external_gd(TLSGD)
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; EMU: __emutls_get_address
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}
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define i32* @f2() {
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entry:
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ret i32* @internal_gd
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; COMMON-LABEL: f2:
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; Non-PIC code can use local exec, PIC code can use local dynamic,
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; but that is not implemented, so falls back to general dynamic.
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; CHECK-NONPIC: internal_gd(TPOFF)
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; CHECK-PIC: internal_gd(TLSGD)
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; EMU: __emutls_get_address
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}
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; ----- localdynamic specified -----
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define i32* @f3() {
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entry:
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ret i32* @external_ld
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; COMMON-LABEL: f3:
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; Non-PIC code can use initial exec, PIC should use local dynamic,
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; but that is not implemented, so falls back to general dynamic.
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; CHECK-NONPIC: external_ld(GOTTPOFF)
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; CHECK-PIC: external_ld(TLSGD)
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; EMU: __emutls_get_address
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}
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define i32* @f4() {
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entry:
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ret i32* @internal_ld
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; COMMON-LABEL: f4:
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; Non-PIC code can use local exec, PIC code can use local dynamic,
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; but that is not implemented, so it falls back to general dynamic.
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; CHECK-NONPIC: internal_ld(TPOFF)
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; CHECK-PIC: internal_ld(TLSGD)
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; EMU: __emutls_get_address
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}
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; ----- initialexec specified -----
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define i32* @f5() {
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entry:
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ret i32* @external_ie
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; COMMON-LABEL: f5:
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; Non-PIC and PIC code will use initial exec as specified.
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; CHECK-NONPIC: external_ie(GOTTPOFF)
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; CHECK-PIC: external_ie(GOTTPOFF)
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; EMU: __emutls_get_address
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}
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define i32* @f6() {
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entry:
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ret i32* @internal_ie
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; COMMON-LABEL: f6:
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; Non-PIC code can use local exec, PIC code use initial exec as specified.
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; CHECK-NONPIC: internal_ie(TPOFF)
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; CHECK-PIC: internal_ie(GOTTPOFF)
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; EMU: __emutls_get_address
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}
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; ----- localexec specified -----
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define i32* @f7() {
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entry:
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ret i32* @external_le
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; COMMON-LABEL: f7:
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; Non-PIC and PIC code will use local exec as specified.
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; CHECK-NONPIC: external_le(TPOFF)
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; CHECK-PIC: external_le(TPOFF)
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; EMU: __emutls_get_address
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}
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define i32* @f8() {
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entry:
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ret i32* @internal_le
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; COMMON-LABEL: f8:
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; Non-PIC and PIC code will use local exec as specified.
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; CHECK-NONPIC: internal_le(TPOFF)
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; CHECK-PIC: internal_le(TPOFF)
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; EMU: __emutls_get_address
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}
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; ----- emulated specified -----
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; External declaration has no initializer.
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; Internal definition has initializer.
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; EMU-NOT: __emutls_t.external_gd
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; EMU-NOT: __emutls_v.external_gd
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; EMU: .align 2
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; EMU-LABEL: __emutls_v.internal_gd:
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; EMU-NEXT: .long 4
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; EMU-NEXT: .long 4
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; EMU-NEXT: .long 0
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; EMU-NEXT: .long __emutls_t.internal_gd
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; EMU-LABEL: __emutls_t.internal_gd:
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; EMU-NEXT: .long 42
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; EMU-NOT: __emutls_t.external_gd
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; __emutls_t and __emutls_v are the same for PIC and non-PIC modes.
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; EMU-NOT: __emutls_t.external_gd
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; EMU-NOT: __emutls_v.external_gd
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; EMU: .align 2
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; EMU-LABEL: __emutls_v.internal_le:
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; EMU-NEXT: .long 4
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; EMU-NEXT: .long 4
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; EMU-NEXT: .long 0
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; EMU-NEXT: .long __emutls_t.internal_le
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; EMU-LABEL: __emutls_t.internal_le:
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; EMU-NEXT: .long 42
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; EMU-NOT: __emutls_t.external_le
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