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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
90 lines
2.2 KiB
LLVM
90 lines
2.2 KiB
LLVM
; RUN: llc < %s -emulated-tls -march=x86 -mtriple=x86_64-linux-android -relocation-model=pic | FileCheck %s
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; RUN: llc < %s -emulated-tls -march=x86-64 -mtriple=x86_64-linux-android -relocation-model=pic | FileCheck -check-prefix=X64 %s
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; Make sure that TLS symboles are emitted in expected order.
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@external_x = external thread_local global i32
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@external_y = thread_local global i32 7
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@internal_y = internal thread_local global i32 9
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define i32* @get_external_x() {
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entry:
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ret i32* @external_x
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}
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define i32* @get_external_y() {
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entry:
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ret i32* @external_y
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}
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define i32* @get_internal_y() {
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entry:
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ret i32* @internal_y
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}
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; 32-bit mode
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; CHECK-LABEL: get_external_x:
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; CHECK: __emutls_v.external_x
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; CHECK: __emutls_get_address
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; CHECK-LABEL: get_external_y:
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; CHECK: __emutls_v.external_y
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; CHECK: __emutls_get_address
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; CHECK-LABEL: get_internal_y:
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; CHECK: __emutls_v.internal_y
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; CHECK: __emutls_get_address
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; CHECK-NOT: __emutls_v.external_x:
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; CHECK: .align 4
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; CHECK-LABEL: __emutls_v.external_y:
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; CHECK-NEXT: .long 4
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; CHECK-NEXT: .long 4
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; CHECK-NEXT: .long 0
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; CHECK-NEXT: .long __emutls_t.external_y
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; CHECK-LABEL: __emutls_t.external_y:
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; CHECK-NEXT: .long 7
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; CHECK: .align 4
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; CHECK-LABEL: __emutls_v.internal_y:
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; CHECK-NEXT: .long 4
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; CHECK-NEXT: .long 4
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; CHECK-NEXT: .long 0
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; CHECK-NEXT: .long __emutls_t.internal_y
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; CHECK-LABEL: __emutls_t.internal_y:
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; CHECK-NEXT: .long 9
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; 64-bit mode
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; X64-LABEL: get_external_x:
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; X64: __emutls_v.external_x
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; X64: __emutls_get_address
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; X64-LABEL: get_external_y:
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; X64: __emutls_v.external_y
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; X64: __emutls_get_address
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; X64-LABEL: get_internal_y:
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; X64: __emutls_v.internal_y
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; X64: __emutls_get_address
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; X64-NOT: __emutls_v.external_x:
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; X64: .align 8
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; X64-LABEL: __emutls_v.external_y:
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; X64-NEXT: .quad 4
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; X64-NEXT: .quad 4
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; X64-NEXT: .quad 0
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; X64-NEXT: .quad __emutls_t.external_y
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; X64-LABEL: __emutls_t.external_y:
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; X64-NEXT: .long 7
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; X64: .align 8
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; X64-LABEL: __emutls_v.internal_y:
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; X64-NEXT: .quad 4
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; X64-NEXT: .quad 4
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; X64-NEXT: .quad 0
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; X64-NEXT: .quad __emutls_t.internal_y
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; X64-LABEL: __emutls_t.internal_y:
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; X64-NEXT: .long 9
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