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dc73dc09f1
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
35 lines
1.3 KiB
LLVM
35 lines
1.3 KiB
LLVM
; RUN: llc -O0 -filetype=asm -mtriple=armv7-linux-gnuehabi < %s \
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; RUN: | FileCheck %s --check-prefix=CHECK
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; RUN: llc -O0 -filetype=asm -mtriple=armv7-linux-gnuehabi -emulated-tls < %s \
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; RUN: | FileCheck %s --check-prefix=EMU
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; Generated with clang with source
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; __thread int x;
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@x = thread_local global i32 0, align 4
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!7, !8}
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!llvm.ident = !{!9}
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; 6 byte of data
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; CHECK: .byte 6 @ DW_AT_location
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; DW_OP_const4u
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; CHECK: .byte 12
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; The debug relocation of the address of the tls variable
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; CHECK: .long x(tlsldo)
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; TODO: Add expected output for -emulated-tls tests.
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; EMU-NOT: .long x(tlsldo)
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!0 = !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.5 ", isOptimized: false, emissionKind: 0, file: !1, enums: !2, retainedTypes: !2, subprograms: !2, globals: !3, imports: !2)
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!1 = !DIFile(filename: "tls.c", directory: "/tmp")
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!2 = !{}
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!3 = !{!4}
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!4 = !DIGlobalVariable(name: "x", line: 1, isLocal: false, isDefinition: true, scope: null, file: !5, type: !6, variable: i32* @x)
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!5 = !DIFile(filename: "tls.c", directory: "/tmp")
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!6 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!7 = !{i32 2, !"Dwarf Version", i32 4}
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!8 = !{i32 1, !"Debug Info Version", i32 3}
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!9 = !{!"clang version 3.5 "}
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