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llvm-mirror/test/DebugInfo/X86/tls.ll
Rafael Espindola f20f8d830f Change how we handle section symbols on ELF. 
On ELF every section can have a corresponding section symbol. When in
an assembly file we have

.quad .text

the '.text' refers to that symbol.

The way we used to handle them is to leave .text an undefined symbol
until the very end when the object writer would map them to the
actual section symbol.

The problem with that is that anything before the end would see an
undefined symbol. This could result in bad diagnostics
(test/MC/AArch64/label-arithmetic-diags-elf.s), or incorrect results
when using the asm streamer (est/MC/Mips/expansion-jal-sym-pic.s).

Fixing this will also allow using the section symbol earlier for
setting sh_link of SHF_METADATA sections.

This patch includes a few hacks to avoid changing our behaviour when
handling conflicts between section symbols and other symbols. I
reported pr31850 to track that.

llvm-svn: 293936
2017-02-02 21:26:06 +00:00

134 lines
5.3 KiB
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; RUN: llc %s -o - -filetype=asm -O0 -mtriple=x86_64-unknown-linux-gnu \
; RUN: | FileCheck --check-prefix=NOEMU --check-prefix=SINGLE --check-prefix=SINGLE-64 --check-prefix=GNUOP %s
; RUN: llc %s -o - -filetype=asm -O0 -mtriple=i386-linux-gnu \
; RUN: | FileCheck --check-prefix=NOEMU --check-prefix=SINGLE --check-prefix=SINGLE-32 --check-prefix=GNUOP %s
; RUN: llc %s -o - -filetype=asm -O0 -mtriple=x86_64-unknown-linux-gnu -split-dwarf=Enable \
; RUN: | FileCheck --check-prefix=NOEMU --check-prefix=FISSION --check-prefix=GNUOP %s
; RUN: llc %s -o - -filetype=asm -O0 -mtriple=x86_64-scei-ps4 \
; RUN: | FileCheck --check-prefix=NOEMU --check-prefix=SINGLE --check-prefix=SINGLE-64 --check-prefix=STDOP %s
; RUN: llc %s -o - -filetype=asm -O0 -mtriple=x86_64-apple-darwin \
; RUN: | FileCheck --check-prefix=NOEMU --check-prefix=DARWIN --check-prefix=STDOP %s
; RUN: llc %s -o - -filetype=asm -O0 -mtriple=x86_64-unknown-freebsd \
; RUN: | FileCheck --check-prefix=NOEMU --check-prefix=SINGLE --check-prefix=SINGLE-64 --check-prefix=GNUOP %s
; RUN: llc %s -o - -filetype=asm -O0 -mtriple=x86_64-unknown-linux-gnu -emulated-tls \
; RUN: | FileCheck --check-prefix=SINGLE --check-prefix=EMUSINGLE-64 \
; RUN: --check-prefix=EMUGNUOP --check-prefix=EMU %s
; RUN: llc %s -o - -filetype=asm -O0 -mtriple=i386-linux-gnu -emulated-tls \
; RUN: | FileCheck --check-prefix=SINGLE --check-prefix=EMUSINGLE-32 \
; RUN: --check-prefix=EMUGNUOP --check-prefix=EMU %s
; TODO: Add expected output for -emulated-tls tests.
; FIXME: add relocation and DWARF expression support to llvm-dwarfdump & use
; that here instead of raw assembly printing
; FISSION: .section .debug_info.dwo,
; 3 bytes of data in this DW_FORM_block1 representation of the location of 'tls'
; FISSION: .byte 3{{ *}}# DW_AT_location
; DW_OP_GNU_const_index (0xfx == 252) to refer to the debug_addr table
; FISSION-NEXT: .byte 252
; an index of zero into the debug_addr table
; FISSION-NEXT: .byte 0
; SINGLE: .section .debug_info,
; DARWIN: .section {{.*}}debug_info,
; 10 bytes of data in this DW_FORM_block1 representation of the location of 'tls'
; SINGLE-64: .byte 10 # DW_AT_location
; DW_OP_const8u (0x0e == 14) of address
; SINGLE-64-NEXT: .byte 14
; SINGLE-64-NEXT: .quad tls@DTPOFF
; DARWIN: .byte 10 ## DW_AT_location
; DW_OP_const8u (0x0e == 14) of address
; DARWIN-NEXT: .byte 14
; DARWIN-NEXT: .quad _tls
; 6 bytes of data in 32-bit mode
; SINGLE-32: .byte 6 # DW_AT_location
; DW_OP_const4u (0x0e == 12) of address
; SINGLE-32-NEXT: .byte 12
; SINGLE-32-NEXT: .long tls@DTPOFF
; DW_OP_GNU_push_tls_address
; GNUOP-NEXT: .byte 224
; DW_OP_form_tls_address
; STDOP-NEXT: .byte 155
; FISSION: DW_TAG_variable
; FISSION: .byte 2 # DW_AT_location
; DW_OP_GNU_addr_index
; FISSION-NEXT: .byte 251
; FISSION-NEXT: .byte 1
; FISSION: DW_TAG_template_value_parameter
; FISSION: .byte 3 # DW_AT_location
; DW_OP_GNU_addr_index
; FISSION-NEXT: .byte 251
; FISSION-NEXT: .byte 1
; DW_OP_stack_value
; FISSION-NEXT: .byte 159
; check that the expected TLS address description is the first thing in the debug_addr section
; FISSION: .section .debug_addr
; FISSION-NEXT: .quad tls@DTPOFF
; FISSION-NEXT: .quad glbl
; FISSION-NOT: .quad glbl
; Generated from:
; __thread int tls;
; int glbl;
;
; template <int *I>
; int func() {
; return 0;
; }
;
; template int func<&glbl>(); // create a second reference to 'glbl'
source_filename = "test/DebugInfo/X86/tls.ll"
@tls = thread_local global i32 0, align 4, !dbg !0
@glbl = global i32 0, align 4, !dbg !4
; Function Attrs: nounwind uwtable
define weak_odr i32 @_Z4funcIXadL_Z4glblEEEiv() #0 !dbg !12 {
entry:
ret i32 0, !dbg !18
}
attributes #0 = { nounwind uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
!llvm.dbg.cu = !{!6}
!llvm.module.flags = !{!9, !10}
!llvm.ident = !{!11}
!0 = !DIGlobalVariableExpression(var: !1)
!1 = !DIGlobalVariable(name: "tls", scope: null, file: !2, line: 1, type: !3, isLocal: false, isDefinition: true)
!2 = !DIFile(filename: "tls.cpp", directory: "/tmp/dbginfo")
!3 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
!4 = !DIGlobalVariableExpression(var: !5)
!5 = !DIGlobalVariable(name: "glbl", scope: null, file: !2, line: 2, type: !3, isLocal: false, isDefinition: true)
!6 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !2, producer: "clang version 3.5 ", isOptimized: false, runtimeVersion: 0, splitDebugFilename: "-.dwo", emissionKind: FullDebug, enums: !7, retainedTypes: !7, globals: !8, imports: !7)
!7 = !{}
!8 = !{!0, !4}
!9 = !{i32 2, !"Dwarf Version", i32 4}
!10 = !{i32 1, !"Debug Info Version", i32 3}
!11 = !{!"clang version 3.5 "}
!12 = distinct !DISubprogram(name: "func<&glbl>", linkageName: "_Z4funcIXadL_Z4glblEEEiv", scope: !2, file: !2, line: 5, type: !13, isLocal: false, isDefinition: true, scopeLine: 5, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !6, templateParams: !15, variables: !7)
!13 = !DISubroutineType(types: !14)
!14 = !{!3}
!15 = !{!16}
!16 = !DITemplateValueParameter(name: "I", type: !17, value: i32* @glbl)
!17 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !3, size: 64, align: 64)
!18 = !DILocation(line: 6, scope: !12)
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