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llvm-mirror/test/DebugInfo/X86/tls.ll
Shiva Chen a2029fa58e [DebugInfo] Add DILabel metadata and intrinsic llvm.dbg.label. 
In order to set breakpoints on labels and list source code around
labels, we need collect debug information for labels, i.e., label
name, the function label belong, line number in the file, and the
address label located. In order to keep these information in LLVM
IR and to allow backend to generate debug information correctly.
We create a new kind of metadata for labels, DILabel. The format
of DILabel is

!DILabel(scope: !1, name: "foo", file: !2, line: 3)

We hope to keep debug information as much as possible even the
code is optimized. So, we create a new kind of intrinsic for label
metadata to avoid the metadata is eliminated with basic block.
The intrinsic will keep existing if we keep it from optimized out.
The format of the intrinsic is

llvm.dbg.label(metadata !1)

It has only one argument, that is the DILabel metadata. The
intrinsic will follow the label immediately. Backend could get the
label metadata through the intrinsic's parameter.

We also create DIBuilder API for labels to be used by Frontend.
Frontend could use createLabel() to allocate DILabel objects, and use
insertLabel() to insert llvm.dbg.label intrinsic in LLVM IR.

Differential Revision: https://reviews.llvm.org/D45024

Patch by Hsiangkai Wang.

llvm-svn: 331841
2018-05-09 02:40:45 +00:00

134 lines
5.4 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-file=foo.dwo \
; 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, expr: !DIExpression())
!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, expr: !DIExpression())
!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, retainedNodes: !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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