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ae5418b4ef
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Ewan Crawford ae5418b4ef [Cloning] Move distinct GlobalVariable debug info metadata in CloneModule 
Duplicating the distinct Subprogram and CU metadata nodes seems like the incorrect thing to do in CloneModule for GlobalVariable debug info. As it results in the scope of the GlobalVariable DI no longer being consistent with the rest of the module, and the new CU is absent from llvm.dbg.cu.

Fixed by adding RF_MoveDistinctMDs to MapMetadata flags for GlobalVariables.

Current unit test IR after clone:
```
@gv = global i32 1, comdat($comdat), !dbg !0, !type !5

define private void @f() comdat($comdat) personality void ()* @persfn !dbg !14 {

!llvm.dbg.cu = !{!10}

!0 = !DIGlobalVariableExpression(var: !1)
!1 = distinct !DIGlobalVariable(name: "gv", linkageName: "gv", scope: !2, file: !3, line: 1, type: !9, isLocal: false, isDefinition: true)
!2 = distinct !DISubprogram(name: "f", linkageName: "f", scope: null, file: !3, line: 4, type: !4, isLocal: true, isDefinition: true, scopeLine: 3, isOptimized: false, unit: !6, variables: !5)
!3 = !DIFile(filename: "filename.c", directory: "/file/dir/")
!4 = !DISubroutineType(types: !5)
!5 = !{}
!6 = distinct !DICompileUnit(language: DW_LANG_C99, file: !7, producer: "CloneModule", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !5, globals: !8)
!7 = !DIFile(filename: "filename.c", directory: "/file/dir")
!8 = !{!0}
!9 = !DIBasicType(tag: DW_TAG_unspecified_type, name: "decltype(nullptr)")
!10 = distinct !DICompileUnit(language: DW_LANG_C99, file: !7, producer: "CloneModule", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !5, globals: !11)
!11 = !{!12}
!12 = !DIGlobalVariableExpression(var: !13)
!13 = distinct !DIGlobalVariable(name: "gv", linkageName: "gv", scope: !14, file: !3, line: 1, type: !9, isLocal: false, isDefinition: true)
!14 = distinct !DISubprogram(name: "f", linkageName: "f", scope: null, file: !3, line: 4, type: !4, isLocal: true, isDefinition: true, scopeLine: 3, isOptimized: false, unit: !10, variables: !5)
```

Patched IR after clone:
```
@gv = global i32 1, comdat($comdat), !dbg !0, !type !5

define private void @f() comdat($comdat) personality void ()* @persfn !dbg !2 {

!llvm.dbg.cu = !{!6}

!0 = !DIGlobalVariableExpression(var: !1)
!1 = distinct !DIGlobalVariable(name: "gv", linkageName: "gv", scope: !2, file: !3, line: 1, type: !9, isLocal: false, isDefinition: true)
!2 = distinct !DISubprogram(name: "f", linkageName: "f", scope: null, file: !3, line: 4, type: !4, isLocal: true, isDefinition: true, scopeLine: 3, isOptimized: false, unit: !6, variables: !5)
!3 = !DIFile(filename: "filename.c", directory: "/file/dir/")
!4 = !DISubroutineType(types: !5)
!5 = !{}
!6 = distinct !DICompileUnit(language: DW_LANG_C99, file: !7, producer: "CloneModule", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !5, globals: !8)
!7 = !DIFile(filename: "filename.c", directory: "/file/dir")
!8 = !{!0}
!9 = !DIBasicType(tag: DW_TAG_unspecified_type, name: "decltype(nullptr)")
```

Reviewers: aprantl, probinson, dblaikie, echristo, loladiro
Reviewed By: aprantl
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D36082

llvm-svn: 309928
2017-08-03 09:23:03 +00:00
bindings Update the Go bindings for r309426 (remove offset from llvm.dbg.value) 2017-07-28 22:44:44 +00:00
cmake [OCaml] Pass -D/-UNDEBUG through to ocamlc 2017-07-29 08:10:24 +00:00
docs [llvm-cov] Respect the value of the -show-instantiations option 2017-08-02 23:35:24 +00:00
examples Defeat another -Wunused-but-set-variable warning 2017-07-19 15:06:31 +00:00
include [SCEV] Re-enable "Cache results of computeExitLimit" 2017-08-03 08:41:30 +00:00
lib [Cloning] Move distinct GlobalVariable debug info metadata in CloneModule 2017-08-03 09:23:03 +00:00
projects Add temporary workaround to allow in-tree libc++ builds on Windows 2017-05-11 01:44:30 +00:00
resources
runtimes [CMake] Remove redundant logic in runtimes/CMakeList.txt 2017-07-24 17:26:28 +00:00
test [ARM] GlobalISel: Select simple G_GLOBAL_VALUE instructions 2017-08-03 09:14:59 +00:00
tools Delete Default and JITDefault code models 2017-08-03 02:16:21 +00:00
unittests [Cloning] Move distinct GlobalVariable debug info metadata in CloneModule 2017-08-03 09:23:03 +00:00
utils Revert "[lit] Avoid copying llvm/utils/lit/tests/Inputs with lit site configs" 2017-08-02 17:16:25 +00:00
.arcconfig project_id is from another era in phabricator land and does not provide any value. 2016-09-27 15:47:29 +00:00
.clang-format
.clang-tidy
.gitignore gitignore: Ignore .vs folder (VS2017 config files) 2017-04-08 00:16:58 +00:00
CMakeLists.txt Revert "[lit] Avoid copying llvm/utils/lit/tests/Inputs with lit site configs" 2017-08-02 17:16:25 +00:00
CODE_OWNERS.TXT Remove the BBVectorize pass. 2017-06-30 07:09:08 +00:00
configure
CREDITS.TXT Another test commit 2017-07-01 03:24:06 +00:00
LICENSE.TXT Bump year to 2017 in LICENSE.txt 2017-01-12 18:02:42 +00:00
llvm.spec.in
LLVMBuild.txt
README.txt Test commit. Added a blank line. 2017-03-06 20:45:33 +00:00
RELEASE_TESTERS.TXT [RelTest] Diana is doing both releases now 2017-07-14 08:33:52 +00:00

README.txt 

Low Level Virtual Machine (LLVM)
================================

This directory and its subdirectories contain source code for LLVM,
a toolkit for the construction of highly optimized compilers,
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LLVM is open source software. You may freely distribute it under the terms of
the license agreement found in LICENSE.txt.

Please see the documentation provided in docs/ for further
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started with LLVM and docs/README.txt for an overview of LLVM's
documentation setup.

If you are writing a package for LLVM, see docs/Packaging.rst for our
suggestions.