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* [WebAssembly] Allow multivalue signatures in object filesThomas Lively2019-10-181-2/+3
| | | | | | | | | | | | | | | | | Summary: Also changes the wasm YAML format to reflect the possibility of having multiple return types and to put the returns after the params for consistency with the binary encoding. Reviewers: aheejin, sbc100 Subscribers: dschuff, jgravelle-google, hiraditya, sunfish, arphaman, rupprecht, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D69156 llvm-svn: 375283
* [WebAssembly] Add DataCount section to object filesThomas Lively2019-04-121-1/+1
| | | | | | | | | | | | | | | | | | | Summary: This ensures that object files will continue to validate as WebAssembly modules in the presence of bulk memory operations. Engines that don't support bulk memory operations will not recognize the DataCount section and will report validation errors, but that's ok because object files aren't supposed to be run directly anyway. Reviewers: aheejin, dschuff, sbc100 Subscribers: jgravelle-google, hiraditya, sunfish, rupprecht, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D60623 llvm-svn: 358315
* [WebAssembly] Remove trailing whitespaces in tests (NFC)Heejin Ahn2019-03-061-3/+3
| | | | | | | | | | | | Reviewers: sbc100 Subscribers: dschuff, jgravelle-google, sunfish, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D58955 llvm-svn: 355472
* [WebAssembly] Remove uses of ThreadModelThomas Lively2019-02-281-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Summary: In the clang UI, replaces -mthread-model posix with -matomics as the source of truth on threading. In the backend, replaces -thread-model=posix with the atomics target feature, which is now collected on the WebAssemblyTargetMachine along with all other used features. These collected features will also be used to emit the target features section in the future. The default configuration for the backend is thread-model=posix and no atomics, which was previously an invalid configuration. This change makes the default valid because the thread model is ignored. A side effect of this change is that objects are never emitted with passive segments. It will instead be up to the linker to decide whether sections should be active or passive based on whether atomics are used in the final link. Reviewers: aheejin, sbc100, dschuff Subscribers: mehdi_amini, jgravelle-google, hiraditya, sunfish, steven_wu, dexonsmith, rupprecht, jfb, jdoerfert, cfe-commits, llvm-commits Tags: #clang, #llvm Differential Revision: https://reviews.llvm.org/D58742 llvm-svn: 355112
* [WebAssembly] Update MC for bulk memoryThomas Lively2019-02-191-1/+1
| | | | | | | | | | | | | | | | | | Summary: Rename MemoryIndex to InitFlags and implement logic for determining data segment layout in ObjectYAML and MC. Also adds a "passive" flag for the .section assembler directive although this cannot be assembled yet because the assembler does not support data sections. Reviewers: sbc100, aardappel, aheejin, dschuff Subscribers: jgravelle-google, hiraditya, sunfish, rupprecht, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D57938 llvm-svn: 354397
* [WebAssembly] Rename relocations from R_WEBASSEMBLY_ to R_WASM_Sam Clegg2019-02-041-1/+1
| | | | | | | | | | | | | | | | See https://github.com/WebAssembly/tool-conventions/pull/95. This is less typing and IMHO more readable, and it also fits with our naming around the binary format which tends to use the short name. e.g. include/llvm/BinaryFormat/Wasm.h tools/llvm-objdump/WasmDump.cpp etc.. Differential Revision: https://reviews.llvm.org/D57611 llvm-svn: 353062
* [WebAssembly] Add codegen support for the import_field attributeDan Gohman2019-02-011-2/+2
| | | | | | | | | This adds the LLVM side of https://reviews.llvm.org/D57602 -- the import_field attribute. See that patch for details. Differential Revision: https://reviews.llvm.org/D57603 llvm-svn: 352931
* [WebAssembly] Refactor WasmSignature and use it for MCSymbolWasmDerek Schuff2018-10-031-4/+21
| | | | | | | | | | | | MCContext does not destroy MCSymbols on shutdown. So, rather than putting SmallVectors (which may heap-allocate) inside MCSymbolWasm, use unowned pointer to a WasmSignature instead. The signatures are now owned by the AsmPrinter. Also uses WasmSignature instead of param and result vectors in TargetStreamer, and leaves some TODOs for further simplification. Differential Revision: https://reviews.llvm.org/D52580 llvm-svn: 343733
* [WebAsembly] Update default triple in test files to wasm32-unknown-unkown.Sam Clegg2018-05-101-1/+1
| | | | | | | | | | Summary: The final -wasm component has been the default for some time now. Subscribers: jfb, dschuff, jgravelle-google, eraman, aheejin, JDevlieghere, sunfish, llvm-commits Differential Revision: https://reviews.llvm.org/D46342 llvm-svn: 332007
* [WebAssembly] Reorder symbol table to match MC orderNicholas Wilson2018-02-281-1/+1
| | | | | | | | This removes a TODO introduced in rL325860 Differential Revision: https://reviews.llvm.org/D43685 llvm-svn: 326334
* [WebAssembly] Add mechanisms for specifying an explicit import module name.Dan Gohman2018-02-091-1/+8
| | | | | | | | | | | | | | | | | | | | This adds a wasm-import-module function attribute and a .import_module assembler directive, for specifying module import names for WebAssembly. Currently these may only be used for function symbols; global variables may be considered in the future. WebAssembly has a two-level namespace scheme for symbols, and it's normally the linker's job to assign the module name, which is the first-level name. The attributes here allow users to specify their own module names explicitly, which is useful for tools generating bindings to modules defined in other languages. This feature is not fully usable yet. It will evolve along with the ongoing symbol table and lld changes. Differential Revision: https://reviews.llvm.org/D42520 llvm-svn: 324778
* [WebAssembly] MC: Use inline triple in test bitcode filesSam Clegg2018-01-231-1/+4
| | | | | | | | | This matches the CodeGen tests and makes it a little easy to run these from the command line manually. Differential Revision: https://reviews.llvm.org/D42440 llvm-svn: 323275
* [WebAssembly] Store function index rather than table index in TABLE_INDEX ↵Sam Clegg2018-01-231-1/+1
| | | | | | | | | | | | | | | | | | | | | relocations Relocations of type R_WEBASSEMBLY_TABLE_INDEX represent places where the table index for a given function is needed. While the value stored in this location is a table index, the index in the relocation entry itself is a function index (the index of the function which is to be called indirectly). This is how is was spec'd originally but the LLVM implementation didn't do this. This makes things a little simpler in the linker since the table in the input file can essentially be ignored that the output table can be created purely based on these relocations. Patch by Nicholas Wilson! Differential Revision: https://reviews.llvm.org/D42080 llvm-svn: 323165
* [WebAssembly] MC: Start table at offset 1 rather than 0Sam Clegg2018-01-191-2/+2
| | | | | | | | | | | | | | | Summary: For consistency with the output of lld. This is useful in runnable binaries as can them be sure the null function pointer will never be a valid argument call_indirect. Subscribers: jfb, dschuff, jgravelle-google, aheejin, sunfish, llvm-commits Differential Revision: https://reviews.llvm.org/D42284 llvm-svn: 322978
* Reland "[WebAssembly] Import the linear memory and function table."Sam Clegg2017-12-111-1/+5
| | | | | | Original change: https://reviews.llvm.org/D40875 llvm-svn: 320432
* Revert "[WebAssembly] Import the linear memory and function table."Sam Clegg2017-12-071-5/+1
| | | | | | | | | We need to a little time to prepare and lld-side change that supports this. Original change: https://reviews.llvm.org/D40875 llvm-svn: 320003
* [WebAssembly] Import the linear memory and function table.Dan Gohman2017-12-061-1/+5
| | | | | | | | | | | | Instead of having .o files contain linear-memory and function table definitions, use imports. This is more consistent with the stack pointer being imported, and it's consistent with the linker being the one to decide whether linear memory and function table are imported or defined in the linked output. This implements tool-conventions #23. Differential Revision: https://reviews.llvm.org/D40875 llvm-svn: 319989
* [WebAssembly] Fix types for address taken functionsSam Clegg2017-07-051-20/+29
| | | | | | Differential Revision: https://reviews.llvm.org/D34966 llvm-svn: 307198
* [WebAssembly] Fix symbol type for addresses of external functionsSam Clegg2017-06-131-0/+25
These symbols were previously not being marked as functions so were appearing as globals instead, and with the incorrect relocation type. Without this fix, objects that take address of external functions include them as global imports rather than function imports which then fails at link time. Differential Revision: https://reviews.llvm.org/D34068 llvm-svn: 305263
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