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* Avoid revocations when possible.Rafael Espindola2014-07-011-1/+16
| | | | | | | | This is a small targeted fix for pr20119. The code needs quiet a bit of refactoring and I added some FIXMEs about it, but I want to get the testcase passing first. llvm-svn: 212101
* Fix .seh_stackalloc 0Reid Kleckner2014-07-011-0/+2
| | | | | | | | | | | | | seh_stackalloc 0 is not representable in Win64 SEH info, so emitting it is a bug. Reviewers: rnk Differential Revision: http://reviews.llvm.org/D4334 Patch by Vadim Chugunov! llvm-svn: 212081
* MC: rename EmitWin64EH routinesSaleem Abdulrasool2014-06-294-69/+69
| | | | | | | | | | | | | | | Rename the routines to reflect the reality that they are more related to call frame information than to Win64 EH. Although EH is implemented in an intertwined manner by augmenting with an exception handler and an associated parameter, the majority of these routines emit information required to unwind the frames. This also helps identify that these routines are generic for most windows platforms (they apply equally to nearly all architectures except x86) although the encoding of the information is architecture dependent. Unwinding data is emitted via EmitWinCFI* and exception handling information via EmitWinEH*. llvm-svn: 211994
* MC: Fix associative sections on COFFDavid Majnemer2014-06-272-8/+8
| | | | | | | | | COFF sections in MC were represented by a tuple of section-name and COMDAT-name. This is not sufficient to represent a .text section associated with another .text section; we need a way to distinguish between the key section and the one marked associative. llvm-svn: 211913
* Revert "Introduce a string_ostream string builder facilty"Alp Toker2014-06-265-16/+25
| | | | | | Temporarily back out commits r211749, r211752 and r211754. llvm-svn: 211814
* Introduce a string_ostream string builder faciltyAlp Toker2014-06-265-25/+16
| | | | | | | | | | | | | | | | | | | | string_ostream is a safe and efficient string builder that combines opaque stack storage with a built-in ostream interface. small_string_ostream<bytes> additionally permits an explicit stack storage size other than the default 128 bytes to be provided. Beyond that, storage is transferred to the heap. This convenient class can be used in most places an std::string+raw_string_ostream pair or SmallString<>+raw_svector_ostream pair would previously have been used, in order to guarantee consistent access without byte truncation. The patch also converts much of LLVM to use the new facility. These changes include several probable bug fixes for truncated output, a programming error that's no longer possible with the new interface. llvm-svn: 211749
* Merge the used symbol scanning of MCObjectStreamer and RecordStreamer.Rafael Espindola2014-06-253-10/+16
| | | | | | This completes the refactoring of RecordStreamer. llvm-svn: 211727
* Move expression visitation logic up to MCStreamer.Rafael Espindola2014-06-252-26/+29
| | | | | | Remove the duplicate from MCRecordStreamer. No functionality change. llvm-svn: 211714
* Simplify the visitation of target expressions. No functionality change.Rafael Espindola2014-06-251-11/+15
| | | | llvm-svn: 211707
* Simplify AddValueSymbols. No functionality change.Rafael Espindola2014-06-251-4/+3
| | | | llvm-svn: 211701
* Re-apply r211399, "Generate native unwind info on Win64" with a fix to ↵NAKAMURA Takumi2014-06-252-5/+12
| | | | | | | | | | | | | | | | | | | | | | | ignore SEH pseudo ops in X86 JIT emitter. -- This patch enables LLVM to emit Win64-native unwind info rather than DWARF CFI. It handles all corner cases (I hope), including stack realignment. Because the unwind info is not flexible enough to describe stack frames with a gap of unknown size in the middle, such as the one caused by stack realignment, I modified register spilling code to place all spills into the fixed frame slots, so that they can be accessed relative to the frame pointer. Patch by Vadim Chugunov! Reviewed By: rnk Differential Revision: http://reviews.llvm.org/D4081 llvm-svn: 211691
* Fix another asserting method in the null streamer.Rafael Espindola2014-06-251-1/+0
| | | | llvm-svn: 211668
* Fix a regression from r211653.Rafael Espindola2014-06-251-1/+0
| | | | | | | The method was empty in the null streamer but I mistakenly replaced it with the aborting one in MCStreamer. llvm-svn: 211666
* MCNullStreamer.cpp: Roll back a few empty methods that have been marked as ↵NAKAMURA Takumi2014-06-251-1/+2
| | | | | | | | | | | unreachable in MCStreamer.cpp. void EmitCOFFSecRel32(MCSymbol const *Symbol) override {} void EmitGPRel32Value(const MCExpr *Value) override {} It should fix crash like "llc -mtriple=i686-cygwin -filetype=null". llvm-svn: 211664
* Move some trivial methods up to MCStreamer.Rafael Espindola2014-06-252-45/+33
| | | | | | This saves some duplicated boilerplate in RecordStreamer and NullStreamer. llvm-svn: 211653
* Simplify the handling of .cfi_endproc.Rafael Espindola2014-06-254-21/+9
| | | | | | No functionality change. llvm-svn: 211651
* Simplify EmitLabel.Rafael Espindola2014-06-241-5/+0
| | | | | | | All the "real" streamers were already calling to MCStreamer::EmitLabel to do part of the work. llvm-svn: 211646
* Print a=b as an assignment.Rafael Espindola2014-06-248-35/+1
| | | | | | | | | | | In assembly the expression a=b is parsed as an assignment, so it should be printed as one. This remove a truly horrible hack for producing a label with "a=.". It would be used by codegen but would never be reached by the asm parser. Sorry I missed this when it was first committed. llvm-svn: 211639
* Allow using .cfi_startproc without a leading symbol.Rafael Espindola2014-06-232-10/+2
| | | | | | This is possible now that we don't produce .eh symbols. This fixes pr19430. llvm-svn: 211502
* Stop producing func.eh symbols on Darwin.Rafael Espindola2014-06-232-9/+0
| | | | | | | | | | According Nick Kledzik (http://llvm.org/bugs/show_bug.cgi?id=19430#c2): "... mach-o no longer needs names in the __eh_frame section (and has not for years)." Iain Sandoe confirms it is also unnecessary for their old darwin support. llvm-svn: 211500
* MC: Cleanup parseMSInlineAsmDavid Majnemer2014-06-231-16/+13
| | | | | | | | | Utilize range based for-loops to simplify some code. Use insert() instead of a loop for simplicity/efficiency. No functionality change. llvm-svn: 211486
* MC: adjust text section flags for WoASaleem Abdulrasool2014-06-222-8/+15
| | | | | | | | | | | | | | | | | | | | | | | Correct the section flags for code built for Windows on ARM with `-ffunction-sections`. Windows on ARM uses solely Thumb-2 instructions, and indicates that the function is thumb by placing it in a text section that has IMAGE_SCN_MEM_16BIT flag set. When we encounter a .section directive, a new section is constructed. This may be a text segment. In order to identify that we need the additional flag, expose the target triple through the ObjectFileInfo as this information is lost otherwise. Since any modern ARM targeting environment on Windows would be Thumb-2 (Windows ARM NT or Windows Embedded Compact), introducing a new flag to indicate the section attribute seems to be a bit overkill. Simply depend on the target triple. Since there is one location that this information is currently needed, creating a target specific assembly parser and delegating the parsing of section switches also feels a bit heavy handed. If it turns out that this information ends up changing additional behaviour, then it may be worth considering that alternative. llvm-svn: 211481
* Revert r211399, "Generate native unwind info on Win64"NAKAMURA Takumi2014-06-222-12/+5
| | | | | | It broke Legacy JIT Tests on x86_64-{mingw32|msvc}, aka Windows x64. llvm-svn: 211480
* Report error for non-zero data in .bssWeiming Zhao2014-06-221-2/+8
| | | | | | | | | | | | User may initialize a var with non-zero value and specify .bss section. E.g. : int a __attribute__((section(".bss"))) = 2; This patch converts an assertion to error report for better user experience. Differential Revision: http://reviews.llvm.org/D4199 llvm-svn: 211455
* Always use a temp symbol for CIE.Rafael Espindola2014-06-201-6/+1
| | | | | | Fixes pr19185. llvm-svn: 211423
* Use compact unwind for the iOS simulator.Rafael Espindola2014-06-201-0/+5
| | | | | | Another step in fixing pr19185. llvm-svn: 211416
* Use a helper function and clang-format.Rafael Espindola2014-06-201-6/+19
| | | | | | No functionality change. llvm-svn: 211415
* Generate native unwind info on Win64Reid Kleckner2014-06-202-5/+12
| | | | | | | | | | | | | | | | | | | | This patch enables LLVM to emit Win64-native unwind info rather than DWARF CFI. It handles all corner cases (I hope), including stack realignment. Because the unwind info is not flexible enough to describe stack frames with a gap of unknown size in the middle, such as the one caused by stack realignment, I modified register spilling code to place all spills into the fixed frame slots, so that they can be accessed relative to the frame pointer. Patch by Vadim Chugunov! Reviewed By: rnk Differential Revision: http://reviews.llvm.org/D4081 llvm-svn: 211399
* Fix up a few formatting issues.Eric Christopher2014-06-191-14/+13
| | | | llvm-svn: 211307
* MCNullStreamer: assign file IDs to resolve crashes and errorsAlp Toker2014-06-191-9/+1
| | | | | | | | | | Use the MCStreamer base implementations for file ID tracking instead of overriding them as no-ops. Avoids assertions when streaming Dwarf debug info, and fixes ASM parsing of loc and file directives. llvm-svn: 211282
* Emit DWARF info for all code section in an assembly fileOliver Stannard2014-06-194-57/+189
| | | | | | | | Currently, when using llvm as an assembler, DWARF debug information is only generated for the .text section. This patch modifies this so that DWARF info is emitted for all executable sections. llvm-svn: 211273
* Emit DWARF3 call frame information when DWARF3+ debug info is requestedOliver Stannard2014-06-191-2/+12
| | | | | | | | | | | | | | | | Currently, llvm always emits a DWARF CIE with a version of 1, even when emitting DWARF 3 or 4, which both support CIE version 3. This patch makes it emit the newer CIE version when we are emitting DWARF 3 or 4. This will not reduce compatibility, as we already emit other DWARF3/4 features, and is worth doing as the DWARF3 spec removed some ambiguities in the interpretation of call frame information. It also fixes a minor bug where the "return address" field of the CIE was encoded as a ULEB128, which is only valid when the CIE version is 3. There are no test changes for this, because (as far as I can tell) none of the platforms that we test have a return address register with a DWARF register number >127. llvm-svn: 211272
* Move -dwarf-version to an MC level command line option so it'sEric Christopher2014-06-191-1/+2
| | | | | | | used by all of the MC level tools and codegen. Fix up all uses in the compiler to use this and set it on the context accordingly. llvm-svn: 211257
* Convert some assert(0) to llvm_unreachable or fold an 'if' condition into ↵Craig Topper2014-06-191-2/+1
| | | | | | the assert. llvm-svn: 211254
* MS asm: Properly handle quoted symbol namesDavid Majnemer2014-06-191-1/+13
| | | | | | | | | | | | | We would get confused by '@' characters in symbol names, we would mistake the text following them for the variant kind. When an identifier a string, the variant kind will never show up inside of it. Instead, check to see if there is a variant following the string. This fixes PR19965. llvm-svn: 211249
* MC: do not add comment string to the AsmToken in AsmLexer::LexLineCommentSaleem Abdulrasool2014-06-181-2/+2
| | | | | | | | Fixes macros with varargs if the macro instantiation has a trailing comment. Patch by Janne Grunau! llvm-svn: 211219
* MCAsmParser: full support for gas' '.if{cond} expression' directivesSaleem Abdulrasool2014-06-181-8/+41
| | | | | | Patch by Janne Grunau! llvm-svn: 211218
* [ARM] [MC] Refactor the constant pool classesWeiming Zhao2014-06-182-0/+96
| | | | | | | | | | | ARMTargetStreamer implements ConstantPool and AssmeblerConstantPools to keep track of assembler-generated constant pools that are used for ldr-pseudo. When implementing ldr-pseudo for AArch64, these two classes can be reused. So this patch factors them out from ARM target to the general MC lib. llvm-svn: 211198
* Using llvm::sys::swapByteOrder() for the common case of byte-swapping a ↵Artyom Skrobov2014-06-141-1/+1
| | | | | | value in place llvm-svn: 210978
* Renaming SwapByteOrder() to getSwappedBytes()Artyom Skrobov2014-06-141-1/+1
| | | | | | The next commit will add swapByteOrder(), acting in-place llvm-svn: 210973
* Remove 'using std::errro_code' from lib.Rafael Espindola2014-06-132-4/+2
| | | | llvm-svn: 210871
* Don't use 'using std::error_code' in include/llvm.Rafael Espindola2014-06-122-0/+2
| | | | | | This should make sure that most new uses use the std prefix. llvm-svn: 210835
* MC: add enumeration of WinEH data encodingSaleem Abdulrasool2014-06-111-1/+2
| | | | | | | | | | | | | | | Most Windows platforms use auxiliary data for unwinding. This information is stored in the .pdata section. The encoding format for the data differs between architectures and Windows variants. Windows MIPS and Alpha use identical formats; Alpha64 is the same with different widths. Windows x86_64 and Itanium share the representation. All Windows CE entries are identical irrespective of the architecture. ARMv7 (Windows [NT] on ARM) has its own format. This enumeration will become the differentiator once the windows EH emission infrastructure is generalised, allowing us to emit the necessary unwinding information for Windows on ARM. llvm-svn: 210634
* Revert "Patch by Ray Donnelly to print register names instead of numbers."Reid Kleckner2014-06-101-11/+4
| | | | | | | | | | | | | This reverts commit r206683. The code was confusing SEH register numbers with DWARF register numbers. The test case it was committed with was obviously incorrect. The disassembler was roundtripping '.seh_pushreg %rsi' as '.seh_pushreg %rbp', and other exciting things. Noticed by Vadim Chugunov. llvm-svn: 210574
* Fix gcc warning (enumeral and non-enumeral type in conditional expression)Patrik Hagglund2014-06-091-1/+2
| | | | llvm-svn: 210450
* AsmMatchers: Use unique_ptr to manage ownership of MCParsedAsmOperandDavid Blaikie2014-06-081-19/+12
| | | | | | | | | | | | I saw at least a memory leak or two from inspection (on probably untested error paths) and r206991, which was the original inspiration for this change. I ran this idea by Jim Grosbach a few weeks ago & he was OK with it. Since it's a basically mechanical patch that seemed sufficient - usual post-commit review, revert, etc, as needed. llvm-svn: 210427
* MC: fix text section characteristics for WoASaleem Abdulrasool2014-06-081-0/+3
| | | | | | | | | | link.exe requires that the text section has the IMAGE_SCN_MEM_16BIT flag set. Otherwise, it will treat the function as ARM. If this occurs, then jumps to the function will fail, switching from thumb to ARM mode execution. With this change, it is possible to link using the MSVC linker as well. llvm-svn: 210415
* MC: make ELF .type handling more GNU AS compatibleSaleem Abdulrasool2014-06-081-38/+34
| | | | | | | | | | | | | | GAS documents the .type directive as having an optional comma following the key symbol name when using the STT_<TYPE_IN_UPPER_CASE> form. However, it treats the comma as optional in all cases. This makes the IAS support both forms of inputs. Furthermore, the prefixed forms take either the upper case name or the lower case alias. The tests are split into two separate sets as the hash character serves as a comment character on x86, which is tested in the second set by using arm-elf which uses the at symbol as a comment character. llvm-svn: 210407
* MC: fix ctor/dtor section for windows-itaniumSaleem Abdulrasool2014-06-081-1/+1
| | | | | | | | This adjusts the section setup for the windows-itanium environment. This environment does not report to be a known windows msvc environment, even though it is (nearly) identical to the MSVC environment for C code. llvm-svn: 210406
* MC: whitespace, grouping for COFF section setupSaleem Abdulrasool2014-06-081-26/+33
| | | | | | | | Add some whitespace, combine two sequential conditionals into a single one. Reformat some section definitions to maintain uniformity in the function. NFC. llvm-svn: 210405
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