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* MC: Fix associative sections on COFFDavid Majnemer2014-06-27
| | | | | | | | | 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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211913 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert "Introduce a string_ostream string builder facilty"Alp Toker2014-06-26
| | | | | | Temporarily back out commits r211749, r211752 and r211754. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211814 91177308-0d34-0410-b5e6-96231b3b80d8
* Introduce a string_ostream string builder faciltyAlp Toker2014-06-26
| | | | | | | | | | | | | | | | | | | | 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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211749 91177308-0d34-0410-b5e6-96231b3b80d8
* MC: Cleanup parseMSInlineAsmDavid Majnemer2014-06-23
| | | | | | | | | Utilize range based for-loops to simplify some code. Use insert() instead of a loop for simplicity/efficiency. No functionality change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211486 91177308-0d34-0410-b5e6-96231b3b80d8
* MC: adjust text section flags for WoASaleem Abdulrasool2014-06-22
| | | | | | | | | | | | | | | | | | | | | | | 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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211481 91177308-0d34-0410-b5e6-96231b3b80d8
* Emit DWARF info for all code section in an assembly fileOliver Stannard2014-06-19
| | | | | | | | | | 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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211273 91177308-0d34-0410-b5e6-96231b3b80d8
* MS asm: Properly handle quoted symbol namesDavid Majnemer2014-06-19
| | | | | | | | | | | | | 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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211249 91177308-0d34-0410-b5e6-96231b3b80d8
* MC: do not add comment string to the AsmToken in AsmLexer::LexLineCommentSaleem Abdulrasool2014-06-18
| | | | | | | | Fixes macros with varargs if the macro instantiation has a trailing comment. Patch by Janne Grunau! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211219 91177308-0d34-0410-b5e6-96231b3b80d8
* MCAsmParser: full support for gas' '.if{cond} expression' directivesSaleem Abdulrasool2014-06-18
| | | | | | Patch by Janne Grunau! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211218 91177308-0d34-0410-b5e6-96231b3b80d8
* AsmMatchers: Use unique_ptr to manage ownership of MCParsedAsmOperandDavid Blaikie2014-06-08
| | | | | | | | | | | | 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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210427 91177308-0d34-0410-b5e6-96231b3b80d8
* MC: make ELF .type handling more GNU AS compatibleSaleem Abdulrasool2014-06-08
| | | | | | | | | | | | | | 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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210407 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix a few issues with comdat handling on COFF.Rafael Espindola2014-06-06
| | | | | | | | | | | | | | | | | | | | | * Section association cannot use just the section name as many sections can have the same name. With this patch, the comdat symbol in an assoc section is interpreted to mean a symbol in the associated section and the mapping is discovered from it. * Comdat symbols were not being set correctly. Instead we were getting whatever was output first for that section. A consequence is that associative sections now must use .section to set the association. Using .linkonce would not work since it is not possible to change a sections comdat symbol (it is used to decide if we should create a new section or reuse an existing one). This includes r210298, which was reverted because it was asserting on an associated section having the same comdat as the associated section. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210367 91177308-0d34-0410-b5e6-96231b3b80d8
* MC: initialise MCAsmParser variableSaleem Abdulrasool2014-05-22
| | | | | | | Properly initialise HadError to false during construction. Detected as use-of-uninitialised variable by MSan! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209393 91177308-0d34-0410-b5e6-96231b3b80d8
* MC: loosen an overzealous assertionSaleem Abdulrasool2014-05-21
| | | | | | | | Permit active macro expansions when terminating the assembler if there were errors during the expansion. This would only trigger on invalid input when built with assertions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209309 91177308-0d34-0410-b5e6-96231b3b80d8
* raw_ostream: Forward declare OpenFlags and include FileSystem.h only where ↵Benjamin Kramer2014-04-29
| | | | | | necessary. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207593 91177308-0d34-0410-b5e6-96231b3b80d8
* [C++] Use 'nullptr'.Craig Topper2014-04-24
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207083 91177308-0d34-0410-b5e6-96231b3b80d8
* Integrated assbemler, macros: added 'vararg' argument qualifier support.Stepan Dyatkovskiy2014-04-23
| | | | | | | | Note, currently we have no 'vararg' support for darwin macros. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206951 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix the assembler to print a better relocatable expression errorKevin Enderby2014-04-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | diagnostic that includes location information. Currently if one has this assembly: .quad (0x1234 + (4 * SOME_VALUE)) where SOME_VALUE is undefined ones gets the less than useful error message with no location information: % clang -c x.s clang -cc1as: fatal error: error in backend: expected relocatable expression With this fix one now gets a more useful error message with location information: % clang -c x.s x.s:5:8: error: expected relocatable expression .quad (0x1234 + (4 * SOME_VALUE)) ^ To do this I plumbed the SMLoc through the MCObjectStreamer EmitValue() and EmitValueImpl() interfaces so it could be used when creating the MCFixup. rdar://12391022 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206906 91177308-0d34-0410-b5e6-96231b3b80d8
* DebugInfo: Emit relocation to debug_line section when emitting asm for asmDavid Blaikie2014-04-01
| | | | | | | | | | | | | | I don't think this is reachable by any frontend (why would you transform asm to asm+debug info?) but it helps tidy up some of this code, avoid the weird special case of "emit the first CU, store the label, then emit the rest" in MCDwarfLineTable::Emit by instead having the DWARF-for-assembly case use the same codepath as DwarfDebug.cpp, by registering the label of the debug_line section, thus causing it to be emitted. (with a special case in asm output to just emit the label since asm output uses the .loc directives, etc, rather than the debug_loc directly) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205286 91177308-0d34-0410-b5e6-96231b3b80d8
* Map ELf flags back to more specific section kinds.Rafael Espindola2014-03-28
| | | | | | With that, convert another llc -filetype=obj test. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205031 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove some dead assignements found by scan-buildArnaud A. de Grandmaison2014-03-21
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204526 91177308-0d34-0410-b5e6-96231b3b80d8
* MCParser: add an assertionSaleem Abdulrasool2014-03-21
| | | | | | | Add an assertion that the section is not NULL. Potential NULL pointer dereference identified by clang static analyzer. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204429 91177308-0d34-0410-b5e6-96231b3b80d8
* Tidy up. Update per naming conventions.Jim Grosbach2014-03-18
| | | | | | No functional change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204192 91177308-0d34-0410-b5e6-96231b3b80d8
* Darwin: Add assembler directives to create version-min load commands.Jim Grosbach2014-03-18
| | | | | | | | | | | | Allow object files to be tagged with a version-min load command for iOS or MacOSX. Teach macho-dump to understand the version-min load commands for testcases. rdar://11337778 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204190 91177308-0d34-0410-b5e6-96231b3b80d8
* MC: change runtime check to an assertionSaleem Abdulrasool2014-03-17
| | | | | | | | It is unclear how it would be possible to get M to be NULL in normal scenarios. Change this to an assert rather than a runtime check as per dblakie's suggestion. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204060 91177308-0d34-0410-b5e6-96231b3b80d8
* DebugInfo: Improve reuse of file table entries in asm debug infoDavid Blaikie2014-03-17
| | | | | | | | | | | | | | | | | The previous deduping strategy was woefully inadequate - it only considered the most recent file used and avoided emitting a duplicate in that case - never considering the a/b/a scenario. It was also lacking when it came to directory paths as the previous filename would never match the current if the filename had been split into file and directory components. This change builds caching functionality into the line table at the lowest level in an optional form (a file number of 0 indicates that one should be chosen and returned) and will eventually be reused by the normal source level debugging DWARF emission. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204027 91177308-0d34-0410-b5e6-96231b3b80d8
* MCDwarf: Simplify MCDwarfFile to just use std::string instead of cunning use ↵David Blaikie2014-03-13
| | | | | | | | | | | | | of MCContext's allocator. There aren't /that/ many files, and we are already using various maps and other standard containers that don't use MCContext's allocator to store these values, so this doesn't seem to be critical and simplifies the design (I'll be moving construction out of MCContext shortly so it'd be annoying to have to pass the allocator around to allocate these things... and we'll have non-MCContext users (debug_line.dwo) shortly) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203831 91177308-0d34-0410-b5e6-96231b3b80d8
* MCDwarf: Simply MCDwarfFile since it really is just a StringRef and unsigned.David Blaikie2014-03-13
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203827 91177308-0d34-0410-b5e6-96231b3b80d8
* Use printable names to implement directional labels.Rafael Espindola2014-03-13
| | | | | | | | | | | | | | This changes the implementation of local directional labels to use a dedicated map. With that it can then just use CreateTempSymbol, which is what the rest of MC uses. CreateTempSymbol doesn't do a great job at making sure the names are unique (or being efficient when the names are not needed), but that should probably be fixed in a followup patch. This fixes pr18928. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203826 91177308-0d34-0410-b5e6-96231b3b80d8
* MC: fix silly typoSaleem Abdulrasool2014-03-13
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203763 91177308-0d34-0410-b5e6-96231b3b80d8
* MC: fix possible NULL pointer dereferenceSaleem Abdulrasool2014-03-13
| | | | | | Avoid NULL pointer scenario found via clang's static analyzer. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203745 91177308-0d34-0410-b5e6-96231b3b80d8
* [C++11] Add 'override' keyword to virtual methods that override their base ↵Craig Topper2014-03-08
| | | | | | class. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203342 91177308-0d34-0410-b5e6-96231b3b80d8
* MC: Use MachO::SectionType for MCSectionMachO::getType's return typeDavid Majnemer2014-03-07
| | | | | | | | | | This is a straightfoward replacement, it makes debugging a little easier. This has no functional impact. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203264 91177308-0d34-0410-b5e6-96231b3b80d8
* MC: Remove superfluous section attribute flag definitionsDavid Majnemer2014-03-07
| | | | | | | | | | | | | | | | | | | Summary: llvm/MC/MCSectionMachO.h and llvm/Support/MachO.h both had the same definitions for the section flags. Instead, grab the definitions out of support. No functionality change. Reviewers: grosbach, Bigcheese, rafael Reviewed By: rafael CC: llvm-commits Differential Revision: http://llvm-reviews.chandlerc.com/D2998 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203211 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove unreachable 'return true' always dominated by 'return Error' or ↵Ted Kremenek2014-03-06
| | | | | | 'return false'. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203171 91177308-0d34-0410-b5e6-96231b3b80d8
* MS asm: The initial dot in struct access is optionalReid Kleckner2014-03-06
| | | | | | | | Fixes PR18994. Tests, once again, in that other repository. =P git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203146 91177308-0d34-0410-b5e6-96231b3b80d8
* Add support for parsing sun-style section flags in ELFAsmParser.Venkatraman Govindaraju2014-03-01
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202573 91177308-0d34-0410-b5e6-96231b3b80d8
* Replace the F_Binary flag with a F_Text one.Rafael Espindola2014-02-24
| | | | | | | | | After this I will set the default back to F_None. The advantage is that before this patch forgetting to set F_Binary would corrupt a file on windows. Forgetting to set F_Text produces one that cannot be read in notepad, which is a better failure mode :-) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202052 91177308-0d34-0410-b5e6-96231b3b80d8
* Asm Parser: support .error directiveSaleem Abdulrasool2014-02-23
| | | | | | | | The .error directive is similar to .err in that it will halt assembly if it is evaluated for assembly. However, it permits a user supplied message to be rendered. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201999 91177308-0d34-0410-b5e6-96231b3b80d8
* AsmParser: support .ifeqs directiveSaleem Abdulrasool2014-02-23
| | | | | | | The .ifeqs directive assembles the following code if the quoted string parameters are equal. The strings must be quoted using double quotes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201998 91177308-0d34-0410-b5e6-96231b3b80d8
* MCAsmParser: support .ifneSaleem Abdulrasool2014-02-23
| | | | | | | The .ifne directive assembles the following section of code if the argument expression is non-zero. Effectively, it is equivalent to if. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201986 91177308-0d34-0410-b5e6-96231b3b80d8
* MCAsmParser: handle space properly for .ifc/.ifncSaleem Abdulrasool2014-02-23
| | | | | | | | If the strings are not quoted, the first string stops at the first comma, and the second string stops at the end of the line. Strings which contain whitespace should be quoted. Unquoted space is to be discarded. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201985 91177308-0d34-0410-b5e6-96231b3b80d8
* MCAsmParser: add support for .err directiveSaleem Abdulrasool2014-02-23
| | | | | | | The .err directive produces an error whenever it is assembled. This can be useful for preventing assembly when an unexpected condition occurs. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201984 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove dead declarationSylvestre Ledru2014-02-21
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201863 91177308-0d34-0410-b5e6-96231b3b80d8
* AsmParser: Disable Darwin-style macro argument expansion on non-darwin targets.Benjamin Kramer2014-02-20
| | | | | | There is code in the wild that relies on $0 not being expanded. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201784 91177308-0d34-0410-b5e6-96231b3b80d8
* MCAsmParser: support required parametersSaleem Abdulrasool2014-02-19
| | | | | | | | | | | This enhances the macro parser to parse and handle parameter qualifications, which is needed to support required formal parameters in macro definitions. A required parameter may not be defaulted (though providing a default value is accepted with a warning). This improves GAS compatibility. Partially addresses PR9248. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201630 91177308-0d34-0410-b5e6-96231b3b80d8
* MCAsmParser: change representation of MCAsmMacroParameterSaleem Abdulrasool2014-02-19
| | | | | | | | | | Rather than using std::pair, create a structure to represent the type. This is a preliminary refactoring to enable required parameter handling. Additional state is needed to indicate required parameters. This has a minor side effect of improving readability by providing more accurate names compared to first and second. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201629 91177308-0d34-0410-b5e6-96231b3b80d8
* Add support for assigning to . in AsmParser.Anders Waldenborg2014-02-17
| | | | | | | | | | | This is implemented by handling assignments to the '.' pseudo symbol as ".org" directives. Differential Revision: http://llvm-reviews.chandlerc.com/D2625 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201530 91177308-0d34-0410-b5e6-96231b3b80d8
* MCAsmParser: better handling for named argumentsSaleem Abdulrasool2014-02-17
| | | | | | | | | | | | | | | | | | | Until this point only macro definition with named parameters were parsed but the names were ignored. This adds support for using that information for named parameter instantiation. In order to support the full semantics of the keyword arguments, the arguments are no longer lazily initialised since the keyword arguments can be specified out of order and partially if they are defaulted. Prepopulate the arguments with the default value for any defaulted parameters, and then parse the specified arguments. This simplies some of the handling of the arguments in the inner loop since empty arguments simply increment the parameter index and move on. Note that keyword and positional arguments cannot be mixed. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201499 91177308-0d34-0410-b5e6-96231b3b80d8
* MCAsmParser: relax declaration parsingSaleem Abdulrasool2014-02-16
| | | | | | | | The Linux kernel defines empty macros for compatibility with ARM UAL syntax. The comma after the name is optional, and if present can be safely lexed. This improves compatibility with the GNU assembler. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201474 91177308-0d34-0410-b5e6-96231b3b80d8
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