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* Add support for subsections to the ELF assembler. Fixes PR8717.Peter Collingbourne2013-04-171-1/+9
| | | | | | Differential Revision: http://llvm-reviews.chandlerc.com/D598 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179725 91177308-0d34-0410-b5e6-96231b3b80d8
* Give the MCStreamer class hierarchy LLVM RTTI facilities for use withChandler Carruth2013-01-311-2/+6
| | | | | | | | | | | | | | | | isa<> and dyn_cast<>. In several places, code is already hacking around the absence of this, and there seem to be several interfaces that might be lifted and/or devirtualized using this. This change was based on a discussion with Jim Grosbach about how best to handle testing for specific MCStreamer subclasses. He said that this was the correct end state, and everything else was too hacky so I decided to just make it so. No functionality should be changed here, this is just threading the kind through all the constructors and setting up the classof overloads. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174113 91177308-0d34-0410-b5e6-96231b3b80d8
* These functions have default arguments of 0 for the last arg. UseEric Christopher2013-01-091-2/+2
| | | | | | them and add one where it seemed obvious that we wanted one. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171932 91177308-0d34-0410-b5e6-96231b3b80d8
* Add the align_to_end option to .bundle_lock in the MC implementation of alignedEli Bendersky2013-01-071-1/+1
| | | | | | | | | | bundling. The document describing this feature and the implementation has also been updated: https://sites.google.com/a/chromium.org/dev/nativeclient/pnacl/aligned-bundling-support-in-llvm git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171797 91177308-0d34-0410-b5e6-96231b3b80d8
* Aligned bundling support. Following the discussion here:Eli Bendersky2012-12-201-0/+7
| | | | | | | | | | | | http://lists.cs.uiuc.edu/pipermail/llvmdev/2012-December/056754.html The proposal and implementation are fully documented here: https://sites.google.com/a/chromium.org/dev/nativeclient/pnacl/aligned-bundling-support-in-llvm Tests will follow shortly. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170718 91177308-0d34-0410-b5e6-96231b3b80d8
* This patch is needed to make c++ exceptions work for mips16.Reed Kotler2012-12-161-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Mips16 is really a processor decoding mode (ala thumb 1) and in the same program, mips16 and mips32 functions can exist and can call each other. If a jal type instruction encounters an address with the lower bit set, then the processor switches to mips16 mode (if it is not already in it). If the lower bit is not set, then it switches to mips32 mode. The linker knows which functions are mips16 and which are mips32. When relocation is performed on code labels, this lower order bit is set if the code label is a mips16 code label. In general this works just fine, however when creating exception handling tables and dwarf, there are cases where you don't want this lower order bit added in. This has been traditionally distinguished in gas assembly source by using a different syntax for the label. lab1: ; this will cause the lower order bit to be added lab2=. ; this will not cause the lower order bit to be added In some cases, it does not matter because in dwarf and debug tables the difference of two labels is used and in that case the lower order bits subtract each other out. To fix this, I have added to mcstreamer the notion of a debuglabel. The default is for label and debug label to be the same. So calling EmitLabel and EmitDebugLabel produce the same result. For various reasons, there is only one set of labels that needs to be modified for the mips exceptions to work. These are the "$eh_func_beginXXX" labels. Mips overrides the debug label suffix from ":" to "=." . This initial patch fixes exceptions. More changes most likely will be needed to DwarfCFException to make all of this work for actual debugging. These changes will be to emit debug labels in some places where a simple label is emitted now. Some historical discussion on this from gcc can be found at: http://gcc.gnu.org/ml/gcc-patches/2008-08/msg00623.html http://gcc.gnu.org/ml/gcc-patches/2008-11/msg01273.html git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170279 91177308-0d34-0410-b5e6-96231b3b80d8
* Make the MCStreamer have a reset method and call that after finalization of ↵Pedro Artigas2012-12-121-0/+5
| | | | | | | | | | the asm printer, also changed MCContext to a single reset only method for simplicity as requested on the list git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170041 91177308-0d34-0410-b5e6-96231b3b80d8
* Lift EmitAssignment into MCObjectStreamer which gets rid of at least threeEli Bendersky2012-12-071-0/+1
| | | | | | | | duplicate implementations in format-specific streamers. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169613 91177308-0d34-0410-b5e6-96231b3b80d8
* Hoist some grossly duplicated code from the COFF/ELF/MachO streamers into ↵Benjamin Kramer2012-10-041-0/+7
| | | | | | MCObjectStreamer. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165225 91177308-0d34-0410-b5e6-96231b3b80d8
* Provide a shortcut for MCObjectStreamer when emitting fills.Benjamin Kramer2012-10-011-0/+2
| | | | | | | Reduces runtime of i386-large-relocations.s by 10x in Release builds, even more in Debug+Asserts builds. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164945 91177308-0d34-0410-b5e6-96231b3b80d8
* For mips64 switch statements in subroutines could generate Jack Carter2012-08-221-0/+1
| | | | | | | | | | | | | | within the codegen EK_GPRel64BlockAddress. This was not supported for direct object output and resulted in an assertion. This change adds support for EK_GPRel64BlockAddress for direct object. One fallout from this is to turn on rela relocations for mips64 to match gas. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162334 91177308-0d34-0410-b5e6-96231b3b80d8
* Better diagnostic for malformed .org assembly directive.Jim Grosbach2012-01-271-1/+1
| | | | | | Provide source line number information. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149101 91177308-0d34-0410-b5e6-96231b3b80d8
* Don't print an unused label before .cfi_endproc.Rafael Espindola2012-01-091-0/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147763 91177308-0d34-0410-b5e6-96231b3b80d8
* Don't print a label before .cfi_startproc when we don't need to. This makesRafael Espindola2012-01-071-0/+1
| | | | | | the produce assembly when using CFI just a bit more readable. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147743 91177308-0d34-0410-b5e6-96231b3b80d8
* Split Finish into Finish and FinishImpl to have a common place to do end ofRafael Espindola2012-01-071-1/+1
| | | | | | | | file error checking. Use that to error on an unfinished cfi_startproc. The error is not nice, but is already better than a segmentation fault. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147717 91177308-0d34-0410-b5e6-96231b3b80d8
* This patch addresses gp relative fixups/relocations for jump tables.Akira Hatanaka2011-11-231-0/+1
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* Rename TargetAsmBackend to MCAsmBackend; rename createAsmBackend to ↵Evan Cheng2011-07-251-3/+3
| | | | | | createMCAsmBackend. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136010 91177308-0d34-0410-b5e6-96231b3b80d8
* Unfortunately several files in MC are badly violating layering rule by usingEvan Cheng2011-07-141-1/+2
| | | | | | | | | | TargetAsmInfo, which in turn pulls in TargetRegisterInfo, etc. :-( There are other cases of violations, but this is probably the worst. This patch is but one small step towards fixing this. 500 more steps to go. :-( git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135131 91177308-0d34-0410-b5e6-96231b3b80d8
* Simplify the handling of pcrel relocations on ELF. Now we do the right thingRafael Espindola2011-05-011-1/+1
| | | | | | | | | | for all symbol differences and can drop the old EmitPCRelSymbolValue method. This also make getExprForFDESymbol on ELF equal to the one on MachO, and it can be made non-virtual. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130634 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove unused argument.Rafael Espindola2011-04-211-2/+2
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* Add constructors to MCElfStreamer and MCObjectStreamer to take an extra ↵Jan Sjödin2011-03-091-0/+3
| | | | | | MCAssembler * argument. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127343 91177308-0d34-0410-b5e6-96231b3b80d8
* Add support for pushsection and popsection. Patch by Joerg Sonnenberger.Rafael Espindola2011-02-161-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125629 91177308-0d34-0410-b5e6-96231b3b80d8
* Relax address updates in the eh_frame section.Rafael Espindola2010-12-281-0/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122591 91177308-0d34-0410-b5e6-96231b3b80d8
* Fixed version of 121434 with no new memory leaks.Rafael Espindola2010-12-101-1/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121471 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert my previous patch to make the valgrind bots happy.Rafael Espindola2010-12-101-2/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121461 91177308-0d34-0410-b5e6-96231b3b80d8
* Initial support for the cfi directives. This is just enough to getRafael Espindola2010-12-091-1/+2
| | | | | | | | | | | f: .cfi_startproc nop .cfi_endproc assembled (on ELF). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121434 91177308-0d34-0410-b5e6-96231b3b80d8
* Sorry for such a large commit. The summary is that only MachO cares about theRafael Espindola2010-12-071-2/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | actuall addresses in a .o file, so it is better to let the MachO writer compute it. This is good for two reasons. First, areas that shouldn't care about addresses now don't have access to it. Second, the layout of each section is independent. I should use this in a subsequent commit to speed it up. Most of the patch is just removing the section address computation. The two interesting parts are the change on how we handle padding in the end of sections and how MachO can get the address of a-b when a and b are in different sections. Since now the expression evaluation normally doesn't know the section address, it will think that a-b needs relocation and let the MachO writer know. Once it has computed the section addresses, it calls back the expression evaluation with the section addresses to resolve these expressions. The remaining problem is the handling of padding. Currently it will create a special alignment fragment at the end. Since that fragment doesn't update the alignment of the section, it needs the real address to be computed. Since now the layout will not compute a-b with a and b in different sections, the only effect that the special alignment fragment has is update the address size of the section. This can also be done by the MachO writer. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121076 91177308-0d34-0410-b5e6-96231b3b80d8
* There are two reasons why we might want to useRafael Espindola2010-12-041-2/+1
| | | | | | | | | | | | | | | | foo = a - b .long foo instead of just .long a - b First, on darwin9 64 bits the assembler produces the wrong result. Second, if "a" is the end of the section all darwin assemblers (9, 10 and mc) will not consider a - b to be a constant but will if the dummy foo is created. Split how we handle these cases. The first one is something MC should take care of. The second one has to be handled by the caller. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120889 91177308-0d34-0410-b5e6-96231b3b80d8
* Try to resolve symbol differences early, and if successful create a plainRafael Espindola2010-12-031-0/+3
| | | | | | | data fragment. This reduces the time to assemble the test in 8711 from 60s to 54s. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120767 91177308-0d34-0410-b5e6-96231b3b80d8
* Use set directive for StartMinusEndExpr.Devang Patel2010-12-021-1/+2
| | | | | | | This is a fix for llvm-gcc-i386-darwin9 buildbot failure. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120742 91177308-0d34-0410-b5e6-96231b3b80d8
* Move EmitValueToOffset to the ObjectStreamer.Rafael Espindola2010-12-021-0/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120691 91177308-0d34-0410-b5e6-96231b3b80d8
* Add EmitInstToFragment to the generic object streamer.Rafael Espindola2010-12-021-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120690 91177308-0d34-0410-b5e6-96231b3b80d8
* Move EmitValue to MCObjectStreamer.Rafael Espindola2010-11-281-0/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120269 91177308-0d34-0410-b5e6-96231b3b80d8
* Fixed verson of r120245.Rafael Espindola2010-11-281-0/+1
| | | | | | Factor some duplicated code into MCObjectStreamer::EmitLabel. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120248 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert previous patch while I debug the darwin bootstrap failure.Rafael Espindola2010-11-281-1/+0
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120246 91177308-0d34-0410-b5e6-96231b3b80d8
* Factor some duplicated code into MCObjectStreamer::EmitLabel.Rafael Espindola2010-11-281-0/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120245 91177308-0d34-0410-b5e6-96231b3b80d8
* Add support for expressions in .sleb/.uleb directives.Rafael Espindola2010-11-021-0/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118023 91177308-0d34-0410-b5e6-96231b3b80d8
* Move EmitInstruction to MCObjectStreamer so that ELF and MachO can share it.Rafael Espindola2010-11-011-0/+4
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117925 91177308-0d34-0410-b5e6-96231b3b80d8
* Implement .weakref.Rafael Espindola2010-11-011-0/+1
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* Avoid some Mach-O specific alignment being done on ELF.Rafael Espindola2010-09-221-1/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114594 91177308-0d34-0410-b5e6-96231b3b80d8
* MC: Add WinCOFFStreamer implementation and merge common code from MachOMichael J. Spencer2010-07-191-0/+11
| | | | | | | | into MCObjectStreamer. Origonal Windows COFF implementation by Nathan Jedffords. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108678 91177308-0d34-0410-b5e6-96231b3b80d8
* MC: Lift SwitchSection() and Finish() into MCObjectStreamer.Daniel Dunbar2010-06-161-0/+13
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106141 91177308-0d34-0410-b5e6-96231b3b80d8
* MC: Factor out an MCObjectStreamer class, which will be shared by the concreteDaniel Dunbar2010-06-161-0/+43
object file format writers. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106140 91177308-0d34-0410-b5e6-96231b3b80d8
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