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Commit Graph

56 Commits

Author SHA1 Message Date
Daniel Dunbar
e3d14c797d Simplify.
llvm-svn: 80176
2009-08-26 23:12:33 +00:00
Chris Lattner
17c3a9cf99 fix COFF targets (mingw/cygwin) to provide ehframe and LSDA sections
llvm-svn: 79346
2009-08-18 16:56:17 +00:00
Anton Korobeynikov
d2d8c91b9f Text sections should have 'exec' flag set. This seems to unbreak libstdc++ on linux.
Patch by Dmitry Gorbachev!

llvm-svn: 79334
2009-08-18 14:06:12 +00:00
Benjamin Kramer
d1c6b5de4e Clear the uniquing table when initializing TLOF to avoid a crash when the TLOF is reinitialized with a different MCContext.
llvm-svn: 79253
2009-08-17 17:05:44 +00:00
Richard Osborne
358842178f Update getSectionForConstant() to to allow mergable sections to be nulled out
if not supported by the ELF subtarget.

llvm-svn: 79249
2009-08-17 16:37:11 +00:00
Chris Lattner
07186e7840 the .eh_frame sections we generate need to be writable (which
is why they are datarel).  This should fix PR4724, and is fallout
from r78890.

llvm-svn: 79111
2009-08-15 16:54:02 +00:00
Chris Lattner
2c1a96d901 If ELF subtargets don't want to support 4/8/16-byte mergable sections, allow
them to null out the default section pointers.

llvm-svn: 79078
2009-08-15 06:08:34 +00:00
Dan Gohman
ba476a2945 Make these matching rules more strict so that they don't
accidentally match unrelated things.

llvm-svn: 78966
2009-08-14 00:10:19 +00:00
Bruno Cardoso Lopes
98ffbd5041 Remove HasCrazyBSS and add a flag in TAI to indicate that '.section'
must be emitted for PowerPC-Linux '.bss' section

llvm-svn: 78958
2009-08-13 23:30:21 +00:00
Bruno Cardoso Lopes
f2855aabec Change MCSectionELF to represent a section semantically instead of
syntactically as a string, very similiar to what Chris did with MachO.
The parsing support and validation is not introduced yet.

llvm-svn: 78890
2009-08-13 05:07:35 +00:00
Chris Lattner
04f74d3510 sink uniquing of sections out of MCContext into the ELF and PECOFF TLOF implementations.
MCContext no longer maintains a string -> section map.

llvm-svn: 78874
2009-08-13 00:37:15 +00:00
Chris Lattner
7ead5b498b add some comments: MCContext owns the MCSections, but it bump pointer allocates
them, so it doesn't have to explicitly free them.

llvm-svn: 78870
2009-08-13 00:21:53 +00:00
Chris Lattner
52e6d663b3 reject invalid code like:
int x __attribute__((section("_foo, _bar"))) = 4;
int y __attribute__((section("_foo, _bar, 4byte_literals"))) = 1;

llvm-svn: 78867
2009-08-13 00:05:07 +00:00
Chris Lattner
4c9dae455e implement support for uniquing MachO sections.
llvm-svn: 78866
2009-08-12 23:55:02 +00:00
Chris Lattner
7eeb032b37 reduce #includage
llvm-svn: 78860
2009-08-12 23:34:27 +00:00
Dan Gohman
24939b2c4f Tidy #includes.
llvm-svn: 78677
2009-08-11 16:02:12 +00:00
Chris Lattner
3e6da637f6 split MachO section handling stuff out to its out .h/.cpp file.
llvm-svn: 78576
2009-08-10 18:15:01 +00:00
Chris Lattner
cc70d578be Make the big switch: Change MCSectionMachO to represent a section *semantically*
instead of syntactically as a string.  This means that it keeps track of the 
segment, section, flags, etc directly and asmprints them in the right format.
This also includes parsing and validation support for llvm-mc and 
"attribute(section)", so we should now start getting errors about invalid 
section attributes from the compiler instead of the assembler on darwin.

Still todo: 
1) Uniquing of darwin mcsections
2) Move all the Darwin stuff out to MCSectionMachO.[cpp|h]
3) there are a few FIXMEs, for example what is the syntax to get the
   S_GB_ZEROFILL segment type?

llvm-svn: 78547
2009-08-10 01:39:42 +00:00
Chris Lattner
2849883bd5 1. Make MCSection an abstract class.
2. Move section switch printing to MCSection virtual method which takes a
   TAI.  This eliminates textual formatting stuff from TLOF.
3. Eliminate SwitchToSectionDirective, getSectionFlagsAsString, and 
   TLOFELF::AtIsCommentChar.

llvm-svn: 78510
2009-08-08 22:41:53 +00:00
Chris Lattner
53cc0d6439 make target-specific TLOF impls (except PIC16) create target-specific
MCSection instances.

llvm-svn: 78500
2009-08-08 20:52:13 +00:00
Chris Lattner
1c704ad33e eliminate TargetLoweringObjectFileSparc in favor of a TAI hook.
A TAI hook is appropriate in this case because this is just an
asm syntax issue, not a semantic difference. TLOF should model
the semantics of the section.

llvm-svn: 78498
2009-08-08 20:43:12 +00:00
Chris Lattner
1e8ed03507 now that getOrCreateSection is all object-file specific,
give the impls an object-file-specific name.  In the future
they can take different arguments etc.

llvm-svn: 78495
2009-08-08 20:22:20 +00:00
Chris Lattner
637296415e sink getOrCreateSection down into all the object file implementations,
now that they create *all* the sections.

llvm-svn: 78494
2009-08-08 20:14:13 +00:00
Chris Lattner
2d90fbe8be Fix several fixmes and clean up code by sinking *all* section
creation activity into the target-specific subclasses of TLOF.
Before this, globals with explicit sections could be created by
the base class.

1. make getOrCreateSection protected, add a new getExplicitSectionGlobal
   pure virtual method to assign sections to globals with a specified
   section.
2. eliminate getSpecialCasedSectionGlobals, which is now PIC specific.
3. eliminate the getKindForNamedSection virtual method, which is
   now just a static method for ELF.
4. Add implementions of getExplicitSectionGlobal for ELF/PECOFF/Darwin/PIC16.
   They are now all detangled and understandable, woo! :)

llvm-svn: 78319
2009-08-06 16:39:58 +00:00
Chris Lattner
fd211f171d expose SectionKindForGlobal to curious clients, named as
getKindForGlobal.

llvm-svn: 78156
2009-08-05 04:25:40 +00:00
Chris Lattner
8f9a2d3c85 enhance codegen to put 16-bit character strings into the
__TEXT,__ustring section on darwin.

llvm-svn: 78068
2009-08-04 16:27:13 +00:00
Chris Lattner
ec75250455 fix a fixme: don't create an explicit "CStringSection" for ELF,
it is just being used as a prefix, so forward substitute it directly.

llvm-svn: 78067
2009-08-04 16:19:50 +00:00
Chris Lattner
41ade57a63 Add support emiting for 2/4 byte mergable strings to the ".rodata.str*"
section on ELF targets.

llvm-svn: 78066
2009-08-04 16:13:09 +00:00
Chris Lattner
8df05f13da make MergeableCString be a SectionKind "abstract class", and
add new concrete versions for 1/2/4-byte mergable strings.

These are not actually created yet.

llvm-svn: 78055
2009-08-04 05:35:56 +00:00
Chris Lattner
505d63fc7f Eliminate textual section switching from the x86 backend, one
more step towards "semantics sections"

llvm-svn: 78002
2009-08-03 21:53:27 +00:00
Chris Lattner
738a9ba448 move dwarf debug info section selection stuff from TAI to
TLOF, unifying all the dwarf targets at the same time.

llvm-svn: 77889
2009-08-02 07:24:22 +00:00
Chris Lattner
6f4a366e35 convert EHFrameSection to be managed by TLOF instead of TAI.
llvm-svn: 77888
2009-08-02 06:52:36 +00:00
Chris Lattner
1c44a63eba move getDwarfExceptionSection from TAI to TLOF and rename it to
getLSDASection() to be more specific.  This makes it pretty obvious
that the ELF LSDA section is being specified wrong in PIC mode.  We're
probably getting a lot of startup-time relocations to a readonly page,
which is expensive and bad.

Someone who cares about ELF C++ should investigate this.

llvm-svn: 77847
2009-08-02 01:34:32 +00:00
Chris Lattner
06d8ca1f56 convert ctors/dtors section to be in TLOF instead of
TAI.

llvm-svn: 77842
2009-08-02 00:34:36 +00:00
Chris Lattner
05334af883 (re)introduce new simpler apis for creation sectionkinds.
llvm-svn: 77834
2009-08-01 23:57:16 +00:00
Chris Lattner
81229d1bed Remove "JumpTableDataSection" from TAI, instead, have AsmPrinter
compute it based on what it knows.  As part of this, rename getSectionForMergeableConstant
to getSectionForConstant because it works for non-mergable constants also.

The only functionality change from this is that Xcore will start dropping
its jump tables into readonly section instead of data section in -static mode.
This should be fine as the linker resolves the relocations.  If this is a
problem, let me know and we'll come up with another solution.

llvm-svn: 77833
2009-08-01 23:46:12 +00:00
Chris Lattner
0106f7031b fix a fixme by sinking various target-specific directives down into
the appropriate subclasses.

llvm-svn: 77815
2009-08-01 21:56:13 +00:00
Chris Lattner
ac27c8c8d3 coff also doesn't have a ReadOnlySection yet, (!)
llvm-svn: 77814
2009-08-01 21:49:24 +00:00
Chris Lattner
d0f608200c coff doesn't set a .bss seciton, so this is dead.
llvm-svn: 77813
2009-08-01 21:48:25 +00:00
Chris Lattner
2a9d51b703 it turns out that isWeak() was basically dead anyway. Kill off SectionInfo :-/
llvm-svn: 77812
2009-08-01 21:46:23 +00:00
Chris Lattner
cbc6752ac5 don't use isWeak anymore.
llvm-svn: 77810
2009-08-01 21:42:58 +00:00
Chris Lattner
79e9585304 Change SectionKind to be a property that is true of a *section*, it
should have no state that is specific to particular globals in the
section.  In this case, it means the removal of the "isWeak" and
"ExplicitSection" bits.  MCSection uses the new form of SectionKind.

To handle isWeak, I introduced a new SectionInfo class, which is
SectionKind + isWeak, and it is used by the part of the code generator
that does classification of a specific global.

The ExplicitSection disappears.  It is moved onto MCSection as a new
"IsDirective" bit.  Since the Name of a section is either a section
or directive, it makes sense to keep this bit in MCSection.  Ultimately
the creator of MCSection should canonicalize (e.g.) .text to whatever
the actual section is.

llvm-svn: 77803
2009-08-01 21:11:14 +00:00
Chris Lattner
04ae6629fe All MCSections are now required to have a SectionKind.
llvm-svn: 77787
2009-08-01 18:25:49 +00:00
Chris Lattner
48bdeff884 move emitUsedDirectiveFor to TargetLoweringObjectFile and rename it to
indicate that it is a predicate, not an emitter.  This eliminates TAI
dependencies on Mangler and GlobalValue.

llvm-svn: 77726
2009-07-31 20:52:39 +00:00
Chris Lattner
75b7692e66 switch off of 'Section' onto MCSection. We're not properly using
MCSection subclasses yet, but this is a step in the right direction.

llvm-svn: 77708
2009-07-31 18:48:30 +00:00
Chris Lattner
c156a00641 refactor section construction in TLOF to be through an explicit
initialize method, which can be called when an MCContext is available.

llvm-svn: 77687
2009-07-31 17:42:42 +00:00
Chris Lattner
85a3632c7a fix PR4650: we only track sizes for certain objects, so only put something
into the mergable section if it is one of our special cases.  This could
obviously be improved, but this is the minimal fix and restores us to the
previous behavior.

llvm-svn: 77679
2009-07-31 16:17:13 +00:00
Chris Lattner
12483f0bd7 mingw uses .data and .text, not _data and _text.
llvm-svn: 77435
2009-07-29 05:25:42 +00:00
Chris Lattner
f8a9c2f843 fix PR4584 with a trivial patch now that the pieces are in place.
llvm-svn: 77434
2009-07-29 05:20:33 +00:00
Chris Lattner
5c3e1e0d0c pass the mangler down into the various SectionForGlobal methods.
No functionality change.

llvm-svn: 77432
2009-07-29 05:09:30 +00:00