Clear the uniquing table when initializing TLOF to avoid a crash when the TLOF is reinitialized with a different MCContext.

llvm-svn: 79253

Update getSectionForConstant() to to allow mergable sections to be nulled out
if not supported by the ELF subtarget.

llvm-svn: 79249

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

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

Make these matching rules more strict so that they don't
accidentally match unrelated things.

llvm-svn: 78966

Remove HasCrazyBSS and add a flag in TAI to indicate that '.section'
must be emitted for PowerPC-Linux '.bss' section

llvm-svn: 78958

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.

ll

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

show more ...

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

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

reject invalid code like:
int x __attribute__((section("_foo, _bar"))) = 4;
int y __attribute__((section("_foo, _bar, 4byte_literals"))) = 1;

llvm-svn: 78867

implement support for uniquing MachO sections.

llvm-svn: 78866

reduce #includage

llvm-svn: 78860

Tidy #includes.

llvm-svn: 78677

split MachO section handling stuff out to its out .h/.cpp file.

llvm-svn: 78576

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 an

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

show more ...

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 SwitchToSectio

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

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make target-specific TLOF impls (except PIC16) create target-specific
MCSection instances.

llvm-svn: 78500

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 seman

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

show more ...

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

sink getOrCreateSection down into all the object file implementations,
now that they create *all* the sections.

llvm-svn: 78494

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 c

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

show more ...

expose SectionKindForGlobal to curious clients, named as
getKindForGlobal.

llvm-svn: 78156

enhance codegen to put 16-bit character strings into the
__TEXT,__ustring section on darwin.

llvm-svn: 78068

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

Add support emiting for 2/4 byte mergable strings to the ".rodata.str*"
section on ELF targets.

llvm-svn: 78066