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

Eliminate textual section switching from the x86 backend, one
more step towards "semantics sections"

llvm-svn: 78002

move dwarf debug info section selection stuff from TAI to
TLOF, unifying all the dwarf targets at the same time.

llvm-svn: 77889

convert EHFrameSection to be managed by TLOF instead of TAI.

llvm-svn: 77888

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. W

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

show more ...

convert ctors/dtors section to be in TLOF instead of
TAI.

llvm-svn: 77842

(re)introduce new simpler apis for creation sectionkinds.

llvm-svn: 77834

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 f

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

show more ...

fix a fixme by sinking various target-specific directives down into
the appropriate subclasses.

llvm-svn: 77815

coff also doesn't have a ReadOnlySection yet, (!)

llvm-svn: 77814

coff doesn't set a .bss seciton, so this is dead.

llvm-svn: 77813

it turns out that isWeak() was basically dead anyway. Kill off SectionInfo :-/

llvm-svn: 77812

don't use isWeak anymore.

llvm-svn: 77810

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

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

show more ...

All MCSections are now required to have a SectionKind.

llvm-svn: 77787

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

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

refactor section construction in TLOF to be through an explicit
initialize method, which can be called when an MCContext is available.

llvm-svn: 77687

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

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

show more ...

mingw uses .data and .text, not _data and _text.

llvm-svn: 77435

fix PR4584 with a trivial patch now that the pieces are in place.

llvm-svn: 77434

pass the mangler down into the various SectionForGlobal methods.
No functionality change.

llvm-svn: 77432

constant prop a utostr.

llvm-svn: 77430

remove some completely wrong code. 1 is never < 16. It turns out that GCC appears to put strings of any length into the ELF cstring equivalent, so just rip out the code.

llvm-svn: 77429

Fix PR4639, a ELF-TLS regression from some of my refactoring.

llvm-svn: 77336