MCAsmStreamer.  Based on this, eliminate the current section from AsmPrinter.

While I'm at it, clean up the last of the horrible "switch to null section" stuff
and add an assert.  This change is in preparation for completely eliminating 
asmprinter::switchtosection.

llvm-svn: 79324

just remove the argument and replace it with 1.

llvm-svn: 79246

doing it directly.  This requires const'izing a bunch of stuff that
took sections, but this seems like the right semantic thing to do:
emitting a label to a section shouldn't mutate the MCSection object
itself, for example.

llvm-svn: 79227

llvm-svn: 79222

to print one instruction.

llvm-svn: 78985

llvm-svn: 78948

PrintUnmangledNameSafely.

llvm-svn: 78878

llvm-svn: 78838

the basic block label printing to check whether a block has a name
before printing a comment character and whitespace for it.

llvm-svn: 78830

that emitted unnecessary whitespace outside of VerboseAsm mode.

llvm-svn: 78828

"inlineasmstart/end" strings so that the contents of the directive
are separate from the comment character.  This lets elf targets
get #APP/#NOAPP for free even if they don't use "#" as the comment
character.  This also allows hoisting the darwin stuff up to the
shared TAI class.

llvm-svn: 78737

the code based on this and make it fall through better.

llvm-svn: 78708

Add support for printing loop structure information in asm comments.
This definitely slows down asm output so put it under an -asm-exuberant
flag.

This information is useful when doing static analysis of performance
issues.

llvm-svn: 78567

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

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

llvm-svn: 78432

llvm-svn: 78428

llvm-svn: 78416

Fix some column padding bugs, reorganize things as suggested by Chris
and eliminate complexity.  Yay!

llvm-svn: 78243

llvm-svn: 78242

llvm-svn: 78154

the masm backend.  If anyone cares about masm in the future,
we'll have semantic sections it can hang off of.

llvm-svn: 78096

eliminate IsInTextSection.

llvm-svn: 78017

llvm-svn: 78015

llvm-svn: 77984

llvm-svn: 77976

TAI.

llvm-svn: 77842

llvm-svn: 77834

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

llvm-svn: 77821

to:

.quad X

even on a 32-bit system, where X is not 64-bits.  There isn't much that
we can do here, so we just print:

.quad	((X) & 4294967295)

instead.

llvm-svn: 77818

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

llvm-svn: 77754

Simplify operand padding by keying off tabs in the asm stream.  If
padding is disabled, tabs get replaced by spaces except in the case of
the first operand, where the tab is output to line up the operands after
the mnemonics.

Add some better comments and eliminate redundant code.

Fix some testcases to not assume tabs.

llvm-svn: 77740

indicate that it is a predicate, not an emitter.  This eliminates TAI
dependencies on Mangler and GlobalValue.

llvm-svn: 77726

MCSection subclasses yet, but this is a step in the right direction.

llvm-svn: 77708

initialize method, which can be called when an MCContext is available.

llvm-svn: 77687

No functionality change.

llvm-svn: 77432

it is highly specific to the object file that will be generated in the end,
this introduces a new TargetLoweringObjectFile interface that is implemented
for each of ELF/MachO/COFF/Alpha/PIC16 and XCore.

Though still is still a brutal and ugly refactoring, this is a major step
towards goodness.

This patch also:
1. fixes a bunch of dangling pointer problems in the PIC16 backend.
2. disables the TargetLowering copy ctor which PIC16 was accidentally using.
3. gets us closer to xcore having its own crazy target section flags and
   pic16 not having to shadow sections with its own objects.
4. fixes wierdness where ELF targets would set CStringSection but not
   CStringSection_.  Factor the code better.
5. fixes some bugs in string lowering on ELF targets.

llvm-svn: 77294

MCSections soon instead of Section for all targets, and we need something to
own them.

llvm-svn: 77252