llvm-svn: 93818

comments (fast isel, X86).  This doesn't seem
to break any functionality, but will introduce
cases where -g affects the generated code.  I'll
be fixing that.

llvm-svn: 93811

Instcombine does this but apparently there are situations where this pattern will escape the optimizer and / or created by isel. Here is a case that's seen in JavaScriptCore:
  %t1 = sub i32 0, %a
  %t2 = add i32 %t1, -1
The dag combiner pattern: ((c1-A)+c2) -> (c1+c2)-A
will fold it to -1 - %a.

llvm-svn: 93773

  idea, but unfortunately necessary.
- Default to using 4-bytes for the LSDA pointer encoding to agree with the
  encoded value in the CIE.

llvm-svn: 93753

llvm-svn: 93699

remove it and change all the code that prints MCSymbols to use 
<< instead, which is much simpler and cleaner.

llvm-svn: 93695

having to pass various fields from it in.  Simplify.

llvm-svn: 93686

llvm-svn: 93680

Add a note for the macho streamer and remove a used of the mangler from the soon to be defunct machowriter pass.

llvm-svn: 93670

When checking for sret-demotion, it needs to use legal types.  When using the return value of an sret-demoted call, it needs to use possibly illegal types that match the declared Type of the callee.

llvm-svn: 93667

llvm-svn: 93664

llvm-svn: 93656

llvm-svn: 93654

Mangler::getMangledName is used from lto
Mangler::setUseQuotes is used in the AsmPrinter
Mangler::setSymbolsCanStartWithDigit is used in the AsmPrinter

llvm-svn: 93652

Mangler::getMangledName is now dead, remove it and all the other stuff in Mangler that is now transitively dead.  woo.

llvm-svn: 93648

llvm-svn: 93647

and add an explicit ForcePrivate argument.

Switch FunctionEHFrameInfo to be MCSymbol based instead of string based.

llvm-svn: 93646

dwarf emission which is going to be more invasive.

llvm-svn: 93645

No need to use WeakVH here.

llvm-svn: 93631

llvm-svn: 93630

llvm-svn: 93627

The CIE says that the LSDA point in the FDE section is an "sdata4". That's fine,
but we need it to actually be 4-bytes in the FDE for some platforms. Allow
individual platforms to decide for themselves.

llvm-svn: 93616

llvm-svn: 93614

llvm-svn: 93612

llvm-svn: 93609

not during the later post-alloc tail duplication.

llvm-svn: 93600

the -pre-regalloc-taildup command-line option, and add a new
-disable-early-taildup option.

llvm-svn: 93597

replace it.  Upgrade Alpha, Blackfin, and part of CellSPU to not
use mangler anymore.  CellSPU needs more invasive surgery.

llvm-svn: 93589

llvm-svn: 93587

llvm-svn: 93577

helper method, use it to simplify some code.

llvm-svn: 93575

llvm-svn: 93571

llvm-svn: 93562

This fixes the regression for -pre-regalloc-taildup in
MultiSource/Applications/lambda-0.1.3.

llvm-svn: 93541

llvm-svn: 93540

Add some debug routines to SelectionDAG to dump full DAGs.
print/dumpWithDepth allows one to dump a DAG up to N levels deep.
dump/printWithFullDepth prints the whole DAG, subject to a depth limit
on 100 in the default case (to prevent infinite recursion).

Have CannotYetSelect to a dumpWithFullDepth so it is clearer exactly
what the non-matching DAG looks like.

llvm-svn: 93538

Improve llvm.dbg.declare intrinsic by referring directly to the storage in its first argument, via function-local metadata (instead of via a bitcast).
This patch also cleans up code that expects there to be a bitcast in the first argument and testcases that call llvm.dbg.declare.
It also strips old llvm.dbg.declare intrinsics that did not pass metadata as the first argument.

llvm-svn: 93531

Remove most of old Mach-O Writer support, it has been replaced by MCMachOStreamer

Further refactoring to completely remove MachOWriter and drive the object file
writer with the AsmPrinter MCInst/MCSection logic is forthcoming.

llvm-svn: 93527

llvm-svn: 93515

The pre-regalloc pass caused some regressions in both compile time and
performance of the generated code, and it did not improve performance, except
for indirect branches.  I also moved the check for single-block loops to speed
up the common case when running the taildup pass before reg allocation.

llvm-svn: 93505