Use the schedule itinerary operand use/def cycle information to adjust dependence edge latency for post-RA scheduling.

llvm-svn: 79425

llvm-svn: 79415

llvm-svn: 79406

talk to the MCStreamer directly instead.

llvm-svn: 79405

llvm-svn: 79397

just falling through the end.

llvm-svn: 79383

SRA_PARTS, as is done for SRL, SHL, and SRA.

llvm-svn: 79380

llvm-svn: 79378

- Drop the Candidates argument and fix all callers. Now that RegScavenger
  tracks available registers accurately, there is no need to restict the
  search.
- Make sure that no aliases of the found register are in use. This was a potential bug.

llvm-svn: 79369

Make various changes suggested by Chris.

llvm-svn: 79358

llvm-svn: 79346

remove RemoveDuplicateSuccessor, as it is no longer necessary, and because
it breaks assumptions made in
MachineBasicBlock::isOnlyReachableByFallthrough.

Convert test/CodeGen/X86/omit-label.ll to FileCheck and add a testcase
for PR4732.

test/CodeGen/Thumb2/thumb2-ifcvt2.ll sees a diff with this commit due to
it being bugpoint-reduced to the point where it doesn't matter what the
condition for the branch is.

Add some more interesting code to
test/CodeGen/X86/2009-08-06-branchfolder-crash.ll, which is the testcase
that originally motivated the RemoveDuplicateSuccessor code, to help
verify that the original problem isn't being re-broken.

llvm-svn: 79338

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

an EHFrame section, so we just emit ehframe data into a random section.

This is clearly bad.

llvm-svn: 79323

llvm-svn: 79313

llvm-svn: 79312

be able to understand ;-)

llvm-svn: 79311

llvm-svn: 79287

llvm-svn: 79272

llvm-svn: 79264

llvm-svn: 79262

more properly belong. This allows removing the front-end conditionalized
SJLJ code, and cleans up the generated IR considerably. All of the
infrastructure code (calling _Unwind_SjLj_Register/Unregister, etc) is
added by the SjLjEHPrepare pass.

llvm-svn: 79250

Extend the instruction itinerary model to include the ability to indicate the def and use cycle for each operand. This additional information is optional, so existing itineraries do not need to be changed.

llvm-svn: 79247

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

llvm-svn: 79195

Remove unused methods and make others private.

llvm-svn: 79194

If two uses of a CopyFromReg want different regclasses, first try a common
sub-class, then fall back on the copy emitted in AddRegisterOperand. There is
no need for an assert here. The cross-class joiner usually cleans up nicely.

llvm-svn: 79193

llvm-svn: 79150

llvm-svn: 79146

llvm-svn: 79133

It is legal for an inline asm operand to use an earlyclobber register if the
use operand is tied to the earlyclobber operand. The issue is discussed here:

  http://gcc.gnu.org/ml/gcc/1999-04n/msg00431.html

We should perhaps let only the machine code verifier worry about these finer
details. EarlyClobber operands are not really interesting to the scavenger.

This fixes PR4528 for the third time.

llvm-svn: 79122

In a naked function, the flag is never set and getPristineRegs() returns an
empty list. That means naked functions are able to clobber callee saved
registers, but that is the whole point of naked functions.

This fixes PR4716.

llvm-svn: 79096

llvm-svn: 79095

In the included test case, a stack load was not included in DistanceMap. That
caused TransferDeadness to ignore the instruction, leading to a scavenger
assert.

llvm-svn: 79090

llvm-svn: 79087

llvm-svn: 79068

llvm-svn: 79044

libcall. Take advantage of this in the ARM backend to rectify broken
choice of CC when hard float is in effect. PIC16 may want to see if
it could be of use in MakePIC16Libcall, which works unchanged.

Patch by Sandeep!

llvm-svn: 79033