- If destination is a physical register and it has a subreg index, use the
  sub-register instead.
This fixes PR5423.

llvm-svn: 88745

llvm-svn: 88742

llvm-svn: 88739

llvm-svn: 88738

llvm-svn: 88737

llvm-svn: 88734

When splitting an edge after a machine basic block with fall-through, we
forgot to insert a jump instruction. Fix this by calling updateTerminator() on
the fall-through block when relevant.

Also be more precise in PHIElimination::isLiveIn.

llvm-svn: 88728

llvm-svn: 88727

PreAllocSplitting is now using this API to insert code.

llvm-svn: 88725

llvm-svn: 88719

llvm-svn: 88716

got ghost linkage. It's better than aborting.

llvm-svn: 88715

so that isa<Instructon> doesn't return true for FixedStackPseudoSourceValue
values. This fixes a variety of problems, including crashes with -debug
and -print-machineinstrs. Also, add a comment to warn about this.

llvm-svn: 88711

emitFunctionStubAtAddr.

llvm-svn: 88708

The BasicBlock associated with a MachineBasicBlock does not necessarily
correspond to the code in the MBB.

Don't insert a new IR BasicBlock when splitting critical edges. We are not
supposed to modify the IR during codegen, and we should be able to do just
fine with a NULL BB.

llvm-svn: 88707

llvm-svn: 88706

llvm-svn: 88705

llvm-svn: 88704

llvm-svn: 88703

llvm-svn: 88700

Move DebugInfo checks into EmitComments and remove them from
target-specific AsmPrinters.  Not all comments need DebugInfo.

Re-enable the line numbers comment test.

llvm-svn: 88697

code-size win, and not when it's only likely to be code-size neutral,
such as when only a single instruction would be eliminated and a new
branch would be required.

This fixes rdar://7392894.

llvm-svn: 88692

D0<def,dead> = ...
...
             = S0<use, kill>
S0<def>      = ...
...
D0<def>      = 

The first D0 def is correctly marked dead, however, livevariables should have
added an implicit def of S0 or we end up with a use without a def.

llvm-svn: 88690

llvm-svn: 88682

because the testcase is triggering one more bug.

llvm-svn: 88674

llvm-svn: 88672

Remove duplicate APIs and state WRT spill objects.

llvm-svn: 87106

"a" + 0.

llvm-svn: 87084

llvm-svn: 87070

llvm-svn: 87069

Switch to smallvector. Also fix issue with using unsigend for MaxSplit.

llvm-svn: 87068

PPC is such a target; make it work.

llvm-svn: 87060

llvm-svn: 87059

llvm-svn: 87058

llvm-svn: 87056

llvm-svn: 87054

llvm-svn: 87049

Fix a bootstrap failure.

Provide special isLoadFromStackSlotPostFE and isStoreToStackSlotPostFE
interfaces to explicitly request checking for post-frame ptr elimination
operands.  This uses a heuristic so it isn't reliable for correctness.

llvm-svn: 87047

llvm-svn: 87042

llvm-svn: 87040