llvm-svn: 88742

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

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

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

"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

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

llvm-svn: 87036

llvm-svn: 87035

Do some cleanups suggested by Chris.

llvm-svn: 87034

Set the ReloadReuse AsmPrinter flag where appropriate.

llvm-svn: 87030

Make the MachineFunction argument of getFrameRegister const.

This also fixes a build error.

llvm-svn: 87027

Add hasLoadFromStackSlot and hasStoreToStackSlot to return whether a
machine instruction loads or stores from/to a stack slot.  Unlike
isLoadFromStackSlot and isStoreFromStackSlot, the instruction may be
something other than a pure load/store (e.g. it may be an arithmetic
operation with a memory operand).  This helps AsmPrinter determine when
to print a spill/reload comment.

This is only a hint since we may not be able to figure this out in all
cases.  As such, it should not be relied upon for correctness.

Implement for X86.  Return false by default for other architectures.

llvm-svn: 87026

llvm-svn: 87024