It's somewhat surprising anything works without this.  Before we would
compile the testcase into:

test:                                   # @test
	movl	$4, 8(%rdi)
	movl	8(%rdi), %eax
	orl	%esi, %eax
	cmpl	$32, %edx
	movl	%eax, -4(%rsp)          # 4-byte Spill
	je	.LBB0_2

now we produce:

test:                                   # @test
	movl	8(%rdi), %eax
	movl	$4, 8(%rdi)
	orl	%esi, %eax
	cmpl	$32, %edx
	movl	%eax, -4(%rsp)          # 4-byte Spill
	je	.LBB0_2
llvm-svn: 137303

llvm-svn: 137302

llvm-svn: 137301

llvm-svn: 137300

llvm-svn: 137299

llvm-svn: 137298

llvm-svn: 137297

infinite recursive calls in legalize. Fix PR10562

llvm-svn: 137296

could only get undefs and the vector shuffle becomes an undef,
generating wrong code.

llvm-svn: 137295

This is helping us track down some extra references to ModuleSP objects that
are causing things to get kept around for too long. 

Added a module pointer accessor to target and change a lot of code to use 
it where it would be more efficient.

"taret delete" can now specify "--clean=1" which will cleanup the global module
list for any orphaned module in the shared module cache which can save memory
and also help track down module reference leaks like we have now.

llvm-svn: 137294

hierarchy of delegation, and that EH selector values are meaningful
function-wide (good thing, too, or inlining wouldn't work).
2,3d
1a
hierarchy of delegation and that EH selector values have the same
meaning everywhere in the function instead of being meaningful only
in the context of a specific selector.

This removes the need for routing edges through EH cleanups,
since a cleanup simply always branches to its enclosing scope.

llvm-svn: 137293

Fix X86TargetLowering::LowerExternalSymbol so that it actually works in non-trivial cases.  This hasn't been an issue before because the function isn't normally called (but apparently is used to generate a tail-call to sin() on ELF x86-32 with PIC and SSE2).

Fixes PR9693.

llvm-svn: 137292

Add code to test case to create an evil linked list with:

    task_evil -> task_2 -> task_3 -> task_evil ...

and to check that the linked list iterator only iterates 3 times.

llvm-svn: 137291

llvm-svn: 137290

Change the SBValue.linked_list_iter() to treat the value object as a homogeneous linked list data structure
where an empty linked list is represented as a value object with a NULL value, instead of a special value
object which 'points' to NULL.

Also modifies the test case to comply.

rdar://problem/9933692

llvm-svn: 137289

llvm-svn: 137288

llvm-svn: 137287

llvm-svn: 137286

When a benchmarks test fails, the re-run command should include the '+b' option instead of the '-t' option.

llvm-svn: 137285

Cleanup: remove CleanedSate member and GetState() wrapper from StmtNodeBuilder, not needed as of r137273.

llvm-svn: 137284

llvm-svn: 137283

llvm-svn: 137282

llvm-svn: 137279

llvm-svn: 137277

An algorithm for incrementally updating LoopInfo within a
LoopPassManager. The incremental update should be extremely cheap in
most cases and can be used in places where it's not feasible to
regenerate the entire loop forest.

- "Unloop" is a node in the loop tree whose last backedge has been removed.
- Perform reverse dataflow on the block inside Unloop to propagate the
  nearest loop from the block's successors.
- For reducible CFG, each block in unloop is visited exactly
  once. This is because unloop no longer has a backedge and blocks
  within subloops don't change parents.
- Immediate subloops are summarized by the nearest loop reachable from
  their exits or exits within nested subloops.
- At completion the unloop blocks each have a new parent loop, and
  each immediate subloop has a new parent.

llvm-svn: 137276

llvm-svn: 137275

llvm-svn: 137274

Analyzer Core: In checkDeadSymbols checker callback, provide the state in which the symbols are not yet deleted so that checkers could inspect them. Since we are now always creating a transition in ProcessStmt(), remove the logic for adding a transition when none was generated. TODO: the extra transitions will have to be removed; more cleanups; a checker that tests teh new fucntionality.

llvm-svn: 137273

llvm-svn: 137272

llvm-svn: 137271

llvm-svn: 137270

llvm-svn: 137267

llvm-svn: 137265

llvm-svn: 137264

llvm-svn: 137263

llvm-svn: 137262

llvm-svn: 137261

llvm-svn: 137260

llvm-svn: 137259

llvm-svn: 137258