The iplist::clear() function can be quite expensive because it traverses
the entire list, calling deleteNode() and removeNodeFromList() on each
element. If node destruction and deallocation can be handled some other
way, clearAndLeakNodesUnsafely() can be used to jettison all nodes
without bringing them into cache.

The function name is meant to be ominous.

llvm-svn: 171540

The R600 target has test cases that exercises this code.

llvm-svn: 171538

Since subtraction does not commute the loop vectorizer incorrectly vectorizes
reductions such as x = A[i] - x.

Disabling for now.

llvm-svn: 171537

types and a FIXME for what we should be doing. Should solve the
immediacy of PR12069 where our debug info is crashing another
tool.

llvm-svn: 171536

llvm-svn: 171535

Fixed up some DEBUG messages where I was putting in the text of a message the method where it was being called when I should have just prefixed the actual message with Pass::Method.

Additionally I fixed some whitespace issues.

llvm-svn: 171534

llvm-svn: 171533

Thanks for dgregor for noticing it.

llvm-svn: 171532

llvm-svn: 171531

llvm-svn: 171530

llvm-svn: 171529

llvm-svn: 171528

llvm-svn: 171526

llvm-svn: 171525

returns early then it is slightly faster to execute a sequence of NOP
instructions to wait until the return address is ready,
as opposed to simply stalling on the ret instruction
until the return address is ready.

When compiling for X86 Atom only, this patch will run a pass, called
"X86PadShortFunction" which will add NOP instructions where less than four
cycles elapse between function entry and return.

It includes tests.

Patch by Andy Zhang.

llvm-svn: 171524

* Remove dead methods.
* Use the 'operator==' method instead of 'contains', which isn't needed.
* Fix some comments.

No functionality change.

llvm-svn: 171523

Before: InvalidRegions[ &R] = 0;
After:  InvalidRegions[&R] = 0;

This fixes llvm.org/PR14793

llvm-svn: 171522

llvm-svn: 171521

[Object][ELF] Add a maximum alignment. This is used by createELFObjectFile to create a properly aligned reader.

llvm-svn: 171520

This fixes a regression from 168895.

llvm-svn: 171519

vectors are being compared.

llvm-svn: 171517

llvm-svn: 171516

llvm-svn: 171515

Update test case to verify flow sequence is
written as a flow sequence.

llvm-svn: 171514

shift_rotate_imm64.

llvm-svn: 171513

reachablity.

We conservatively approximate the reachability analysis by saying it is not
reachable if there is a single path starting from "From" and the path does not
reach "To".

rdar://12801584

llvm-svn: 171512

llvm-svn: 171511

llvm-svn: 171510

llvm-svn: 171509

llvm-svn: 171508

llvm-svn: 171507

This patch fixes the PPC eh_frame definitions for the personality and 
frame unwinding for PIC objects. It makes PIC build correctly creates
relative relocations in the '.rela.eh_frame' segments and thus avoiding
a text relocation that generates a DT_TEXTREL segments in link phase.

llvm-svn: 171506

llvm-svn: 171505

Add __has_feature support to detect if clang supports the explicit "atomic" keyword for ObjC properties.

Fixes <rdar://problem/12953378>.

llvm-svn: 171504

Addresses LLVM PR 11661.

llvm-svn: 171503

NSErrorChecker: remove quoting the parameter name in the diagnostic until we actually include it's name.

This is a possible regression of moving to using ImplicitNullDerefEvent.
Fixing this for real (including the parameter name) requires more
plumbing in ImplicitNullDerefEvent.  This is just a stop gap fix.

llvm-svn: 171502

llvm-svn: 171501

llvm-svn: 171500

llvm-svn: 171499

llvm-svn: 171498