This broke in r144788 when the CodeGenOpt option was moved from everywhere else
(specifically, from addPassesToEmitFile) to createTargetMachine. Since
LTOCodeGenerator wasn't passing the 4th argument, when the 4th parameter became
the 3rd, it silently continued to compile (int->bool conversion) but meant
something completely different.

This change preserves the existing (accidental) and previous (default)
semantics of the addPassesToEmitFile and restores the previous/intended
CodeGenOpt argument by passing it appropriately to createTargetMachine.

(discovered by pending changes to -Wconversion to catch constant->bool
conversions)

llvm-svn: 157705

llvm-svn: 157704

It is better to address sub-registers directly by name instead of
relying on their position in the sub-register list.

llvm-svn: 157703

An empty list is not represented as a null pointer. Let TRI do its own
shortcuts.

llvm-svn: 157702

This also required making recursive simplifications until
nothing changes or a hard limit (currently 3) is hit.

With the simplification in place indvars can canonicalize
loops of the form
for (unsigned i = 0; i < a-b; ++i)
into
for (unsigned i = 0; i != a-b; ++i)
which used to fail because SCEV created a weird umax expr
for the backedge taken count.

llvm-svn: 157701

llvm-svn: 157700

it's pointed out that R11 can be used for magic things, and doing things just for 64-bit registers is silly.  Just optimize 3 more.

llvm-svn: 157699

integer registers.  This is already supported by the fastcc convention, but it doesn't
hurt to support it in the standard conventions as well.

In cases where we can cheat at the calling convention, this allows us to avoid returning
things through memory in more cases.

llvm-svn: 157698

and reported as PR12959. // rdar://11499742

llvm-svn: 157697

Patch by Jush Lu <jush.msn@gmail.com>.

llvm-svn: 157696

Also add subclasses MCSubRegIterator, MCSuperRegIterator, and
MCRegAliasIterator.

These iterators provide an abstract interface to the MCRegisterInfo
register lists so the internal representation can be changed without
changing all clients.

llvm-svn: 157695

Adds missing header guards to Refactoring.h.

llvm-svn: 157694

llvm-svn: 157693

instead of the first character of the value.

llvm-svn: 157692

llvm-svn: 157691

llvm-svn: 157690

The "llvm.codegen" intrinsic patch is a patch to LLVM, which is used
to generate code for embedded LLVM-IR strings. In Polly, we use it
to generate ptx assembly text for GPGPU code generation.

llvm-svn: 157689

llvm-svn: 157688

llvm-svn: 157687

supply a simple-minded testcase for r156813, to check whether the embedded montavista gcc toolchain is recognized

llvm-svn: 157686

llvm-svn: 157685

llvm-svn: 157684

llvm-svn: 157683

Clang docs update: list command-line flags that control the size of generated debug information. Reviewed by chandlerc@ and echristo@.

llvm-svn: 157681

SSE4A should not imply LZCNT and POPCNT. FMA4 should imply SSE4A. Add missing break at the end of btver1 feature list.

llvm-svn: 157680

llvm-svn: 157679

llvm-svn: 157678

llvm-svn: 157677

llvm-svn: 157676

llvm-svn: 157675

llvm-svn: 157674

If integer overflow causes one of the terms to reach zero, that can
force the entire expression to zero.

Fixes PR12929: cast<Ty>() argument of incompatible type

llvm-svn: 157673

No functionality.

llvm-svn: 157672

llvm-svn: 157669

setting breakpoints.  That's dangerous, since while we are setting a breakpoint,
the target might hit the dyld load notification, and start removing modules from
the list.  This change adds a GetMutex accessor to the ModuleList class, and
uses it whenever we are accessing the target's ModuleList (as returned by GetImages().)

<rdar://problem/11552372>

llvm-svn: 157668

llvm-svn: 157667

same value and were initialized with literals.  Clang will warn on code like
this:

enum A {
  FIRST = 1,
  SECOND = 1
};

llvm-svn: 157666

llvm-svn: 157664

llvm-svn: 157663

If-converter models predicated defs as read + write. The read should be marked as 'undef' since it may not already be live. This appeases -verify-machineinstrs.

llvm-svn: 157662