llvm-svn: 91475

remove start/finishGVStub and the BufferState helper class from the
MachineCodeEmitter interface.  It has the side-effect of not setting the
indirect global writable and then executable on ARM, but that shouldn't be
necessary.

llvm-svn: 91464

found last time.  Instead of trying to modify the IR while iterating over it,
I've change it to keep a list of WeakVH references to dead instructions, and
then delete those instructions later.  I also added some special case code to
detect and handle the situation when both operands of a memcpy intrinsic are
referencing the same alloca.

llvm-svn: 91459

real data, not metadata) and fix DbgInfoPrinter to not abuse
GetConstantStringInfo.

llvm-svn: 91444

llvm-svn: 91440

llvm-svn: 91438

llvm-svn: 91434

llvm-svn: 91432

llvm-svn: 91428

isPodLike type trait.  This is a generally useful type trait for
more than just DenseMap, and we really care about whether something
acts like a pod, not whether it really is a pod.

llvm-svn: 91421

llvm-svn: 91417

llvm-svn: 91410

llvm-svn: 91405

1. Only perform (zext (shl (zext x), y)) -> (shl (zext x), y) when y is a constant. This makes sure it remove at least one zest.
2. If the shift is a left shift, make sure the original shift cannot shift out bits.

llvm-svn: 91399

clang enforces it.

llvm-svn: 91397

stuff isn't used just yet.

We want to model the GCC `-fno-schedule-insns' and `-fno-schedule-insns2'
flags. The hypothesis is that the people who use these flags know what they are
doing, and have hand-optimized the C code to reduce latencies and other
conflicts.

The idea behind our scheme to turn off scheduling is to create a map "on the
side" during DAG generation. It will order the nodes by how they appeared in the
code. This map is then used during scheduling to get the ordering.

llvm-svn: 91392

Tail duplication should zap a copy it inserted for SSA update if the copy is the only use of its source.

llvm-svn: 91390

llvm-svn: 91381

llvm-svn: 91380

llvm-svn: 91378

llvm-svn: 91377

$ svn merge -c -91161 https://llvm.org/svn/llvm-project/llvm/trunk
--- Reverse-merging r91161 into '.':
U    lib/CodeGen/BranchFolding.cpp
U    lib/CodeGen/MachineBasicBlock.cpp
$ svn merge -c -91113 https://llvm.org/svn/llvm-project/llvm/trunk
--- Reverse-merging r91113 into '.':
G    lib/CodeGen/MachineBasicBlock.cpp
$ svn merge -c -91101 https://llvm.org/svn/llvm-project/llvm/trunk
--- Reverse-merging r91101 into '.':
U    include/llvm/CodeGen/MachineBasicBlock.h
G    lib/CodeGen/MachineBasicBlock.cpp
$ svn merge -c -91092 https://llvm.org/svn/llvm-project/llvm/trunk
--- Reverse-merging r91092 into '.':
G    include/llvm/CodeGen/MachineBasicBlock.h
G    lib/CodeGen/MachineBasicBlock.cpp

llvm-svn: 91376

llvm-svn: 91371

llvm-svn: 91362

Bill for spotting this!

llvm-svn: 91355

between BR_JTr and STREXD.

llvm-svn: 91339

but we need it to actually be 4-bytes in the FDE.

llvm-svn: 91337

llvm-svn: 91333

llvm-svn: 91329

llvm-svn: 91327

llvm-svn: 91321

llvm-svn: 91319

Here's the diagnostic from clang:

/Volumes/Data/dgregor/Projects/llvm/lib/Target/CppBackend/CPPBackend.cpp:989:23: warning: 'gv' is always NULL in this context
        printConstant(gv);
                      ^
1 diagnostic generated.

llvm-svn: 91318

llvm-svn: 91316

llvm-svn: 91313

llvm-svn: 91310

llvm-svn: 91307

llvm-svn: 91305

IVUses list in releaseMemory().

llvm-svn: 91296

condition was inverted when the code was converted to contains().

llvm-svn: 91295