works on unstructured CFGs.  This implements PR217, our oldest open PR.

llvm-svn: 83705

a Value* to a WeakVH was constructing a temporary WeakVH
(due to the implicit assignment operator).  This avoids
that cost.

llvm-svn: 83704

llvm-svn: 83703

Use, to complement the version that takes a use_iterator.

llvm-svn: 83702

llvm-svn: 83701

Split the various ambiguous result enumerators into their own enum.  Tests
for most of C++ [namespace.qual].

llvm-svn: 83700

into MachineInstrs. This is mostly just moving the code from
ScheduleDAGSDNodesEmit.cpp into a new class. This decouples MachineInstr
emitting from scheduling.

llvm-svn: 83699

since it won't do any folding. This will help avoid some inconvenient
casting.

llvm-svn: 83698

llvm-svn: 83697

MachineInstr::isInvariantLoad instead, which has the benefit of being
more complete.

llvm-svn: 83696

llvm-svn: 83695

llvm-svn: 83694

llvm-svn: 83693

Add CheckCallReturnType and start using it for regular call expressions. This will improve error messages. For 

struct B;

B f();

void g() {
f();
}

We now get

t.cpp:6:3: error: calling 'f' with incomplete return type 'struct B'
  f();
  ^~~
t.cpp:3:3: note: 'f' declared here
B f();
  ^
t.cpp:1:8: note: forward declaration of 'struct B'
struct B;
       ^

llvm-svn: 83692

it isn't needed in the ScheduleDAGSDNodes schedulers.

llvm-svn: 83691

fewer remat.

llvm-svn: 83690

when loading from an invariant memory location.

llvm-svn: 83688

is trivially rematerializable and integrate it into
TargetInstrInfo::isTriviallyReMaterializable. This way, all places that
need to know whether an instruction is rematerializable will get the
same answer.

This enables the useful parts of the aggressive-remat option by
default -- using AliasAnalysis to determine whether a memory location
is invariant, and removes the questionable parts -- rematting operations
with virtual register inputs that may not be live everywhere.

llvm-svn: 83687

llvm-svn: 83686

llvm-svn: 83685

Extract scope information from the variable itself, instead of relying on alloca or llvm.dbg.declare location.

While recording beginning of a function, use scope info from the first location entry instead of just relying on first location entry itself.

llvm-svn: 83684

llvm-svn: 83681

  - Filter out unnamed declarations
  - Filter out declarations whose names are reserved for the
  implementation (e.g., __bar, _Foo) 
  - Place OVERLOAD: or COMPLETION: at the beginning of each
  code-completion result, so we can easily separate them from other
  compilation results.

llvm-svn: 83680

llvm-svn: 83679

mappings, which could cause errors and assert-failures.  This patch fixes that,
adds a test, and refactors the global-mapping-removal code into a single place.

llvm-svn: 83678

llvm-svn: 83677

llvm-svn: 83676

constants used in inlining heuristics (especially
those used in more than one file).  No functional change.

llvm-svn: 83675

pass a LookupResult reference to lookup routines.  Call out uses which assume a single
result.

llvm-svn: 83674

lists.  Changed ARMAsmParser::MatchRegisterName to return -1 instead of 0 on
errors so 0-15 values could be returned as register numbers.  Also added the
rest of the arm register names to the currently hacked up version to allow more
testing.  Some changes to ARMAsmParser::ParseOperand to give different errors
for things not yet supported and some additions to the hacked
ARMAsmParser::MatchInstruction to allow more testing for now.

llvm-svn: 83673

injected-class-name (e.g., when we're referring to other
specializations of the current class template). Make sure that we see
the template rather than the injected-class-name. Fixes PR4768.

llvm-svn: 83672

TargetInstrDesc::isRematerializable flag, so it isn't necessary to do
this check in its callers.

llvm-svn: 83671

when one of the bits being tested would end up being the sign bit in the
narrower type, and a signed comparison is being performed, since this would
change the result of the signed comparison. This fixes PR5132.

llvm-svn: 83670

llvm-svn: 83667

llvm-svn: 83666

llvm-svn: 83665

llvm-svn: 83664

llvm-svn: 83663

llvm-svn: 83659

information when unfolding memory references.

llvm-svn: 83656