experimental pass that allocates locals relative to one another before
register allocation and then assigns them to actual stack slots as a block
later in PEI. This will eventually allow targets with limited index offset
range to allocate additional base registers (not just FP and SP) to
more efficiently reference locals, as well as handle situations where
locals cannot be referenced via SP or FP at all (dynamic stack realignment
together with variable sized objects, for example). It's currently
incomplete and almost certainly buggy. Work in progress.

Disabled by default and gated via the -enable-local-stack-alloc command
line option.

rdar://8277890

llvm-svn: 111059

had its address taken.

llvm-svn: 111058

This fixes another part of PR7792.

llvm-svn: 111057

LLDB_TESTSUITE_FORCE_FINISH and, if defined, kill the test suite.

llvm-svn: 111056

The earliestStart argument is entirely specific to linear scan allocation, and
can be easily calculated by RegAllocLinearScan.

Replace std::vector with SmallVector.

llvm-svn: 111055

cleaned up its API slightly.

llvm-svn: 111053

when the CXTranslationUnit_CacheCompletionResults option is given to
clang_parseTranslationUnit(). Essentially, we compute code-completion
results for macro definitions after we have parsed the file, then
store an ASTContext-agnostic version of those results (completion
string, cursor kind, priority, and active contexts) in the
ASTUnit. When performing code completion in that ASTUnit, we splice 
the macro definition results into the results provided by the actual
code-completion (which has had macros turned off) before libclang gets
those results. We use completion context information to only splice in
those results that make sense for that context.

With a completion involving all of the macros from Cocoa.h and a few other
system libraries (totally ~8500 macro definitions) living in a
precompiled header, we get about a 9% performance improvement from
code completion, since we no longer have to deserialize all of the
macro definitions from the precompiled header. 

Note that macro definitions are merely the canary; the cache is
designed to also support other top-level declarations, which should be
a bigger performance win. That optimization will be next.

Note also that there is no mechanism for determining when to throw
away the cache and recompute its contents.

llvm-svn: 111051

llvm-svn: 111050

Also cleaned up its API a tiny bit (but not the
extensive amount that is actually needed.  That's
still coming.)

llvm-svn: 111049

instruction opcode.  This fixes part of PR7792.

llvm-svn: 111047

when they are the same loop. Don't compare two instructions'
loop depths when they are in the same block.

llvm-svn: 111045

Not yet complete or used.

llvm-svn: 111044

When a live range is contained a single block, we can split it around
instruction clusters. The current approach is very primitive, splitting before
and after the largest gap between uses.

llvm-svn: 111043

ScalarEvolution::getAddExpr, which can be pretty expensive, when nothing
has changed, which is pretty common.

llvm-svn: 111042

llvm-svn: 111041

llvm-svn: 111040

rather than testing whether the loop contains the other's header.

llvm-svn: 111039

llvm-svn: 111038

the constant operand on the left, as that's where ScalarEvolution
will end up canonicalizing to.

llvm-svn: 111037

llvm-svn: 111036

llvm-svn: 111035

associated loop. This avoids potentially expensive traversals
of the add recurrence's operands.

llvm-svn: 111034

llvm-svn: 111033

Apparently, this is now fixed in Clang.

llvm-svn: 111032

since they can support trivial implementations. This avoids potentially
expensive traversals of the operands.

llvm-svn: 111031

same lines as the change I made for ARM saturate instructions.

llvm-svn: 111029

misanalysis and is undesirable.

llvm-svn: 111028

-static variables
-variables in anonymous namespace (fixes rdar://7794535)
-static data members in anonymous namespace
-static data members specializations in anonymous namespace

llvm-svn: 111027

-static function declarations
-functions in anonymous namespace
-class methods in anonymous namespace
-class method specializations in anonymous namespace
-function specializations in anonymous namespace

llvm-svn: 111026

Change Sema's UnusedStaticFuncs to UnusedFileScopedDecls to allow also keeping track of unused file scoped variables.

    This is only preparation, currently only static function definitions are tracked, as before.

llvm-svn: 111025

llvm-svn: 111024

(nonfragile-abi2), do not consider 'ivar' access
in class methods. Also, improve on diagnostics.
Radar 8304561.

llvm-svn: 111023

llvm-svn: 111022

llvm-svn: 111021

will apply all fixes even when there were other errors in the file.

llvm-svn: 111020

llvm-svn: 111019

llvm-svn: 111016

llvm-svn: 111013

instantiated with unique-external parameters.

llvm-svn: 111012

llvm-svn: 111011