Tail duplication produces lots of identical phi nodes in different basic
blocks. Teach PHIElimination to reuse the join registers when lowering a phi
node that is identical to an already lowered node. This saves virtual
registers, and more importantly it avoids creating copies the the coalescer
doesn't know how to eliminate.

Teach LiveIntervalAnalysis about the phi joins with multiple uses.

This patch significantly reduces code size produced by -pre-regalloc-taildup.

llvm-svn: 91549

with a non-trivial default constructor, zero-initialize the storage
and then call the default constructor. Fixes PR5800.

llvm-svn: 91548

llvm-svn: 91547

instead of crashing for now. 

llvm-svn: 91546

llvm-svn: 91545

llvm-svn: 91544

implement PR5654: add -fassume-sane-operator-new, which is enabled by default, and adds the malloc attribute to the global function new() and to the overloaded new operators.

feel free to chage the name to this lengthy argument

llvm-svn: 91543

llvm-svn: 91542

llvm-svn: 91541

llvm-svn: 91540

llvm-svn: 91539

function in a C++ call using an arbitrary call-expression type.
Actually exploit this to fix the recovery implemented earlier.

The diagnostic is still iffy, though.

llvm-svn: 91538

llvm-svn: 91537

llvm-svn: 91536

attribute: the object type. 
Add initial support for visiting CXXThisExpr.
Fix a bunch of 80-col violations.

llvm-svn: 91535

problem", this broke llvm-gcc bootstrap for release builds on
x86_64-apple-darwin10.

This reverts commit db22309800b224a9f5f51baf76071d7a93ce59c9.

llvm-svn: 91534

this", this broke llvm-gcc bootstrap for release builds on
x86_64-apple-darwin10.

llvm-svn: 91533

miscompile (i386.o miscompares) but it happens both with and without
this patch.

llvm-svn: 91532

llvm-svn: 91531

llvm-svn: 91530

SmallVectorBase::grow_pod out of line, finally satisfying PR3758.

llvm-svn: 91529

is not used by anything performance sensitive, so just use std::string.

llvm-svn: 91528

a fixed size buffer is perfectly fine.

llvm-svn: 91527

common function.  It is still an inline method, which will be fixed next.

llvm-svn: 91526

used as expressions).  In dependent contexts, try to recover by doing a lookup
in previously-dependent base classes.  We get better diagnostics out, but    
unfortunately the recovery fails:  we need to turn it into a method call  
expression, not a bare call expression.  Thus this is still a WIP.

llvm-svn: 91525

llvm-svn: 91524

SmallVectorTemplateBase class, which allows us to statically
dispatch on isPodLike instead of dynamically.

llvm-svn: 91523

down into SmallVectorImpl.  This requires sprinking a ton of this->'s in,
but gives us a place to factor.

llvm-svn: 91522

llvm-svn: 91521

Use GetAddrOfRTTI everywhere and remove GenerateRTTI and GenerateRTTIRef. With this change, we can now compile and link TableGen.

llvm-svn: 91520

llvm-svn: 91519

and there is a new SmallVectorTemplateBase class in between it and SmallVectorImpl.
SmallVectorTemplateBase can be specialized based on isPodLike.

llvm-svn: 91518

llvm-svn: 91517

InitializationSequence to perform the actual initialization.

Also, introduced the notion of a tree of initialized entities, so that
we can know where an initialization began when dealing with nested
initializations (as occur when performing list initialization). This
will, eventually, be useful for producing better diagnostics when list
initialization fails, because we can show the path from the top-level
object being initialized down to the actual subobject where
initialization failed.

llvm-svn: 91516

declarations of abort(), and two, we mark it noreturn.  Missing the latter
shows up in one of the "embarassing" tests (from the thread on llvmdev
"detailed comparison of generated code size for LLVM and other compilers").

llvm-svn: 91515

llvm-svn: 91514

llvm-svn: 91513

Teach RetainSummaryManager::getSummary(FunctionDecl* FD) that 'FD->getIdentifier()' will not always return a non-null IdentifierInfo*.

llvm-svn: 91512

llvm-svn: 91511

Teach NoReturnFunctionChecker that FunctionDecl::getIdentifier() is not guaranteed to return a non-null IdentifierInfo*.

llvm-svn: 91510