- Disables the freeing of the ASTContext and the TranslationUnit
   after parsing & sema.
 - Primarily for timing the impact on -fsyntax-only timings.

llvm-svn: 57643

llvm-svn: 57642

using the 'volatile' qualifier. This should not have any operational consequences
on code, because tags should always be stripped off (giving a non-volatile pointer)
before dereferencing. The new qualification is there to catch some attempts to use
tagged pointers in a context where an untagged pointer is appropriate.

Notably this approach does not catch dereferencing of tagged pointers, but helps
in separating the two concepts a bit.

llvm-svn: 57641

and
http://llvm.org/bugs/show_bug.cgi?id=2893

llvm-svn: 57640

llvm-svn: 57636

uninitialized in these functions with gcc-4.3.

llvm-svn: 57635

warning on x86-64 with gcc-4.3.

llvm-svn: 57634

llvm-svn: 57633

 - Implement fast path when value easily fits in a uint64.
 - ~6x faster, translates to 1-2% on Cocoa.h

llvm-svn: 57632

llvm-svn: 57631

x86 backend.  These will all be answered with "patches welcome", so
a PR doesn't help drive them along.

llvm-svn: 57630

llvm-svn: 57629

basically working, feel free to remove the tag.  The other targets have
really basic things that break them.

llvm-svn: 57628

new VisitLValue method is added to replace the old VisitLVal. The semantics
model becomes more explicit to separate rvalue evaluation from lvalue
evaluation.  

llvm-svn: 57627

llvm-svn: 57626

llvm-svn: 57625

floats.
 - With testcase, which also has some other things GCC folds but we
   don't commented out in it.

llvm-svn: 57624

is to encode the state of the #pragma pack stack as an attribute when
the structure is declared. 

 - Extend PackedAttr to take an alignment (in bits), and reuse for
   both __attribute__((packed)) (which takes no argument, instead
   packing tightly (to "minimize the memory required") and for #pragma
   pack (which allows specification of the maximum alignment in
   bytes). __attribute__((packed)) is just encoded as Alignment=1.

   This conflates two related but different mechanisms, but it didn't
   seem worth another attribute.

 - I have attempted to follow the MSVC semantics as opposed to the gcc
   ones, since if I understand correctly #pragma pack originated with
   MSVC. The semantics are generally equivalent except when the stack
   is altered during the definition of a structure; its not clear if
   anyone does this in practice. See testcase if curious.

llvm-svn: 57623

llvm-svn: 57622

llvm-svn: 57621

additional information in Loads, Stores, Calls, Invokes,
InsertValueInsts, and ExtractValueInsts.

llvm-svn: 57620

llvm-svn: 57619

llvm-svn: 57618

because it declares a std::vector<MachineMove>, and strict
concept checking requires the definition of MachineMove to be
available.

llvm-svn: 57617

copies of a value, and add several additional utilities to make
SmallVector better conform to the Container concept.

llvm-svn: 57616

passing in a function object.

llvm-svn: 57615

computation. A def of a register doesn't necessarily kill
live super-registers.

llvm-svn: 57614

llvm-svn: 57613

an unindexed load.

llvm-svn: 57612

Issue a warning when there's an ambiguous function declarator (that could be a direct initializer for a variable defition).
Idea originated from here: http://thread.gmane.org/gmane.comp.gcc.devel/101524

llvm-svn: 57609

to find opportunities for store-to-load forwarding or load CSE,
in the same way that visitStore scans back to do DSE. Also, define
a new helper function for testing whether the addresses of two
memory accesses are known to have the same value, and use it in
both visitStore and visitLoad.

These two changes allow instcombine to eliminate loads in code
produced by front-ends that frequently emit obviously redundant
addressing for memory references.

llvm-svn: 57608

llvm-svn: 57606

llvm-svn: 57605

llvm-svn: 57604

logging of actions.

llvm-svn: 57603

llvm-svn: 57599

typedef int f();
struct S {
   f *x; // incorrectly assuming this is function decl, leading to failed assertions.
};

llvm-svn: 57598

llvm-svn: 57597

llvm-svn: 57596

llvm-svn: 57595