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

llvm-svn: 57594

llvm-svn: 57593

llvm-svn: 57592

This fixes <rdar://problem/6289007> clang block rewriter: ^ in cast is not rewritten.

llvm-svn: 57591

llvm-svn: 57590

This fixes PR2894.

llvm-svn: 57589

Also added serialization support to OverloadExpr.

llvm-svn: 57588

llvm-svn: 57587

llvm-svn: 57586

with the build directory different from the source directory.

llvm-svn: 57583

llvm-svn: 57582

llvm-svn: 57579

llvm-svn: 57578