llvm-svn: 52431

llvm-svn: 52430

llvm-svn: 52429

llvm-svn: 52426

llvm-svn: 52425

such as those created by clone(), to a basic block.

llvm-svn: 52424

llvm-svn: 52423

Patch by David Chisnall!

llvm-svn: 52422

It's not safe to remove SUBREG_TO_REG that looks like identity copies, e.g. movl %eax, %eax on x86-64 actually does a zero-extend.

llvm-svn: 52421

llvm-svn: 52420

llvm-svn: 52419

Patch by Gary Benson!

llvm-svn: 52418

Patch by Filipe Cabecinhas

llvm-svn: 52417

llvm-svn: 52415

llvm-svn: 52414

Spotted by Nick Lewycky.

llvm-svn: 52411

rather than bundling them together.  Rename FloatToInt
to PromoteFloat (better, if not perfect).  Reorganize
files by types rather than by operations.

llvm-svn: 52408

llvm-svn: 52403

llvm-svn: 52402

llvm-svn: 52401

llvm-svn: 52400

llvm-svn: 52399

llvm-svn: 52398

speaking these are not constant values. However, when a function always returns
one of its arguments, then from the point of view of each caller the return
value is constant (or at least a known value) and can be replaced.

llvm-svn: 52397

individually.

Also learn IPConstProp how returning first class aggregates work, in addition
to old style multiple return instructions.

Modify the return-constants testscase to confirm this behaviour.

llvm-svn: 52396

llvm-svn: 52391

properly.

llvm-svn: 52390

llvm-svn: 52389

llvm-svn: 52388

llvm-svn: 52387

Split static analysis page into two pages: a high-level information page (with quick download links) and a usage page.

llvm-svn: 52386

Color <h3> light blue, <h2> a dark grey.

llvm-svn: 52385

llvm-svn: 52384

of value info (sign/zero ext info) from one MBB to another.  This doesn't
handle much right now because of two limitations:

1) only handles zext/sext, not random bit propagation (no assert exists 
   for this)
2) doesn't handle phis.

llvm-svn: 52383

which made it work.

llvm-svn: 52382

llvm-svn: 52381

Fix indentation of class declarations in ExprCXX.h

llvm-svn: 52380

llvm-svn: 52379

clang as a Release build.

The big change is that all AST nodes (subclasses of Stmt) whose children are
Expr* store their children as Stmt* or arrays of Stmt*. This is to remove
strict-aliasing warnings when using StmtIterator. None of the interfaces of any
of the classes have changed (except those with arg_iterators, see below), as the
accessor methods introduce the needed casts (via cast<>). While this extra
casting may seem cumbersome, it actually adds some important sanity checks
throughout the codebase, as clients using StmtIterator can potentially overwrite
children that are expected to be Expr* with Stmt* (that aren't Expr*). The casts
provide extra sanity checks that are operational in debug builds to catch
invariant violations such as these.

For classes that have arg_iterators (e.g., CallExpr), the definition of
arg_iterator has been replaced. Instead of it being Expr**, it is an actual
class (called ExprIterator) that wraps a Stmt**, and provides the necessary
operators for iteration. The nice thing about this class is that it also uses
cast<> to type-checking, which introduces extra sanity checks throughout the
codebase that are useful for debugging.

A few of the CodeGen functions that use arg_iterator (especially from
OverloadExpr) have been modified to take begin and end iterators instead of a
base Expr** and the number of arguments. This matches more with the abstraction
of iteration. This still needs to be cleaned up a little bit, as clients expect
that ExprIterator is a RandomAccessIterator (which we may or may not wish to
allow for efficiency of representation).

This is a fairly large patch. It passes the tests (except CodeGen/bitfield.c,
which was already broken) on both a Debug and Release build, but it should
obviously be reviewed.

llvm-svn: 52378

Rather than avoiding to wrap ISD::DECLARE GV operand in X86ISD::Wrapper, simply handle it at dagisel time with x86 specific isel code.

llvm-svn: 52377