comment a bit.

llvm-svn: 70515

llvm-svn: 66790

llvm-svn: 66788

llvm-svn: 66400

and extern_weak_odr.  These are the same as the non-odr versions,
except that they indicate that the global will only be overridden
by an *equivalent* global.  In C, a function with weak linkage can
be overridden by a function which behaves completely differently.
This means that IP passes have to skip weak functions, since any
deductions made from the function definition might be wrong, since
the definition could be replaced by something completely different
at link time.   This is not allowed in C++, thanks to the ODR
(One-Definition-Rule): if a function is replaced by another at
link-time, then the new function must be the same as the original
function.  If a language knows that a function or other global can
only be overridden by an equivalent global, it can give it the
weak_odr linkage type, and the optimizers will understand that it
is alright to make deductions based on the function body.  The
code generators on the other hand map weak and weak_odr linkage
to the same thing.

llvm-svn: 66339

llvm-svn: 65631

llvm-svn: 65630

llvm-svn: 65629

This means that we have to include an additional header.

This patch should be functionally equivalent. I cannot outrule any performance
degradation, though I do not expect any.

llvm-svn: 61694

llvm-svn: 60880

llvm-svn: 60039

llvm-svn: 58900

llvm-svn: 57032

block specified by the InstList. Patch by Stefanus Du Toit.

llvm-svn: 56200

llvm-svn: 52699

llvm-svn: 52524

llvm-svn: 52461

llvm-svn: 52460

llvm-svn: 52360

llvm-svn: 51954

llvm-svn: 47187

llvm-svn: 45537

llvm-svn: 44526

llvm-svn: 42475

llvm-svn: 42324

(Not the most well written stuff in the universe :P)

llvm-svn: 42267

Add a new DenseMapInfo::isEqual method to allow clients to redefine
the equality predicate used when probing the hash table.

llvm-svn: 42042

llvm-svn: 37956

llvm-svn: 37676

llvm-svn: 37674

llvm-svn: 35506

llvm-svn: 35436

llvm-svn: 34826

APInt constructor.

llvm-svn: 34811

llvm-svn: 34340

Packed -> Vector

llvm-svn: 34296

Rename PackedType -> VectorType, ConstantPacked -> ConstantVector, and
PackedTyID -> VectorTyID. No functional changes.

llvm-svn: 34293

llvm-svn: 34095

llvm-svn: 34063

now that PR411 landed

llvm-svn: 33991