The JITResolver maps Functions to their canonical stubs and all callsites for
lazily-compiled functions to their target Functions. To make Function
destruction work, I'm going to need to remove all callsites on destruction, so
this patch also adds the reverse mapping for that.

There was an incorrect assumption in here that the only stub for a function
would be the one caused by needing to lazily compile it, while x86-64 far calls
and dlsym-stubs could also cause such stubs, but I didn't look for a test case
that the assumption broke.

This also adds DenseMapInfo<AssertingVH> so I can use DenseMaps instead of
std::maps.

llvm-svn: 84522

llvm-svn: 84521

llvm-svn: 84520

llvm-svn: 84519

llvm-svn: 84516

llvm-svn: 84513

llvm-svn: 84512

llvm-svn: 84510

llvm-svn: 84509

llvm-svn: 84508

llvm-svn: 84506

where a loop's header is being split and it has predecessors which are not
contained by the most-nested loop which contains the loop.
This fixes PR5235.

llvm-svn: 84505

llvm-svn: 84504

llvm-svn: 84503

to name basic blocks "bb" instead of "BB", for consistency.

llvm-svn: 84502

LLC was scheduling compares before the adds causing wrong branches to be taken
in programs, resulting in misoptimized code wherever atomic adds where used.

llvm-svn: 84485

llvm-svn: 84471

llvm-svn: 84465

llvm-svn: 84463

llvm-svn: 84459

llvm-svn: 84432

llvm-svn: 84431

llvm-svn: 84425

stack slots and giving them different PseudoSourceValue's did not fix the
problem of post-alloc scheduling miscompiling llvm itself.
- Apply Dan's conservative workaround by assuming any non fixed stack slots can
alias other memory locations. This means a load from spill slot #1 cannot 
move above a store of spill slot #2. 
- Enable post-alloc scheduling for x86 at optimization leverl Default and above.

llvm-svn: 84424

llvm-svn: 84411

llvm-svn: 84410

llvm-svn: 84408

instructions.

llvm-svn: 84404

llvm-svn: 84403

llvm-svn: 84399

accessible through opt.  Patch by Tobias Grosser!

llvm-svn: 84397

llvm-svn: 84396

LLVMBuildMalloc was reimplemented but with the bug that it didn't insert the
resulting instruction.

llvm-svn: 84374

llvm-svn: 84373

llvm-svn: 84372

allowing it to simplify the crazy constantexprs in the testcases
down to something sensible.  This allows -std-compile-opts to
completely "devirtualize" the pointers to member functions in
the testcase from PR5176.

llvm-svn: 84368

llvm-svn: 84358

llvm-svn: 84357

llvm-svn: 84356

llvm-svn: 84355