a subtract is cheaper than a multiply. This generalizes an existing transform.

llvm-svn: 59800

llvm-svn: 59778

llvm-svn: 59758

inlining function, then increase the stack protection level on the inlining
function.

llvm-svn: 59757

llvm-svn: 59745

llvm-svn: 59688

llvm-svn: 59662

Do not use separate utility to walk all instructions and remove dead dbg intrinsics. Let instcombiner do this job.

llvm-svn: 59659

llvm-svn: 59658

If there are two consecutive llvm.dbg.stoppoint calls then
it is likely that the optimizer deleted code in between these
two intrinsics. Keep only the last llvm.dbg.stoppoint in this case.

llvm-svn: 59657

llvm-svn: 59570

llvm-svn: 59569

This pass makes it easier to test wheter debugging info. influences optimization passes or not.

llvm-svn: 59552

Remove all dead globals from llvm.metadata.
Ignore linkonce linkage for selected llvm.dbg values.

llvm-svn: 59547

llvm-svn: 59538

llvm-svn: 59518

Give SIToFPInst preference over UIToFPInst because it is faster on platforms that are widely used.

llvm-svn: 59476

llvm-svn: 59471

llvm-svn: 59466

llvm-svn: 59454

This fixed PR3078.

llvm-svn: 59416

llvm-svn: 59409

llvm-svn: 59406

llvm-svn: 59403

llvm-svn: 59402

llvm-svn: 59401

llvm-svn: 59400

llvm-svn: 59398

a bit.  Next step is to factor out into their own helper functions.

llvm-svn: 59397

llvm-svn: 59395

llvm-svn: 59392

llvm-svn: 59390

folded into the select.

llvm-svn: 59389

Eliminate the cases checking for cond?0:-1, since that is already
handled by commutative checking.

llvm-svn: 59388

llvm-svn: 59381

llvm-svn: 59380

Strip debug information before stripping symbol names. 

llvm-svn: 59328

llvm-svn: 59208

llvm-svn: 59098

llvm-svn: 59093