allow it to go into an infinite loop, filling up the disk!

llvm-svn: 30494

add comments
untabify

llvm-svn: 30486

llvm-svn: 30485

llvm-svn: 30483

llvm-svn: 30482

like:
long long test(long long X, int Y) {
  return 1ULL << Y;
}
long long test2(long long X, int Y) {
  return -1LL << Y;
}

which we used to compile to:

_test:
        li r2, 1
        subfic r3, r5, 32
        li r4, 0
        addi r6, r5, -32
        srw r3, r2, r3
        slw r4, r4, r5
        slw r6, r2, r6
        or r3, r4, r3
        slw r4, r2, r5
        or r3, r3, r6
        blr
_test2:
        li r2, -1
        subfic r3, r5, 32
        addi r6, r5, -32
        srw r3, r2, r3
        slw r4, r2, r5
        slw r2, r2, r6
        or r3, r4, r3
        or r3, r3, r2
        blr

Now we produce:

_test:
        li r2, 1
        addi r3, r5, -32
        subfic r4, r5, 32
        slw r3, r2, r3
        srw r4, r2, r4
        or r3, r4, r3
        slw r4, r2, r5
        blr
_test2:
        li r2, -1
        subfic r3, r5, 32
        addi r6, r5, -32
        srw r3, r2, r3
        slw r4, r2, r5
        slw r2, r2, r6
        or r3, r4, r3
        or r3, r3, r2
        blr

llvm-svn: 30479

llvm-svn: 30478

llvm-svn: 30477

llvm-svn: 30474

llvm-svn: 30470

that we can't modify the CFG any more, at least not until it's possible
to update the dominator tree (PR217).

llvm-svn: 30469

A pass to remove the worst of the replay trap offenders, and as a bonus, align basic blocks when it is free to do so

llvm-svn: 30467

llvm-svn: 30465

llvm-svn: 30463

llvm-svn: 30462

llvm-svn: 30461

llvm-svn: 30460

... args, remove the '...'.

This is Transforms/DeadArgElim/dead_vaargs.ll

llvm-svn: 30459

llvm-svn: 30457

llvm-svn: 30456

llvm-svn: 30452

llvm-svn: 30451

llvm-svn: 30450

Use isLogicalShift/isArithmeticShift to simplify code.

llvm-svn: 30448

Added X86 StdCall & FastCall calling conventions. Codegen will follow.

llvm-svn: 30446

llvm-svn: 30445

Instruction::isRelational to Instruction::isComparison.

llvm-svn: 30444

llvm-svn: 30443

being erased.

llvm-svn: 30442

llvm-svn: 30441

llvm-svn: 30418

llvm-svn: 30407

llvm-svn: 30406

llvm-svn: 30405

llvm-svn: 30403

llvm-svn: 30402

llvm-svn: 30399

llvm-svn: 30397

changes to be incorrect.  They just weren't showing up in any of our current testcases.

llvm-svn: 30385

llvm-svn: 30384