llvm-svn: 34494

llvm-svn: 34493

llvm-svn: 34492

llvm-svn: 34491

llvm-svn: 34490

llvm-svn: 34488

llvm-svn: 34487

llvm-svn: 34486

extract the value, not the number of words implied by the active bits.
This fixes numerous, but not all divide bugs.

llvm-svn: 34484

word size. This fixes all reads of uninitialized data (buffer over read)
and makes APInt.cpp memory clean, per valgrind. The only remaining
problem is division in a few cases.

llvm-svn: 34483

llvm-svn: 34482

llvm-svn: 34481

llvm-svn: 34480

llvm-svn: 34479

llvm-svn: 34478

llvm-svn: 34477

llvm-svn: 34476

llvm-svn: 34475

llvm-svn: 34474

llvm-svn: 34473

llvm-svn: 34472

llvm-svn: 34471

Add implicit uses of EBX to calls to ensure liveintervalanalysis does not treat
the GOT in EBX move as dead upon definition.
This should fix PR1207.

llvm-svn: 34470

llvm-svn: 34469

reads, and reduce the number of temporary APInt instances we construct.

llvm-svn: 34467

fixes PR1208.

llvm-svn: 34466

llvm-svn: 34465

llvm-svn: 34464

2. Change 0 initialization of union to larger component so all is zeroed.
3. Fix the borrow logic in subtraction so it works for > 128 bits.
4. Rewrite fromString to use a simpler but correct algorithm and also to
   not set the bit width contrary to the user's request.
5. Optimize toString a bit by making it only do one Knuth divide per
   iteration instead of two.

With these changes, all arithmetic passes (verified by pari/GP) up to
1024 bits except for certain division cases.

llvm-svn: 34463

llvm-svn: 34462

llvm-svn: 34461

llvm-svn: 34460

Fix toString to correctly return "0" for zero valued APInts over 128 bits.

llvm-svn: 34459

functions more.

llvm-svn: 34458

llvm-svn: 34457

llvm-svn: 34456

Attempt #3 for getting a portable INFINITY value.

llvm-svn: 34454

constants (avoids warnings).

llvm-svn: 34452

1. Ensure pVal is set to 0 in each constructor.
2. Fix roundToDouble to make correct calculations and not read beyond the
   end of allocated memory.
3. Implement Knuth's "classical algorithm" for division from scratch and
   eliminate buffer overflows and uninitialized mememory reads. Document
   it properly too.
4. Implement a wrapper function for KnuthDiv which handles the 64-bit to
   32-bit conversion and back. It also implement short division for the
   n == 1 case that Knuth's algorithm can't handle.
5. Simplify the logic of udiv and urem a little, make them exit early, and
   have them use the "divide" wrapper function to perform the division
   or remainder operation.
6. Move the toString function to the end of the file, closer to where
   the division functions are located.

Note: division is still broken for some > 64 bit values, but at least it
      doesn't crash any more.
llvm-svn: 34449

llvm-svn: 34448