this offers no performance advantage.

llvm-svn: 34415

llvm-svn: 34414

llvm-svn: 34413

llvm-svn: 34412

llvm-svn: 34411

llvm-svn: 34410

llvm-svn: 34409

llvm-svn: 34408

llvm-svn: 34407

Much of its content is now in other parts of the doc, and this brings it up
immediately after 'stay informed' and right before 'code reviews'.

llvm-svn: 34406

llvm-svn: 34405

move testcases above quality.  Mention that a testcase is part of quality.

llvm-svn: 34404

incremental development as a subsection of it.

llvm-svn: 34403

llvm-svn: 34402

llvm-svn: 34401

llvm-svn: 34400

Revert patches that caused the problem. Evan, please investigate and reapply
when you've discovered the problem.

llvm-svn: 34399

llvm-svn: 34398

2. Implement toString for power-of-2 radix without using divide and always
   printing full words. This allows hex/binary to look at the bit
   respresentation of the APInt as well as avoid bugs in divide.

llvm-svn: 34396

llvm-svn: 34395

llvm-svn: 34394

llvm-svn: 34393

2. Teach slt about signedness.
3. Teach roundToDouble to properly sign extend.

llvm-svn: 34391

   Size matters in this case.
2. Remove the unused whichByte private function, which was also broken.
3. Remove the non-const overload of the getWord function, getWord() is
   never used as an lvalue.
4. Rename some local variables for clarity (e.g. API -> Result).

llvm-svn: 34390

2. Consolidate memory allocation into just two inline functions.
3. Convert "unsigned" to uint32_t to gaurantee its size.
4. Eliminate magic constants and replace with symbolic equivalent.
5. Improve code documentation slightly.
6. Simplify the logical operator code because bitwidths must be the same.
7. Fix indentation per coding standards.
8. Use exit-early style to reduce indentation in several functions.

llvm-svn: 34389

Fix line breaks and 80 cols violation.
Simplify operator^= since bitwidths must be the same.

llvm-svn: 34388

llvm-svn: 34387

Fix bugs in countLeadingZeros and countTrailingZeros.

llvm-svn: 34386

compile-time regression in LLC.

llvm-svn: 34385

llvm-svn: 34384

- When coalescing a copy MI, if its destination is "dead", propagate the
  property to the source MI's destination if there are no intervening uses.
- Detect dead function live-in's and remove them.

llvm-svn: 34383

llvm-svn: 34382

llvm-svn: 34381

llvm-svn: 34380

- Allow LiveVariables to track liveness of more registers.

llvm-svn: 34379

llvm-svn: 34378

llvm-svn: 34377

llvm-svn: 34376

  virtual registers, test if they the same.
- Added a virtual method to return target specific reserved registers, e.g. SP.

llvm-svn: 34375

_test2:
        li r2, 0
        lis r3, 1
        std r2, 9024(r3)
        blr

instead of:

_test2:
        lis r2, 1
        li r3, 0
        ori r2, r2, 9024
        std r3, 0(r2)
        blr

This implements CodeGen/PowerPC/LargeAbsoluteAddr.ll:test2

llvm-svn: 34373