llvm-svn: 35350

Fix SingleSource/Regression/C/2003-05-21-UnionBitFields.c by changing a
getHighBitsSet call to getLowBitsSet call that was incorrectly converted
from the original lshr constant expression.

llvm-svn: 35348

llvm-svn: 35347

Remove a use of getLowBitsSet that caused the mask used for replacement of
shl/lshr pairs with an AND instruction to be computed incorrectly. Its not
clear exactly why this is the case. This solves the disappearing shifts
problem, but it doesn't fix Regression/C/2003-05-21-UnionBitFields. It
seems there is more going on.

llvm-svn: 35342

llvm-svn: 35341

* Don't assume shift amounts are <= 64 bits
* Avoid creating an extra APInt in SubOne and AddOne by using -- and ++
* Add another use of getLowBitsSet
* Convert a series of if statements to a switch

llvm-svn: 35339

strategy, emit JT's where possible.

llvm-svn: 35338

llvm-svn: 35337

llvm-svn: 35336

using the facilities of APInt. While this duplicates a tiny fraction of
the constant folding code, it also makes the code easier to read and
avoids large ConstantExpr overhead for simple, known computations.

llvm-svn: 35335

llvm-svn: 35334

2. Use isStrictlyPositive() instead of isPositive() in two places where
   they need APInt value > 0 not only >=0.

llvm-svn: 35333

CodeGen/X86/2007-03-24-InlineAsmVectorOp.ll

llvm-svn: 35332

llvm-svn: 35330

llvm-svn: 35329

implement initial support for the silly X constraint.  Testcase here: CodeGen/X86/2007-03-24-InlineAsmXConstraint.ll

llvm-svn: 35327

APInt with its type mask.

llvm-svn: 35325

llvm-svn: 35324

not just the first letter.  No functionality change.

llvm-svn: 35322

* Convert the last use of a uint64_t that should have been an APInt.
* Change ComputeMaskedBits to have a const reference argument for the Mask
  so that recursions don't cause unneeded temporaries. This causes temps
  to be needed in other places (where the mask has to change) but this
  change optimizes for the recursion which is more frequent.
* Remove two instances of &ing a Mask with getAllOnesValue. Its not
  needed any more because APInt is accurate in its bit computations.
* Start using the getLowBitsSet and getHighBits set methods on APInt
  instead of shifting. This makes it more clear in the code what is
  going on.

llvm-svn: 35321

Allow the b/h/w/k constraints to be applied to values that have multiple alternatives, and end up not being registers.

llvm-svn: 35320

llvm-svn: 35319

llvm-svn: 35318

llvm-svn: 35314

llvm-svn: 35299

llvm-svn: 35298

llvm-svn: 35297

llvm-svn: 35296

Convert some calls to ConstantInt::getZExtValue() into getValue() and
use APInt facilities in the subsequent computations.

llvm-svn: 35294

llvm-svn: 35293

llvm-svn: 35292

Add final support to get the QT example to compile.

llvm-svn: 35290

llvm-svn: 35289

* APIntify visitAdd and visitSelectInst
* Remove unused uint64_t versions of utility functions that have been
  replaced with APInt versions.
This completes most of the changes for APIntification of InstCombine. This
passes llvm-test and llvm/test/Transforms/InstCombine/APInt.

Patch by Zhou Sheng.

llvm-svn: 35287

llvm-svn: 35286

APIntify visitDiv, visitMul and visitRem.

Patch by Zhou Sheng.

llvm-svn: 35283

llvm-svn: 35282

APIntify several utility functions supporting logical operators and shift
operators.

Patch by Zhou Sheng.

llvm-svn: 35281

requirements. We must return NaN in some cases and correctly signed
infinity in other cases. Passes CFP2006 (not that that says much).

llvm-svn: 35277

llvm-svn: 35276