functional change with this patch.

llvm-svn: 34806

llvm-svn: 34793

redundant and more verbose than the ConstantInt(const APInt&) constructor.

llvm-svn: 34792

llvm-svn: 34774

from a predicate and an APInt. This is removed from ConstantRange class
so that ConstantRange doesn't have to depend on lib/VMCore.

llvm-svn: 34760

APInt. The implied type is the integer type that corresponds to the bit
width of the APInt.

llvm-svn: 34757

llvm-svn: 34703

llvm-svn: 34702

llvm-svn: 34681

Implement review feedback:
1. Use new APInt::RoundDoubleToAPInt interface to specify the bit width so
   that we don't have to truncate or extend in constant folding.
2. Fix a pasteo in SDiv that prevented a check for overflow.
3. Fix the shift operators: undef happens when the shift amount is equal
   to the bitwidth.

llvm-svn: 34677

llvm-svn: 34669

llvm-svn: 34664

widths > 64 bits.

llvm-svn: 34663

Implement constant folding via APInt instead of uint64_t.

llvm-svn: 34660

lib/Analysis/ConstantFolding.

llvm-svn: 34653

Implement the first step towards arbitrary precision integer support in
LLVM. The APInt class provides arbitrary precision arithmetic and value
representation. This patch changes ConstantInt to use APInt as its value
representation without supporting bit widths > 64 yet. That change will
come after ConstantFolding handles bit widths > 64 bits.

llvm-svn: 34647

llvm-svn: 34627

llvm-svn: 34626

exprs hanging off a global, even if the global is not otherwise dead.  This
requires some tricky iterator gymnastics.

This implements Transforms/GlobalOpt/constantexpr-dangle.ll by deleting a
constantexpr that made it appear that the address of the function was taken.

llvm-svn: 34608

llvm-svn: 34606

llvm-svn: 34548

solve a crash in -instcombine -debug that was hit while investigating PR1217

llvm-svn: 34544

llvm-svn: 34457

and is more memory efficient.

llvm-svn: 34446

heavy-weight ValueMap class.  This reduces mem usage bc reading kc++ by 29K,
even though it only creates 2955 constant ints!

llvm-svn: 34445

llvm-svn: 34443

llvm-svn: 34441

llvm-svn: 34440

llvm-svn: 34436

llvm-svn: 34425

llvm-svn: 34424

llvm-svn: 34423

llvm-svn: 34422

llvm-svn: 34419

compile-time regression in LLC.

llvm-svn: 34385

llvm-svn: 34364

llvm-svn: 34339

llvm-svn: 34334

causes it to require no allocations and no symtab lookups in the common
case.  This speeds up instcombine 9.2% on 447.dealII.

llvm-svn: 34324

which allocates a string.  This speeds up instcombine on 447.dealII by 5%.

llvm-svn: 34318