llvm-svn: 35680

elsewhere.

llvm-svn: 35668

llvm-svn: 35665

llvm-svn: 35655

some constant exprs to apints).

Thanks to Anton for tracking down a small testcase that triggered this!

llvm-svn: 35633

ldecod now passes.

llvm-svn: 35626

llvm-svn: 35620

llvm-svn: 35615

llvm-svn: 35614

llvm-svn: 35612

llvm-svn: 35607

2. Use cheaper APInt methods.

llvm-svn: 35594

llvm-svn: 35593

target hook.  This allows us to codegen a loop as:

LBB1_1: @cond_next
        mov r2, #0
        str r2, [r0, +r3, lsl #2]
        add r3, r3, #1
        cmn r3, #1
        bne LBB1_1      @cond_next

instead of:

LBB1_1: @cond_next
        mov r2, #0
        str r2, [r0], #+4
        add r3, r3, #1
        cmn r3, #1
        bne LBB1_1      @cond_next

This looks the same, but has one fewer induction variable (and therefore,
one fewer register) live in the loop.

llvm-svn: 35592

llvm-svn: 35588

llvm-svn: 35587

test/Transforms/InstCombine/xor.ll:test28

llvm-svn: 35584

isel has its own particular features that it wants in the CFG, in order to
reduce the number of times a constant is computed, etc.  Make sure that we
clean up the CFG before doing any other things for isel.  Doing so can
dramatically reduce the number of split edges and reduce the number of
places that constants get computed.  For example, this shrinks
CodeGen/Generic/phi-immediate-factoring.ll from 44 to 37 instructions on X86,
and from 21 to 17 MBB's in the output.  This is primarily a code size win,
not a performance win.

This implements CodeGen/Generic/phi-immediate-factoring.ll and PR1296.

llvm-svn: 35575

llvm-svn: 35563

llvm-svn: 35561

llvm-svn: 35555

Support overloaded intrinsics bswap, ctpop, cttz, ctlz.

llvm-svn: 35547

llvm-svn: 35536

llvm-svn: 35528

llvm-svn: 35525

llvm-svn: 35524

llvm-svn: 35510

   amount is safe.
2. Use new method on ConstantInt instead of (? :) operator.
3. Use new method uge() on ConstantInt to simplify codes.

llvm-svn: 35505

llvm-svn: 35503

2. Let APInt variable do the binary operation stuff instead of using
   ConstantExpr::getXXX.

llvm-svn: 35450

llvm-svn: 35446

1. Line out nested call of APInt::zext/trunc.
2. Make more use of APInt::getHighBitsSet/getLowBitsSet.
3. Use APInt[] operator instead of expression like "APIntVal & SignBit".

llvm-svn: 35444

   instead of using ConstantExpr::getXX.
2. Use constant reference to APInt if possible instead of expensive
   APInt copy.

llvm-svn: 35443

llvm-svn: 35431

2. Use APInt[] instead of "X & SignBit".
3. Clean up some codes.
4. Make the expression like "ShiftAmt = ShiftAmtC->getZExtValue()" safe.

llvm-svn: 35424

2. Make the APInt value do the zext/trunc stuff instead of using
   ConstantExpr::getZExt().

llvm-svn: 35422

llvm-svn: 35418

llvm-svn: 35414

1. Line out nested use of zext/trunc.
2. Make more use of getHighBitsSet/getLowBitsSet.
3. Use APInt[] != 0 instead of "(APInt & SignBit) != 0".

llvm-svn: 35408

When converting an add/xor/and triplet into a trunc/sext, only do so if the
intermediate integer type is a bitwidth that the targets can handle.

llvm-svn: 35400