llvm-svn: 25754

are not skewed out of view.

llvm-svn: 25753

llvm-svn: 25752

llvm-svn: 25751

llvm-svn: 25750

llvm-svn: 25749

llvm-svn: 25748

llvm-svn: 25747

faster.  This cuts about 120 lines of code out of the legalizer (mostly code
checking to see if operands have changed).

It also fixes an ugly performance issue, where the legalizer cloned the entire
graph after any change.  Now the "UpdateNodeOperands" method gives it a chance
to reuse nodes if the operands of a node change but not its opcode or valuetypes.

This speeds up instruction selection time on kimwitu++ by about 8.2% with a
release build.

llvm-svn: 25746

llvm-svn: 25745

llvm-svn: 25744

llvm-svn: 25743

llvm-svn: 25742

llvm-svn: 25741

llvm-svn: 25740

llvm-svn: 25739

llvm-svn: 25738

llvm-svn: 25737

1. Pull out the expand cases for BSWAP and CT* into a separate function,
   reducing the size of LegalizeOp.
2. Fix a bug where expand(bswap i64) was wrong when i64 is legal.
3. Changed LegalizeOp/PromoteOp so that the legalizer never needs to be
   iterative.  It now operates in a single pass over the nodes.
4. Simplify a LOT of code, with a net reduction of ~280 lines.

llvm-svn: 25736

provide the expansion for i64 calls itself

llvm-svn: 25735

llvm-svn: 25734

    // FIXME: revisit this when we have some kind of mechanism by which targets
    // can decided legality of vector constants, of which there may be very
    // many.

llvm-svn: 25733

relegalizes the stuff it returns.

Add the ability to custom expand ADD/SUB, so that targets don't need to deal
with ADD_PARTS/SUB_PARTS if they don't want.

Fix some obscure potential bugs and simplify code.

llvm-svn: 25732

ExpandLibCall do it itself.

llvm-svn: 25731

a libcall.

llvm-svn: 25730

llvm-svn: 25729

llvm-svn: 25728

llvm-svn: 25727

who don't want the default behavior (Alpha).

llvm-svn: 25726

llvm-svn: 25724

llvm-svn: 25723

llvm-svn: 25721

future work.

llvm-svn: 25720

llvm-svn: 25719

llvm-svn: 25718

llvm-svn: 25717

llvm-svn: 25716

llvm-svn: 25715

llvm-svn: 25714

llvm-svn: 25713