a chance to custom legalize setcc, which broke a bunch of C++ Codes.
Testcase here: CodeGen/X86/2006-01-30-LongSetcc.ll

llvm-svn: 25821

of lowered target nodes.

llvm-svn: 25804

Move MaskedValueIsZero from the DAGCombiner to the TargetLowering interface,making isMaskedValueZeroForTargetNode simpler, and useable from other partsof the compiler.

llvm-svn: 25803

to permit recursion

llvm-svn: 25799

llvm-svn: 25794

llvm-svn: 25785

instead.

llvm-svn: 25780

llvm-svn: 25774

custom expansion of ConstantFP nodes.

llvm-svn: 25772

llvm-svn: 25767

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: 25744

llvm-svn: 25742

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

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: 25728

llvm-svn: 25727

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

llvm-svn: 25726

llvm-svn: 25723

llvm-svn: 25721

the same functionality.  This addresses another piece of bug 680.  Next,
on to fixing Alpha VAARG, which I broke last time.

llvm-svn: 25696

llvm-svn: 25694

llvm-svn: 25691

llvm-svn: 25689

llvm-svn: 25687

llvm-svn: 25686

llvm-svn: 25685

Handle 64 in DIEs.

llvm-svn: 25684

llvm-svn: 25676

ISD::INLINEASM node.

llvm-svn: 25668

with outputs or inputs are not supported yet. :)

llvm-svn: 25664

llvm-svn: 25662

Global Variable information is now pulled from "llvm.dbg.globals"

llvm-svn: 25655

chain successors.

llvm-svn: 25630