it as a late BURR scheduling tie-breaker.
Intuitively, it's good to push down instructions whose results are liveout so
their long live ranges won't conflict with other values which are needed inside
the BB. Further prioritize liveout instructions by the number of operands which
are calculated within the BB.

llvm-svn: 35109

llvm-svn: 35108

llvm-svn: 35107

llvm-svn: 35105

llvm-svn: 35104

llvm-svn: 35097

llvm-svn: 35096

llvm-svn: 35095

llvm-svn: 35094

llvm-svn: 35093

e.g.
t1 = op t2, c1
t3 = op t4, c2
and the following instructions are both ready.
t2 = op c3
t4 = op c4

Then schedule t2 = op first.
i.e.
t4 = op c4
t2 = op c3
t1 = op t2, c1
t3 = op t4, c2

This creates more short live intervals which work better with the register
allocator.

llvm-svn: 35089

llvm-svn: 35088

llvm-svn: 35087

llvm-svn: 35086

llvm-svn: 35083

Fix PR1244 and Transforms/InstCombine/2007-03-13-CompareMerge.ll

llvm-svn: 35082

"APInt::getAllOnesValue(ShiftAmt).zextOrCopy(BitWidth)",
to handle ShiftAmt == BitWidth situation, use zextOrCopy() instead of
zext().

llvm-svn: 35080

  1. Ensure VTy, KnownOne and KnownZero have same bitwidth.
  2. Make code more efficient.

llvm-svn: 35078

llvm-svn: 35077

More flexible TargetLowering LSR hooks for testing whether an immediate is a legal target address immediate or scale.

llvm-svn: 35076

llvm-svn: 35075

More flexible TargetLowering LSR hooks for testing whether an immediate is a legal target address immediate or scale.

llvm-svn: 35074

 a legal target address immediate or scale.

llvm-svn: 35073

llvm-svn: 35072

llvm-svn: 35070

llvm-svn: 35068

llvm-svn: 35067

can collide with system defined names.  Windows defines _BB, for example.

llvm-svn: 35066

llvm-svn: 35065

Patch by Zhou Sheng.

llvm-svn: 35064

Patch by Zhou Sheng.

llvm-svn: 35063

llvm-svn: 35062

  1. Replace getSignedMinValue() with getSignBit() for better code readability.
  2. Replace APIntOps::shl() with operator<<= for convenience.
  3. Make APInt construction more effective.

llvm-svn: 35060

optimization power.

llvm-svn: 35058

llvm-svn: 35057

llvm-svn: 35056

the addition. Please let me know if you have suggestions.

llvm-svn: 35055

llvm-svn: 35053

llvm-svn: 35052

User from the list of I users.

llvm-svn: 35051