If all sources of a PHI node are defined by an implicit_def, just emit an implicit_def instead of a copy.

llvm-svn: 50927

llvm-svn: 49543

llvm-svn: 49198

- Be (slightly) smarter about where to place the copies.

llvm-svn: 49165

llvm-svn: 49099

findRegisterUseOperandIdx, findRegisterDefOperandIndx. Fix some naming inconsistencies.

llvm-svn: 47927

llvm-svn: 46930

llvm-svn: 46016

preserved.

llvm-svn: 45596

Machine-level API cleanup instigated by Chris.

llvm-svn: 45470

that "machine" classes are used to represent the current state of
the code being compiled.  Given this expanded name, we can start 
moving other stuff into it.  For now, move the UsedPhysRegs and
LiveIn/LoveOuts vectors from MachineFunction into it.

Update all the clients to match.

This also reduces some needless #includes, such as MachineModuleInfo
from MachineFunction.

llvm-svn: 45467

e.g. MO.isMBB() instead of MO.isMachineBasicBlock().  I don't plan on 
switching everything over, so new clients should just start using the 
shorter names.

Remove old long accessors, switching everything over to use the short
accessor: getMachineBasicBlock() -> getMBB(), 
getConstantPoolIndex() -> getIndex(), setMachineBasicBlock -> setMBB(), etc.

llvm-svn: 45464

llvm-svn: 45418

llvm-svn: 43866

Tested with "make check"!

llvm-svn: 42346

llvm-svn: 36873

llvm-svn: 36662

Due to darwin gcc bug, one version of darwin linker coalesces
static const int, which defauts PassID based pass identification.

llvm-svn: 36652

llvm-svn: 36632

llvm-svn: 36250

llvm-svn: 36233

llvm-svn: 35140

llvm-svn: 33749

llvm-svn: 32698

is 'unsigned'.

llvm-svn: 32279

with our English dead."

No! Really! Serious this time...It was how the vreg uses were being
adjusted that was causing hte Olden tests to fail. I corrected this and
the Olden and Regression tests all passed.

llvm-svn: 30644

in olden among others.

llvm-svn: 30637

llvm-svn: 30634

has disappeared.

llvm-svn: 30633

llvm-svn: 30628

a function, do it up front in linear time (going through all of the
instructions once). We create a map out of them. Then it's no problem to
use the information in it during elimination...

llvm-svn: 30624

llvm-svn: 29911

llvm-svn: 29648

llvm-svn: 29220

dropped.  This shrinks libllvmgcc.dylib another 67K

llvm-svn: 28975

use virtual registers.  We now allow the first instruction in a block of
terminators to use virtual registers, and update phi elimination to correctly
update livevar when eliminating phi's.  This fixes a problem on a testcase
Andrew sent me.

llvm-svn: 25083

don't help anyone)

llvm-svn: 25081

llvm-svn: 23609

llvm-svn: 23606

llvm-svn: 22992