llvm-svn: 28110

scheduler can go into a "vertical mode" (i.e. traversing up the two-address
chain, etc.) when the register pressure is low.
This does seem to reduce the number of spills in the cases I've looked at. But
with x86, it's no guarantee the performance of the code improves.
It can be turned on with -sched-vertically option.

llvm-svn: 28108

llvm-svn: 28107

llvm-svn: 28105

llvm-svn: 28104

llvm-svn: 28102

llvm-svn: 28101

llvm-svn: 28099

thing that can be in it.  Remove a dead method.

llvm-svn: 28098

Loading and storing off R0 isn't what we wanted.  Also, taking some CR's out of
CRRC seems to cause failures as well.  Further investigation is required.

llvm-svn: 28097

llvm-svn: 28096

llvm-svn: 28095

llvm-svn: 28094

llvm-svn: 28093

llvm-svn: 28092

llvm-svn: 28091

llvm-svn: 28090

movlps cannot be used (e.g. when load from m64 has multiple uses).

llvm-svn: 28089

in MachineRelocation to create Relocations.

llvm-svn: 28088

llvm-svn: 28087

llvm-svn: 28083

simplifies the MachineCodeEmitter interface just a little bit and makes
BasicBlocks work like constant pools and jump tables.

llvm-svn: 28082

llvm-svn: 28081

instruction.

llvm-svn: 28080

not be 100% dense.  Increase the minimum threshold for the number of cases
in a switch statement from 4 to 6 in order to create a jump table.

llvm-svn: 28079

the heuristic to further reduce spills for several test cases. (Note, it may
not necessarily translate to runtime win!)

llvm-svn: 28076

Refactor TargetMachine, pushing handling of TargetData into the target-specific subclasses.  This has one caller-visible change: getTargetData() now returns a pointer instead of a reference.

This fixes PR 759.

llvm-svn: 28074

llvm-svn: 28073

llvm-svn: 28071

the prototype of the called function.

llvm-svn: 28070

llvm-svn: 28069

llvm-svn: 28068

llvm-svn: 28066

1. Change several methods in the MachineCodeEmitter class to be pure virtual.
2. Suck emitConstantPool/initJumpTableInfo into startFunction, removing them
   from the MachineCodeEmitter interface, and reducing the amount of target-
   specific code.
3. Change the JITEmitter so that it allocates constantpools and jump tables
   *right* next to the functions that they belong to, instead of in a separate
   pool of memory.  This makes all memory for a function be contiguous, and
   means the JITEmitter only tracks one block of memory now.

llvm-svn: 28065

llvm-svn: 28063

just have the JIT malloc them.

llvm-svn: 28062

llvm-svn: 28061

byte format.  This doesn't work when using the code emitter in a cross target
environment.  Since the code emitter is only really used by the JIT, this
isn't a current problem, but if we ever start emitting .o files, it would be.

llvm-svn: 28060

code emission location into the base class, instead of being in the derived classes.

This change means that low-level methods like emitByte/emitWord now are no longer
virtual (yaay for speed), and we now have a framework to support growable code
segments.  This implements feature request #1 of PR469.

llvm-svn: 28059

don't step on R11 in the middle of a function when saving and restoring CRs

llvm-svn: 28058