llvm-svn: 25173

GDB use tolerable

llvm-svn: 25064

llvm-svn: 24019

For example, we can now join things like [0-30:0)[31-40:1)[52-59:2)
with [40:60:0) if the 52-59 range is defined by a copy from the 40-60 range.
The resultant range ends up being [0-30:0)[31-60:1).

This fires a lot through-out the test suite (e.g. shrinking bc from
19492 -> 18509 machineinstrs) though most gains are smaller (e.g. about
50 copies eliminated from crafty).

llvm-svn: 23866

llvm-svn: 23400

llvm-svn: 23294

only add a reload live range once for the instruction.  This is one step
towards fixing a regalloc pessimization that Nate notice, but is later undone
by the spiller (so no code is changed).

llvm-svn: 23293

preserve livevar

llvm-svn: 23259

llvm-svn: 23206

llvm-svn: 22989

llvm-svn: 22529

llvm-svn: 22528

llvm-svn: 22002

llvm-svn: 21927

llvm-svn: 21420

removes noop moves.

llvm-svn: 21183

llvm-svn: 21182

llvm-svn: 20555

numbering values in live ranges for physical registers.

The alpha backend currently generates code that looks like this:

  vreg = preg
...
  preg = vreg
  use preg
...
  preg = vreg
  use preg

etc.  Because vreg contains the value of preg coming in, each of the
copies back into preg contain that initial value as well.

In the case of the Alpha, this allows this testcase:

void "foo"(int %blah) {
        store int 5, int *%MyVar
        store int 12, int* %MyVar2
        ret void
}

to compile to:

foo:
        ldgp $29, 0($27)
        ldiq $0,5
        stl $0,MyVar
        ldiq $0,12
        stl $0,MyVar2
        ret $31,($26),1

instead of:

foo:
        ldgp $29, 0($27)
        bis $29,$29,$0
        ldiq $1,5
        bis $0,$0,$29
        stl $1,MyVar
        ldiq $1,12
        bis $0,$0,$29
        stl $1,MyVar2
        ret $31,($26),1

This does not seem to have any noticable effect on X86 code.

This fixes PR535.

llvm-svn: 20536

llvm-svn: 19386

Make only one print method to avoid overloaded virtual warnings when \
compiled with -Woverloaded-virtual

llvm-svn: 18589

llvm-svn: 17238

llvm-svn: 17215

it was a use, def, or both.  This allows us to be less pessimistic in our
analysis of them.  In practice, this doesn't make a big difference, but it
doesn't hurt either.

llvm-svn: 16632

llvm-svn: 16628

llvm-svn: 16613

* Add const_iterator stuff
* Add a print method, which means that I can now call dump() from the
  debugger.

llvm-svn: 16612

runs (if coalescing is disabled for example).

llvm-svn: 16259

analysis running time from 2.7869secs to 2.5226secs on 176.gcc.

llvm-svn: 16244

llvm-svn: 16153

Patch contributed by Paolo Invernizzi!

llvm-svn: 16152

Move include/Config and include/Support into include/llvm/Config,
include/llvm/ADT and include/llvm/Support. From here on out, all LLVM
public header files must be under include/llvm/.

llvm-svn: 16137

llvm-svn: 16123

runs after the initial run of the live interval analysis.

llvm-svn: 16075

llvm-svn: 16060

 Regression.CodeGen.Generic.2004-04-09-SameValueCoalescing.llx and the
code size problem.

This bug prevented us from doing most register coallesces.

llvm-svn: 16031

llvm-svn: 15784

llvm-svn: 15490

llvm-svn: 15489

llvm-svn: 15196