llvm-svn: 31417

improves readability of the call handling code significantly, as well as
makes it clear which parts are hacky (externals) and which parts are good
(call handling).

No functionality change.

llvm-svn: 31415

llvm-svn: 31414

llvm-svn: 31413

llvm-svn: 31412

llvm-svn: 31411

llvm-svn: 31410

llvm-svn: 31409

llvm-svn: 31408

llvm-svn: 31405

llvm-svn: 31401

llvm-svn: 31400

llvm-svn: 31399

llvm-svn: 31398

llvm-svn: 31397

llvm-svn: 31395

llvm-svn: 31394

llvm-svn: 31393

llvm-svn: 31392

llvm-svn: 31388

llvm-svn: 31387

llvm-svn: 31386

llvm-svn: 31385

1. Hash not quite right for DIEValues.

2. Not going to use Usage (no significant benefit.)

llvm-svn: 31384

llvm-svn: 31382

Turn on -Wunused and -Wno-unused-parameter. Clean up most of the resulting
fall out by removing unused variables. Remaining warnings have to do with
unused functions (I didn't want to delete code without review) and unused
variables in generated code. Maintainers should clean up the remaining
issues when they see them. All changes pass DejaGnu tests and Olden.

llvm-svn: 31380

General clean up of teh dwarf writer.

1. Most significant is the folding of debug information entries.  This
reduced self hosted -g SelectionDAGISel.s from 120M to 13M and pretty
close to matching .o file sizes with gcc.

2. Debug information entry printing for debugging the dwarf code.

3. Bring all the code closer to llvm standards.

4. Misc. fixes and doc clean ups.

llvm-svn: 31379

remove unused variables from lowerCall

llvm-svn: 31378

llvm-svn: 31377

llvm-svn: 31376

llvm-svn: 31375

llvm-svn: 31374

llvm-svn: 31373

llvm-svn: 31371

Replace the REM instruction with UREM, SREM and FREM.

llvm-svn: 31369

sdisel changes, this eliminates a ton of copies around common inline asms.
For example:

int test2(int Y, int X) {
  asm("foo %0, %1" : "=r"(X): "r"(X));
  return X;
}

now compiles to:

_test2:
        foo r3, r4
        blr

instead of:

_test2:
        mr r2, r4
        foo r2, r2
        mr r3, r2
        blr

GCC produces:

_test2:
        foo r4, r4
        mr r3,r4
        blr

llvm-svn: 31367

no fixes physreg.  Treat this as permission to use any register in the register
class.  When this happens and it is safe, allow the llvm register allcoator to
allocate the register instead of doing it at isel time.  This eliminates a ton
of copies around common inline asms.  For example:

int test2(int Y, int X) {
  asm("foo %0, %1" : "=r"(X): "r"(X));
  return X;
}

now compiles to:

_test2:
        foo r3, r4
        blr

instead of:

_test2:
        mr r2, r4
        foo r2, r2
        mr r3, r2
        blr

GCC produces:

_test2:
        foo r4, r4
        mr r3,r4
        blr

llvm-svn: 31366

llvm-svn: 31364

Two-address instructions no longer have to be A := A op C. Now any pair of dest / src operands can be tied together.

llvm-svn: 31363

llvm-svn: 31362