is 'unsigned'.

llvm-svn: 32279

llvm-svn: 31923

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

Eliminate ConstantBool::True and ConstantBool::False.  Instead, provide
ConstantBool::getTrue() and ConstantBool::getFalse().

llvm-svn: 30665

exit blocks. The output is dependent on addresses of basic block.

Add and use Loop::getUniqueExitBlocks.

llvm-svn: 29966

llvm-svn: 29925

somewhere down the road.

llvm-svn: 29197

will be profitable.  This is mainly to remove some cases where excessive
unswitching would result in long compile times and/or huge generated code.

Once someone comes up with a better heuristic that avoids these cases, this
should be switched out.

llvm-svn: 28962

blocks.

llvm-svn: 28959

Be more careful when updating Phi nodes after eliminating dead switch cases.  Fix
proposed by Chris.

llvm-svn: 28947

of LCSSA.  This results several times the number of unswitchings occurring on
tests such and timberwolfmc, unix-tbl, and ldecod.

llvm-svn: 28912

bug exposed by the recent lcssa work.

llvm-svn: 28779

llvm-svn: 28759

Back out Owen's 6/9 changes. They broke MultiSource/Benchmarks/Prolangs-C/bison (and perhaps others).

llvm-svn: 28747

LCSSA.

llvm-svn: 28739

llvm-svn: 27051

caused SPASS to fail building last night.

We can't trivially unswitch a loop if the exit block has phi nodes in it,
because we don't know which predecessor to use.

llvm-svn: 26320

to rewrite with the wrong value.

llvm-svn: 26311

llvm-svn: 26289

llvm-svn: 26285

Thanks to nate for pointing this out :)

llvm-svn: 26280

llvm-svn: 26279

the right loop.

llvm-svn: 26277

llvm-svn: 26258

risk :)

llvm-svn: 26248

Change SplitBlock to increment a BasicBlock::iterator, not an Instruction*.  Apparently they do different things :)

This fixes a testcase that nate reduced from spass.

Also included are a couple minor code changes that don't affect the generated
code at all.

llvm-svn: 26235

llvm-svn: 26228

llvm-svn: 26225

unswitch this loop on 2 before sweating to unswitch on 1/3.

void test4(int N, int i, int C, int*P, int*Q) {
  int j;
  for (j = 0; j < N; ++j) {
    switch (C) {                // general unswitching.
    default: P[i+j] = 0; break;
    case 1: Q[i+j] = 0; break;
    case 3: P[i+j] = Q[i+j]; break;
    case 2: break;              //  TRIVIAL UNSWITCH on C==2
    }
  }
}

llvm-svn: 26223

this for example:

  for (j = 0; j < N; ++j) {     // trivial unswitch
    if (C)
      P[i+j] = 0;
  }

turning it into the obvious code without bothering to duplicate an empty loop.

llvm-svn: 26220

Y = seteq bool X, true
instead of just using X :)

llvm-svn: 26215

llvm-svn: 26194

llvm-svn: 26191

llvm-svn: 26157

llvm-svn: 26114

llvm-svn: 26113

llvm-svn: 26112

phi's in the successors

llvm-svn: 26108

with branches on partially invariant computations.

llvm-svn: 26104

llvm-svn: 26103