llvm-svn: 38535

llvm-svn: 38516

_GLIBCXX_DEBUG.

llvm-svn: 37793

llvm-svn: 37633

llvm-svn: 37511

is too slow.

llvm-svn: 37509

llvm-svn: 37427

llvm-svn: 37408

llvm-svn: 37394

See test/CodeGen/X86/test-pic-jtbl.ll for a case where it works well;
shaves another 10K off our favorite benchmark.  I was hesitant about
this because of compile speed, but seems to do OK on a bootstrap.

llvm-svn: 37392

Do not remove empty landing pads (EH table needs to be updated)

llvm-svn: 37375

llvm-svn: 37355

matter until my last change).  Reenable tail merging by default.

llvm-svn: 37354

only one successor.

llvm-svn: 37324

Temporarily, this breaks CodeGen/Generic/2006-02-12-InsertLibraryCall.ll
by exposing an unrelated latent problem; working on that.

llvm-svn: 37323

When considering blocks with more than 2 predecessors, merge the block with
the largest number of matching insns, rather than the first block found.
Considering that 1 matching insn is enough to show a win for candidates that
already end with a branch.

llvm-svn: 37315

for a target-dependent default with a command-line override; this way
should be generally usable.

llvm-svn: 37285

llvm-svn: 37198

llvm-svn: 37089

failures on PPC (can happen only when prologue code is null)

llvm-svn: 36979

llvm-svn: 36966

llvm-svn: 36907

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: 36602

llvm-svn: 35226

llvm-svn: 34497

llvm-svn: 34476

llvm-svn: 34359

for debugging and exception handling.

llvm-svn: 33550

llvm-svn: 33537

llvm-svn: 32698

is 'unsigned'.

llvm-svn: 32279

simplified before we do this xform so that our cost model is accurate.

llvm-svn: 31864

llvm-svn: 31861

This speeds up yacr2 by 7% on a core2.

llvm-svn: 31856

  if (cond) goto BB2
BB1:
    ...
    return;
BB2:
   ...

Move BB1 to the end of the function so that the code falls through in the
non-return case.  This has the effect of moving assert (and other no-return
call) bodies and return blocks out of loops.

llvm-svn: 31855

LBB1_57:        #bb207.i
        movl 72(%esp), %ecx
        movb (%ecx,%eax), %cl
        movl 80(%esp), %edx
        movb %cl, 1(%edx,%eax)
        incl %eax
        cmpl $143, %eax
        jne LBB1_57     #bb207.i
        jmp LBB1_64     #cond_next255.i

intead of:

LBB1_57:        #bb207.i
        movl 72(%esp), %ecx
        movb (%ecx,%eax), %cl
        movl 80(%esp), %edx
        movb %cl, 1(%edx,%eax)
        incl %eax
        cmpl $143, %eax
        je LBB1_64      #cond_next255.i
        jmp LBB1_57     #bb207.i

This eliminates a branch per iteration of the loop.  This hurted PPC
particularly, because the extra branch meant another dispatch group for each
iteration of the loop.

llvm-svn: 31530

llvm-svn: 31464