llvm-svn: 43384

registers in case, when FP pointer was eliminated. This should fixes misc. random
EH-related crahses, when stuff is compiled with -fomit-frame-pointer.
Thanks Duncan for nailing this bug!

llvm-svn: 43381

want them later (mips32/64).

llvm-svn: 43380

llvm-svn: 43379

improved wording in source files.

llvm-svn: 43377

Loosen up iv reuse to allow reuse of the same stride but a larger type when truncating from the larger type to smaller type is free.
e.g.
Turns this loop:
LBB1_1: # entry.bb_crit_edge
        xorl    %ecx, %ecx
        xorw    %dx, %dx
        movw    %dx, %si
LBB1_2: # bb
        movl    L_X$non_lazy_ptr, %edi
        movw    %si, (%edi)
        movl    L_Y$non_lazy_ptr, %edi
        movw    %dx, (%edi)
		addw    $4, %dx
		incw    %si
		incl    %ecx
		cmpl    %eax, %ecx
		jne     LBB1_2  # bb
	
into

LBB1_1: # entry.bb_crit_edge
        xorl    %ecx, %ecx
        xorw    %dx, %dx
LBB1_2: # bb
        movl    L_X$non_lazy_ptr, %esi
        movw    %cx, (%esi)
        movl    L_Y$non_lazy_ptr, %esi
        movw    %dx, (%esi)
        addw    $4, %dx
		incl    %ecx
        cmpl    %eax, %ecx
        jne     LBB1_2  # bb

llvm-svn: 43375

llvm-svn: 43374

pointers that employ unused bits in a pointer to store extra data.

llvm-svn: 43373

Silenced VC++ warning.

llvm-svn: 43372

llvm-svn: 43369

stride may be rewritten using the stride of the compare instruction.

llvm-svn: 43367

llvm-svn: 43364

llvm-svn: 43359

llvm-svn: 43357

llvm-svn: 43356

llvm-svn: 43353

Use NVT rather than looking it up, since we have
it to hand.

llvm-svn: 43341

llvm-svn: 43340

llvm-svn: 43339

and the compaison is against a constant value, try eliminate the stride
by moving the compare instruction to another stride and change its
constant operand accordingly. e.g.

loop:
...
v1 = v1 + 3
v2 = v2 + 1
if (v2 < 10) goto loop
=>
loop:
...
v1 = v1 + 3
if (v1 < 30) goto loop

llvm-svn: 43336

llvm-svn: 43326

for backpatching.

Added Deserialize::ReadVal.

llvm-svn: 43319

llvm-svn: 43314

llvm-svn: 43309

Deserialize.h Serialization.h now includes trait speciailizations for
unsigned long, etc.

llvm-svn: 43307

llvm-svn: 43305

implementing cases related to PR1738.

llvm-svn: 43289

llvm-svn: 43271

memcpy library function instead.

llvm-svn: 43270

llvm-svn: 43267

llvm-svn: 43264

have their own custom memcpy lowering code. This code needs to be factored out
into a target-independent lowering method with hooks to the backend. In the
meantime, just call memcpy if we're trying to copy onto a stack.

llvm-svn: 43262

llvm-svn: 43261

llvm-svn: 43259

llvm-svn: 43256

llvm-svn: 43249

Temporary solution: added a different set of BCTRL_Macho / BCTRL_ELF with right callee-saved defs set for ppc64.

llvm-svn: 43248

llvm-svn: 43234

llvm-svn: 43232

 - Avoid attempting stride-reuse in the case that there are users that
   aren't addresses. In that case, there will be places where the
   multiplications won't be folded away, so it's better to try to
   strength-reduce them.

 - Several SSE intrinsics have operands that strength-reduction can
   treat as addresses. The previous item makes this more visible, as
   any non-address use of an IV can inhibit stride-reuse.

 - Make ValidStride aware of whether there's likely to be a base
   register in the address computation. This prevents it from thinking
   that things like stride 9 are valid on x86 when the base register is
   already occupied.

Also, XFAIL the 2007-08-10-LEA16Use32.ll test; the new logic to avoid
stride-reuse elimintes the LEA in the loop, so the test is no longer
testing what it was intended to test.

llvm-svn: 43231