Evan Cheng 53696b7e9f 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

2007-10-26 01:56:11 +00:00

..

Alpha

…

ARM

Fix memcpy lowering when addresses are 4-byte aligned but size is not multiple of 4.

2007-10-22 22:11:27 +00:00

CBackend

Change all floating constants that are not exactly

2007-09-05 17:50:36 +00:00

Generic

-pre-RA-sched=none, simple, simple-noitin are gone.

2007-10-01 22:17:20 +00:00

IA64

…

PowerPC

If there's an unaligned memcpy to/from the stack, don't lower it. Just call the

2007-10-23 23:32:40 +00:00

SPARC

…

X86

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.

2007-10-26 01:56:11 +00:00