llvm-svn: 44299

llvm-svn: 43642

llvm-svn: 43420

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

for fastcc from X86CallingConv.td.  This means that nested functions
are not supported for calling convention 'fastcc'.

llvm-svn: 42934

llvm-svn: 42922

enabled by passing -tailcallopt to llc.  The optimization is
performed if the following conditions are satisfied:
* caller/callee are fastcc
* elf/pic is disabled OR
  elf/pic enabled + callee is in module + callee has
  visibility protected or hidden

llvm-svn: 42870

llvm-svn: 42785

llvm-svn: 42656

llvm-svn: 42607

llvm-svn: 42579

seem significant as well.

llvm-svn: 42564

llvm-svn: 42554

llvm-svn: 42552

llvm-svn: 42547

llvm-svn: 42546

llvm-svn: 42347

llvm-svn: 41810

llvm-svn: 41808

llvm-svn: 41319

llvm-svn: 41178

llvm-svn: 41021

able to 3-addressify away stuff like this:

        movl    %ecx, %eax
        decl    %eax

llvm-svn: 41020

llvm-svn: 41013

Increase efficiency of sign_extend_inreg by using subregisters for truncation. As the README suggests sign_extend_subreg is selected to (sext(trunc)).

llvm-svn: 41010

llvm-svn: 41009

llvm-svn: 40772

llvm-svn: 40028

llvm-svn: 39998

llvm-svn: 39977

llvm-svn: 37239

llvm-svn: 36965

llvm-svn: 36799

llvm-svn: 36185

llvm-svn: 36028

llvm-svn: 35884

llvm-svn: 35867

llvm-svn: 35637

llvm-svn: 35634

llvm-svn: 35435