llvm-svn: 16864

llvm-svn: 16863

llvm-svn: 16862

llvm-svn: 16861

the -sse* options (to avoid misleading people).

Also, the stack alignment of the target doesn't depend on whether SSE is
eventually implemented, so remove a comment.

llvm-svn: 16860

which prevented setcc's from being folded into branches.  It appears that
conditional branchinst's CC operand is actually operand(2), not operand(0)
as we might expect. :(

llvm-svn: 16859

llvm-svn: 16858

* Do not lead dangling dead constants prevent optimization
* Iterate global optimization while we're making progress.

These changes allow us to be more aggressive, handling cases like
GlobalOpt/iterate.llx without a problem (turning it into 'ret int 0').

llvm-svn: 16857

llvm-svn: 16856

we know it is dead.

llvm-svn: 16855

llvm-svn: 16854

254.gap.

llvm-svn: 16853

llvm-svn: 16852

llvm-svn: 16851

llvm-svn: 16850

llvm-svn: 16849

llvm-svn: 16848

llvm-svn: 16847

* Rename library to mark it SparcV9-specific

llvm-svn: 16846

llvm-svn: 16845

llvm-svn: 16844

llvm-svn: 16843

optimizations to trigger much more often.  This allows the elimination of
several dozen more global variables in Programs/External.  Note that we only
do this for non-constant globals: constant globals will already be optimized
out if the accesses to them permit it.

This implements Transforms/GlobalOpt/globalsra.llx

llvm-svn: 16842

llvm-svn: 16841

instcombine xform, which is why we didn't notice it before.

llvm-svn: 16840

it cannot be folded in.

llvm-svn: 16839

llvm-svn: 16838

version of the configure script. This is an early commit of the automake
support so that automake support can be tested on multiple platforms. Many
additional Makefile.am need to be added to LLVM before this is of any use.
Please wait until automake support is announced on llvmdev list before
using the --with-automake option.

llvm-svn: 16837

This comes up when doing adds to bitfield elements.

llvm-svn: 16836

llvm-svn: 16835

This triggers in cases of bitfield additions, opening opportunities for
future improvements.

llvm-svn: 16834

llvm-svn: 16833

of one or more 1 bits (may wrap from least significant bit to most
significant bit) as the rlwinm rather than andi., andis., or some longer
instructons sequence.

int andn4(int z) { return z & -4; }
int clearhi(int z) { return z & 0x0000FFFF; }
int clearlo(int z) { return z & 0xFFFF0000; }
int clearmid(int z) { return z & 0x00FFFF00; }
int clearwrap(int z) { return z & 0xFF0000FF; }

_andn4:
        rlwinm r3, r3, 0, 0, 29
        blr

_clearhi:
        rlwinm r3, r3, 0, 16, 31
        blr

_clearlo:
        rlwinm r3, r3, 0, 0, 15
        blr

_clearmid:
        rlwinm r3, r3, 0, 8, 23
        blr

_clearwrap:
        rlwinm r3, r3, 0, 24, 7
        blr

llvm-svn: 16832

llvm-svn: 16831

llvm-svn: 16830

llvm-svn: 16829

* Add missing <li> tags

llvm-svn: 16828

1. Fix an illegal argument to getClassB when deciding whether or not to
   sign extend a byte load.

2. Initial addition of isLoad and isStore flags to the instruction .td file
   for eventual use in a scheduler.

3. Rewrite of how constants are handled in emitSimpleBinaryOperation so
   that we can emit the PowerPC shifted immediate instructions far more
   often.  This allows us to emit the following code:

int foo(int x) { return x | 0x00F0000; }

_foo:
.LBB_foo_0:     ; entry
        ; IMPLICIT_DEF
        oris r3, r3, 15
        blr

llvm-svn: 16826

loading a 32bit constant into a register whose low halfword is all zeroes.

We now omit the ori after the lis for the following C code:

int bar(int y) { return y * 0x00F0000; }

_bar:
.LBB_bar_0:     ; entry
        ; IMPLICIT_DEF
        lis r2, 15
        mullw r3, r3, r2
        blr

llvm-svn: 16825

llvm-svn: 16824