commit 15045b6973bfe7a5adda8c0fb53bb1b0cdc06b8d
author Chris Lattner <sabre@nondot.org> Tue Feb 28 06:35:35 2006 +0000
committer Chris Lattner <sabre@nondot.org> Tue Feb 28 06:35:35 2006 +0000
tree 2ed0170d05d3187715e94467bed3460c3c05e250
parent 71d9ebcbc1c74848372e11c96989ede974b2366d

Fold "and (LOAD P), 255" -> zextload.  This allows us to compile:

unsigned foo3(unsigned *P) { return *P & 255; }
as:
_foo3:
        lbz r3, 3(r3)
        blr

instead of:

_foo3:
        lwz r2, 0(r3)
        rlwinm r3, r2, 0, 24, 31
        blr

and:

unsigned short foo2(float a) { return a; }

as:
_foo2:
        fctiwz f0, f1
        stfd f0, -8(r1)
        lhz r3, -2(r1)
        blr

instead of:

_foo2:
        fctiwz f0, f1
        stfd f0, -8(r1)
        lwz r2, -4(r1)
        rlwinm r3, r2, 0, 16, 31
        blr


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26417 91177308-0d34-0410-b5e6-96231b3b80d8