llvm-svn: 23110

changes the code generated for:

short %test(short %A) {
  %B = xor short %A, -32768
  ret short %B
}

to:

_test:
        xori r2, r3, 32768
        xoris r2, r2, 65535
        extsh r3, r2
        blr

instead of:

_test:
        rlwinm r2, r3, 0, 16, 31
        xori r2, r3, 32768
        xoris r2, r2, 65535
        extsh r3, r2
        blr

llvm-svn: 23109

llvm-svn: 23108

llvm-svn: 23107

llvm-svn: 23106

llvm-svn: 23105

  * avoid calling getClass() multiple times (it is relatively expensive)
  * Allow -disable-fp-elim to turn of frame pointer elimination.

llvm-svn: 23104

register class.

llvm-svn: 23103

llvm-svn: 23101

llvm-svn: 23100

llvm-svn: 23099

flag is set on an instruction.

llvm-svn: 23098

llvm-svn: 23097

llvm-svn: 23096

llvm-svn: 23095

llvm-svn: 23094

llvm-svn: 23093

llvm-svn: 23092

giving it a non-instruction opcode.  The dag->dag selector used to not
select the operands of the fsel, because it thought that whole tree was
already selected.

llvm-svn: 23091

llvm-svn: 23090

bool %test(int %X, int %Y) {
        %C = setne int %X, 0
        ret bool %C
}

to:

_test:
        addic r2, r3, -1
        subfe r3, r2, r3
        blr

llvm-svn: 23089

just return its input, instead of emitting an explicit copy.

llvm-svn: 23088

llvm-svn: 23087

llvm-svn: 23086

llvm-svn: 23085

llvm-svn: 23084

when the RHS of the comparison is 0.0.  Turn this on by default.

llvm-svn: 23083

llvm-svn: 23082

putting it into the constant pool.  This allows the isel machinery to
create constants that it will end up deciding are not needed, without them
ending up in the resultant function constant pool.

llvm-svn: 23081

llvm-svn: 23080

every other SD API.  Fix it to take the opcode before the types.

llvm-svn: 23079

llvm-svn: 23078

llvm-svn: 23077

llvm-svn: 23076

instead of in the backend.  This currently handles fsel cases with registers,
but doesn't have the 0.0 and -0.0 optimization enabled yet.

Once this is finished, special hack for fp immediates can go away.

llvm-svn: 23075

llvm-svn: 23074

llvm-svn: 23073

llvm-svn: 23072

llvm-svn: 23071

some things given to it, but not all.

llvm-svn: 23070