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Teach the dag isel generator how to construct arbitrary immediates. The

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generated isel now tries li then lis, then lis+ori.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23418 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-09-24 00:41:58 +00:00
parent 72fe91c4dd
commit ea874f3306
1 changed files with 6 additions and 1 deletions
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7
lib/Target/PowerPC/PPCInstrInfo.td
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@ -774,7 +774,12 @@ def : Pat<(or GPRC:$in, imm:$imm),
def : Pat<(xor GPRC:$in, imm:$imm), def : Pat<(xor GPRC:$in, imm:$imm),
(XORIS (XORI GPRC:$in, (LO16 imm:$imm)), (HI16 imm:$imm))>; (XORIS (XORI GPRC:$in, (LO16 imm:$imm)), (HI16 imm:$imm))>;
// Same as above, but using a temporary. // Arbitrary immediate support.
def : Pat<(i32 imm:$imm),
(ORI (LIS (HI16 imm:$imm)), (LO16 imm:$imm))>;
// Same as above, but using a temporary. FIXME: implement temporaries :)
/* /*
def : Pattern<(xor GPRC:$in, imm:$imm), def : Pattern<(xor GPRC:$in, imm:$imm),
[(set GPRC:$tmp, (XORI GPRC:$in, (LO16 imm:$imm))), [(set GPRC:$tmp, (XORI GPRC:$in, (LO16 imm:$imm))),