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learn to codegen not as NOR instead of xoris/xori

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23490 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-09-28 17:13:15 +00:00
parent d135fa4fd6
commit 91da8623be
1 changed files with 5 additions and 1 deletions
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6
lib/Target/PowerPC/PPCInstrInfo.td
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@ -765,7 +765,11 @@ def RLDICR : MDForm_1<30, 1,
// Arbitrary immediate support. Implement in terms of LIS/ORI.
def : Pat<(i32 imm:$imm),
(ORI (LIS (HI16 imm:$imm)), (LO16 imm:$imm))>;
// Implement the 'not' operation with the NOR instruction.
def NOT : Pat<(not GPRC:$in),
(NOR GPRC:$in, GPRC:$in)>;
// or by an arbitrary immediate.
def : Pat<(or GPRC:$in, imm:$imm),
(ORIS (ORI GPRC:$in, (LO16 imm:$imm)), (HI16 imm:$imm))>;