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Add bswap, rotl, and rotr nodes

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Add dag combiner code to recognize rotl, rotr
Add ppc code to match rotl

Targets should add rotl/rotr patterns if they have them


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25222 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nate Begeman
2006-01-11 21:21:00 +00:00
parent a243db8c41
commit 35ef913ec2
12 changed files with 95 additions and 7 deletions
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3
lib/Target/PowerPC/PPCISelLowering.cpp
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@@ -68,6 +68,9 @@ PPCTargetLowering::PPCTargetLowering(TargetMachine &TM)
setOperationAction(ISD::CTPOP, MVT::i32 , Expand);
setOperationAction(ISD::CTTZ , MVT::i32 , Expand);
// PowerPC does not have ROTR
setOperationAction(ISD::ROTR, MVT::i32 , Expand);
// PowerPC does not have Select
setOperationAction(ISD::SELECT, MVT::i32, Expand);
setOperationAction(ISD::SELECT, MVT::f32, Expand);

9
lib/Target/PowerPC/PPCInstrInfo.td
View File

@@ -982,9 +982,6 @@ def : Pat<(or GPRC:$in, imm:$imm),
// XOR an arbitrary immediate.
def : Pat<(xor GPRC:$in, imm:$imm),
(XORIS (XORI GPRC:$in, (LO16 imm:$imm)), (HI16 imm:$imm))>;
def : Pat<(or (shl GPRC:$rS, GPRC:$rB),
(srl GPRC:$rS, (sub 32, GPRC:$rB))),
(RLWNM GPRC:$rS, GPRC:$rB, 0, 31)>;
// Return void support.
def : Pat<(ret), (BLR)>;
@@ -1008,6 +1005,12 @@ def : Pat<(srl GPRC:$in, (i32 imm:$imm)),
def : Pat<(srl G8RC:$in, (i64 imm:$imm)),
(RLDICL G8RC:$in, (SRL64 imm:$imm), imm:$imm)>;
// ROTL
def : Pat<(rotl GPRC:$in, GPRC:$sh),
(RLWNM GPRC:$in, GPRC:$sh, 0, 31)>;
def : Pat<(rotl GPRC:$in, (i32 imm:$imm)),
(RLWINM GPRC:$in, imm:$imm, 0, 31)>;
// Hi and Lo for Darwin Global Addresses.
def : Pat<(PPChi tglobaladdr:$in, 0), (LIS tglobaladdr:$in)>;
def : Pat<(PPClo tglobaladdr:$in, 0), (LI tglobaladdr:$in)>;