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A hack to fix a problem folding immedaites. This fixes Olden/power.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23126 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-08-29 01:01:01 +00:00
parent 2a06a5ef36
commit 2fef809b5b
1 changed files with 8 additions and 4 deletions
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12
lib/Target/PowerPC/PPCISelDAGToDAG.cpp
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@ -685,16 +685,20 @@ SDOperand PPC32DAGToDAGISel::Select(SDOperand Op) {
unsigned v = (unsigned)cast<ConstantSDNode>(N)->getValue();
unsigned Hi = HA16(v);
unsigned Lo = Lo16(v);
// NOTE: This doesn't use SelectNodeTo, because doing that will prevent
// folding shared immediates into other the second instruction that
// uses it.
if (Hi && Lo) {
SDOperand Top = CurDAG->getTargetNode(PPC::LIS, MVT::i32,
getI32Imm(v >> 16));
CurDAG->SelectNodeTo(N, PPC::ORI, MVT::i32, Top, getI32Imm(v & 0xFFFF));
return CurDAG->getTargetNode(PPC::ORI, MVT::i32, Top,
getI32Imm(v & 0xFFFF));
} else if (Lo) {
CurDAG->SelectNodeTo(N, PPC::LI, MVT::i32, getI32Imm(v));
return CurDAG->getTargetNode(PPC::LI, MVT::i32, getI32Imm(v));
} else {
CurDAG->SelectNodeTo(N, PPC::LIS, MVT::i32, getI32Imm(v >> 16));
return CurDAG->getTargetNode(PPC::LIS, MVT::i32, getI32Imm(v >> 16));
}
break;
}
case ISD::UNDEF:
if (N->getValueType(0) == MVT::i32)