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added all flavors of zap for anding

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21276 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andrew Lenharth 2005-04-13 03:47:03 +00:00
parent ffe284c651
commit 483f22d817
1 changed files with 20 additions and 0 deletions
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20
lib/Target/Alpha/AlphaISelPattern.cpp
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@ -1692,6 +1692,26 @@ unsigned ISel::SelectExpr(SDOperand N) {
}
//Fall through
case ISD::AND:
//handle zap
if (opcode == ISD::AND && N.getOperand(1).getOpcode() == ISD::Constant)
{
uint64_t k = cast<ConstantSDNode>(N.getOperand(1))->getValue();
unsigned int build = 0;
for(int i = 0; i < 8; ++i)
{
if (k & 0xFF == 0xFF)
build |= 1 << i;
else if (k & 0xFF != 0)
{ build = 0; break; }
k >>= 8;
}
if (build)
{
Tmp1 = SelectExpr(N.getOperand(0));
BuildMI(BB, Alpha::ZAPNOTi, 2, Result).addReg(Tmp1).addImm(build);
return Result;
}
}
case ISD::OR:
//Check operand(0) == Not
if (N.getOperand(0).getOpcode() == ISD::XOR &&