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Enable synthesis of FLOG2 and FEXP2 SelectionDAG nodes from libm calls. These are already marked as illegal by default.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146623 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson 2011-12-15 00:54:12 +00:00
parent 7d1ff37118
commit 4e0adfa7f7
1 changed files with 22 additions and 0 deletions
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22
lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
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@ -5631,6 +5631,28 @@ void SelectionDAGBuilder::visitCall(const CallInst &I) {
Tmp.getValueType(), Tmp));
return;
}
} else if ((LibInfo->has(LibFunc::log2) && Name == "log2") ||
(LibInfo->has(LibFunc::log2f) && Name == "log2f") ||
(LibInfo->has(LibFunc::log2l) && Name == "log2l")) {
if (I.getNumArgOperands() == 1 && // Basic sanity checks.
I.getArgOperand(0)->getType()->isFloatingPointTy() &&
I.getType() == I.getArgOperand(0)->getType()) {
SDValue Tmp = getValue(I.getArgOperand(0));
setValue(&I, DAG.getNode(ISD::FLOG2, getCurDebugLoc(),
Tmp.getValueType(), Tmp));
return;
}
} else if ((LibInfo->has(LibFunc::exp2) && Name == "exp2") ||
(LibInfo->has(LibFunc::exp2f) && Name == "exp2f") ||
(LibInfo->has(LibFunc::exp2l) && Name == "exp2l")) {
if (I.getNumArgOperands() == 1 && // Basic sanity checks.
I.getArgOperand(0)->getType()->isFloatingPointTy() &&
I.getType() == I.getArgOperand(0)->getType()) {
SDValue Tmp = getValue(I.getArgOperand(0));
setValue(&I, DAG.getNode(ISD::FEXP2, getCurDebugLoc(),
Tmp.getValueType(), Tmp));
return;
}
} else if (Name == "memcmp") {
if (visitMemCmpCall(I))
return;