From 4e0adfa7f7fa5617a7a06028cdad0e4a50cac22a Mon Sep 17 00:00:00 2001 From: Owen Anderson Date: Thu, 15 Dec 2011 00:54:12 +0000 Subject: [PATCH] Enable synthesis of FLOG2 and FEXP2 SelectionDAG nodes from libm calls. These are already marked as illegal by default. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146623 91177308-0d34-0410-b5e6-96231b3b80d8 --- .../SelectionDAG/SelectionDAGBuilder.cpp | 22 +++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp index d10fa4686cd..68c95149904 100644 --- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp +++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp @@ -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; -- 2.34.1