Changes in directory llvm/lib/Target/IA64:
IA64ISelDAGToDAG.cpp updated: 1.3 -> 1.4 --- Log message: FORTRAN!!! :( and other similarly unfortunate things mean that on ia64 one sometimes needs to pass FP args in both FP *and* integer registers. --- Diffs of the changes: (+20 -0) IA64ISelDAGToDAG.cpp | 20 ++++++++++++++++++++ 1 files changed, 20 insertions(+) Index: llvm/lib/Target/IA64/IA64ISelDAGToDAG.cpp diff -u llvm/lib/Target/IA64/IA64ISelDAGToDAG.cpp:1.3 llvm/lib/Target/IA64/IA64ISelDAGToDAG.cpp:1.4 --- llvm/lib/Target/IA64/IA64ISelDAGToDAG.cpp:1.3 Sat Oct 29 11:08:30 2005 +++ llvm/lib/Target/IA64/IA64ISelDAGToDAG.cpp Mon Oct 31 23:46:16 2005 @@ -208,7 +208,13 @@ CallOpcode = IA64::BRCALL_INDIRECT; } + // see section 8.5.8 of "Itanium Software Conventions and + // Runtime Architecture Guide to see some examples of what's going + // on here. (in short: int args get mapped 1:1 'slot-wise' to out0->out7, + // while FP args get mapped to F8->F15 as needed) + // TODO: support in-memory arguments + unsigned used_FPArgs=0; // how many FP args have been used so far? unsigned intArgs[] = {IA64::out0, IA64::out1, IA64::out2, IA64::out3, @@ -236,6 +242,20 @@ Chain = CurDAG->getCopyToReg(Chain, DestReg, Val, InFlag); InFlag = Chain.getValue(1); CallOperands.push_back(CurDAG->getRegister(DestReg, RegTy)); + // some functions (e.g. printf) want floating point arguments + // *also* passed as in-memory representations in integer registers + // this is FORTRAN legacy junk which we don't _always_ need + // to do, but to be on the safe side, we do. + if(MVT::isFloatingPoint(N->getOperand(i).getValueType())) { + assert((i-2) < 8 && "FP args alone would fit, but no int regs left"); + DestReg = intArgs[i-2]; // this FP arg goes in an int reg + // GETFD takes an FP reg and writes a GP reg + Chain = CurDAG->getTargetNode(IA64::GETFD, MVT::i64, Val, InFlag); + // FIXME: this next line is a bit unfortunate + Chain = CurDAG->getCopyToReg(Chain, DestReg, Chain, InFlag); + InFlag = Chain.getValue(1); + CallOperands.push_back(CurDAG->getRegister(DestReg, MVT::i64)); + } } } _______________________________________________ llvm-commits mailing list llvm-commits@cs.uiuc.edu http://lists.cs.uiuc.edu/mailman/listinfo/llvm-commits