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In TargetLowering::LowerCallTo, don't assert that

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the return value is zero-extended if it isn't
sign-extended.  It may also be any-extended.
Also, if a floating point value was returned
in a larger floating point type, pass 1 as the
second operand to FP_ROUND, which tells it
that all the precision is in the original type.
I think this is right but I could be wrong.
Finally, when doing libcalls, set isZExt on
a parameter if it is "unsigned".  Currently
isSExt is set when signed, and nothing is
set otherwise.  This should be right for all
calls to standard library routines.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47122 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan Sands
2008-02-14 17:28:50 +00:00
parent e179584f9b
commit 00fee65fd2
11 changed files with 62 additions and 38 deletions
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11
lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
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@@ -2862,7 +2862,8 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
}
std::pair<SDOperand,SDOperand> CallResult =
TLI.LowerCallTo(Tmp1, Type::VoidTy, false, false, CallingConv::C, false,
TLI.LowerCallTo(Tmp1, Type::VoidTy,
false, false, false, CallingConv::C, false,
DAG.getExternalSymbol(FnName, IntPtr), Args, DAG);
Result = CallResult.second;
break;
@@ -3963,7 +3964,8 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
Tmp1 = LegalizeOp(Node->getOperand(0));
TargetLowering::ArgListTy Args;
std::pair<SDOperand,SDOperand> CallResult =
TLI.LowerCallTo(Tmp1, Type::VoidTy, false, false, CallingConv::C, false,
TLI.LowerCallTo(Tmp1, Type::VoidTy,
false, false, false, CallingConv::C, false,
DAG.getExternalSymbol("abort", TLI.getPointerTy()),
Args, DAG);
Result = CallResult.second;
@@ -5153,6 +5155,7 @@ SDOperand SelectionDAGLegalize::ExpandLibCall(const char *Name, SDNode *Node,
const Type *ArgTy = MVT::getTypeForValueType(ArgVT);
Entry.Node = Node->getOperand(i); Entry.Ty = ArgTy;
Entry.isSExt = isSigned;
Entry.isZExt = !isSigned;
Args.push_back(Entry);
}
SDOperand Callee = DAG.getExternalSymbol(Name, TLI.getPointerTy());
@@ -5160,8 +5163,8 @@ SDOperand SelectionDAGLegalize::ExpandLibCall(const char *Name, SDNode *Node,
// Splice the libcall in wherever FindInputOutputChains tells us to.
const Type *RetTy = MVT::getTypeForValueType(Node->getValueType(0));
std::pair<SDOperand,SDOperand> CallInfo =
TLI.LowerCallTo(InChain, RetTy, isSigned, false, CallingConv::C, false,
Callee, Args, DAG);
TLI.LowerCallTo(InChain, RetTy, isSigned, !isSigned, false, CallingConv::C,
false, Callee, Args, DAG);
// Legalize the call sequence, starting with the chain. This will advance
// the LastCALLSEQ_END to the legalized version of the CALLSEQ_END node that