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[CodeGen] Report error rather than crash when unable to makeLibCall.

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Also, make the assumption explicit in the header.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@233329 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Ahmed Bougacha 2015-03-26 22:46:58 +00:00
parent 5cb4112882
commit f55b1a5be4
2 changed files with 3 additions and 0 deletions
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1
include/llvm/Target/TargetLowering.h
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@ -2030,6 +2030,7 @@ public:
ISD::CondCode &CCCode, SDLoc DL) const;
/// Returns a pair of (return value, chain).
/// It is an error to pass RTLIB::UNKNOWN_LIBCALL as \p LC.
std::pair<SDValue, SDValue> makeLibCall(SelectionDAG &DAG, RTLIB::Libcall LC,
EVT RetVT, const SDValue *Ops,
unsigned NumOps, bool isSigned,

2
lib/CodeGen/SelectionDAG/TargetLowering.cpp
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@ -100,6 +100,8 @@ TargetLowering::makeLibCall(SelectionDAG &DAG,
Entry.isZExt = !shouldSignExtendTypeInLibCall(Ops[i].getValueType(), isSigned);
Args.push_back(Entry);
}
if (LC == RTLIB::UNKNOWN_LIBCALL)
report_fatal_error("Unsupported library call operation!");
SDValue Callee = DAG.getExternalSymbol(getLibcallName(LC), getPointerTy());
Type *RetTy = RetVT.getTypeForEVT(*DAG.getContext());