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[SystemZ] Use SRST to implement strlen and strnlen

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It would also make sense to use it for memchr; I'm working on that now.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188547 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Richard Sandiford
2013-08-16 11:41:43 +00:00
parent 4fc7355a21
commit 19262ee072
14 changed files with 236 additions and 1 deletions
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2
include/llvm/Target/TargetLibraryInfo.h
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@@ -700,7 +700,7 @@ public:
case LibFunc::log2: case LibFunc::log2f: case LibFunc::log2l:
case LibFunc::exp2: case LibFunc::exp2f: case LibFunc::exp2l:
case LibFunc::memcmp: case LibFunc::strcmp: case LibFunc::strcpy:
case LibFunc::stpcpy:
case LibFunc::stpcpy: case LibFunc::strlen: case LibFunc::strnlen:
return true;
}
return false;

13
include/llvm/Target/TargetSelectionDAGInfo.h
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@@ -137,6 +137,19 @@ public:
MachinePointerInfo Op2PtrInfo) const {
return std::make_pair(SDValue(), SDValue());
}
virtual std::pair<SDValue, SDValue>
EmitTargetCodeForStrlen(SelectionDAG &DAG, SDLoc DL, SDValue Chain,
SDValue Src, MachinePointerInfo SrcPtrInfo) const {
return std::make_pair(SDValue(), SDValue());
}
virtual std::pair<SDValue, SDValue>
EmitTargetCodeForStrnlen(SelectionDAG &DAG, SDLoc DL, SDValue Chain,
SDValue Src, SDValue MaxLength,
MachinePointerInfo SrcPtrInfo) const {
return std::make_pair(SDValue(), SDValue());
}
};
} // end llvm namespace