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Revert my last couple of patches. They appear to have broken bison.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94841 91177308-0d34-0410-b5e6-96231b3b80d8
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@@ -1203,6 +1203,9 @@ struct MemMoveChkOpt : public LibCallOptimization {
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struct StrCpyChkOpt : public LibCallOptimization {
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virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
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// These optimizations require TargetData.
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if (!TD) return 0;
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const FunctionType *FT = Callee->getFunctionType();
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if (FT->getNumParams() != 3 || FT->getReturnType() != FT->getParamType(0) ||
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!isa<PointerType>(FT->getParamType(0)) ||
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@@ -1214,13 +1217,8 @@ struct StrCpyChkOpt : public LibCallOptimization {
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if (!SizeCI)
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return 0;
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// If a) we don't have any length information, or b) we know this will
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// fit then just lower to a plain strcpy. Otherwise we'll keep our
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// strcpy_chk call which may fail at runtime if the size is too long.
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// TODO: It might be nice to get a maximum length out of the possible
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// string lengths for varying.
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if (SizeCI->isAllOnesValue() ||
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SizeCI->getZExtValue() >= GetStringLength(CI->getOperand(2)))
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// We don't have any length information, just lower to a plain strcpy.
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if (SizeCI->isAllOnesValue())
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return EmitStrCpy(CI->getOperand(1), CI->getOperand(2), B);
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return 0;
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