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Use early returns to reduce indentation.

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llvm-svn: 234057
This commit is contained in:
David Blaikie 2015-04-03 21:32:06 +00:00
parent 2af32ca579
commit 061faafe3e
1 changed files with 18 additions and 18 deletions
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36
lib/Transforms/Utils/SimplifyLibCalls.cpp
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@ -2284,25 +2284,25 @@ Value *FortifiedLibCallSimplifier::optimizeStrpCpyChk(CallInst *CI,
// st[rp]cpy_chk call which may fail at runtime if the size is too long.
// TODO: It might be nice to get a maximum length out of the possible
// string lengths for varying.
if (isFortifiedCallFoldable(CI, 2, 1, true)) {
Value *Ret = EmitStrCpy(Dst, Src, B, TLI, Name.substr(2, 6));
return Ret;
} else if (!OnlyLowerUnknownSize) {
// Maybe we can stil fold __st[rp]cpy_chk to __memcpy_chk.
uint64_t Len = GetStringLength(Src);
if (Len == 0)
return nullptr;
if (isFortifiedCallFoldable(CI, 2, 1, true))
return EmitStrCpy(Dst, Src, B, TLI, Name.substr(2, 6));
Type *SizeTTy = DL.getIntPtrType(CI->getContext());
Value *LenV = ConstantInt::get(SizeTTy, Len);
Value *Ret = EmitMemCpyChk(Dst, Src, LenV, ObjSize, B, DL, TLI);
// If the function was an __stpcpy_chk, and we were able to fold it into
// a __memcpy_chk, we still need to return the correct end pointer.
if (Ret && Func == LibFunc::stpcpy_chk)
return B.CreateGEP(B.getInt8Ty(), Dst, ConstantInt::get(SizeTTy, Len - 1));
return Ret;
}
return nullptr;
if (OnlyLowerUnknownSize)
return nullptr;
// Maybe we can stil fold __st[rp]cpy_chk to __memcpy_chk.
uint64_t Len = GetStringLength(Src);
if (Len == 0)
return nullptr;
Type *SizeTTy = DL.getIntPtrType(CI->getContext());
Value *LenV = ConstantInt::get(SizeTTy, Len);
Value *Ret = EmitMemCpyChk(Dst, Src, LenV, ObjSize, B, DL, TLI);
// If the function was an __stpcpy_chk, and we were able to fold it into
// a __memcpy_chk, we still need to return the correct end pointer.
if (Ret && Func == LibFunc::stpcpy_chk)
return B.CreateGEP(B.getInt8Ty(), Dst, ConstantInt::get(SizeTTy, Len - 1));
return Ret;
}
Value *FortifiedLibCallSimplifier::optimizeStrpNCpyChk(CallInst *CI,