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Fix mismatched type problem that crashed on cases like this:

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sprintf(P, "%s", X);

Where X is not an sbyte*.  This fixes the bug JohnMC reported on llvm-bugs.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22159 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-05-20 22:22:25 +00:00
parent 42eb7524ef
commit 9375135999
1 changed files with 17 additions and 8 deletions
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25
lib/Transforms/IPO/SimplifyLibCalls.cpp
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@ -542,7 +542,7 @@ public:
return false;
}
/// @brief Perform the strcpy optimization
/// @brief Perform the strchr optimizations
virtual bool OptimizeCall(CallInst* ci, SimplifyLibCalls& SLC)
{
// If there aren't three operands, bail
@ -625,7 +625,7 @@ public:
"Number of 'strcmp' calls simplified") {}
virtual ~StrCmpOptimization() {}
/// @brief Make sure that the "strcpy" function has the right prototype
/// @brief Make sure that the "strcmp" function has the right prototype
virtual bool ValidateCalledFunction(const Function* f, SimplifyLibCalls& SLC)
{
if (f->getReturnType() == Type::IntTy && f->arg_size() == 2)
@ -633,7 +633,7 @@ public:
return false;
}
/// @brief Perform the strcpy optimization
/// @brief Perform the strcmp optimization
virtual bool OptimizeCall(CallInst* ci, SimplifyLibCalls& SLC)
{
// First, check to see if src and destination are the same. If they are,
@ -710,7 +710,7 @@ public:
"Number of 'strncmp' calls simplified") {}
virtual ~StrNCmpOptimization() {}
/// @brief Make sure that the "strcpy" function has the right prototype
/// @brief Make sure that the "strncmp" function has the right prototype
virtual bool ValidateCalledFunction(const Function* f, SimplifyLibCalls& SLC)
{
if (f->getReturnType() == Type::IntTy && f->arg_size() == 3)
@ -1366,6 +1366,15 @@ public:
}
} FPrintFOptimizer;
/// CastToCStr - Return V if it is an sbyte*, otherwise cast it to sbyte*,
/// inserting the cast before IP, and return the cast.
static Value *CastToCStr(Value *V, Instruction &IP) {
const Type *SBPTy = PointerType::get(Type::SByteTy);
if (V->getType() != SBPTy)
return new CastInst(V, SBPTy, V->getName(), &IP);
return V;
}
/// This LibCallOptimization will simplify calls to the "sprintf" library
/// function. It looks for cases where the result of sprintf is not used and the
@ -1468,8 +1477,8 @@ public:
if (!strcpy_func)
return false;
std::vector<Value*> args;
args.push_back(ci->getOperand(1));
args.push_back(ci->getOperand(3));
args.push_back(CastToCStr(ci->getOperand(1), *ci));
args.push_back(CastToCStr(ci->getOperand(3), *ci));
new CallInst(strcpy_func,args,"",ci);
}
else if (getConstantStringLength(ci->getOperand(3),len))
@ -1480,8 +1489,8 @@ public:
if (!memcpy_func)
return false;
std::vector<Value*> args;
args.push_back(ci->getOperand(1));
args.push_back(ci->getOperand(3));
args.push_back(CastToCStr(ci->getOperand(1), *ci));
args.push_back(CastToCStr(ci->getOperand(3), *ci));
args.push_back(ConstantUInt::get(Type::UIntTy,len));
args.push_back(ConstantUInt::get(Type::UIntTy,1));
new CallInst(memcpy_func,args,"",ci);