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Add support for the llvm.memmove intrinsic

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Patch graciously contributed by Reid Spencer!

llvm-svn: 11355
This commit is contained in:
Chris Lattner 2004-02-12 18:11:20 +00:00
parent 7c8aebbdbc
commit c908f6b738
3 changed files with 15 additions and 0 deletions
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1
lib/VMCore/Function.cpp
View File

@ -219,6 +219,7 @@ unsigned Function::getIntrinsicID() const {
break;
case 'm':
if (getName() == "llvm.memcpy") return Intrinsic::memcpy;
if (getName() == "llvm.memmove") return Intrinsic::memmove;
break;
case 's':
if (getName() == "llvm.setjmp") return Intrinsic::setjmp;

13
lib/VMCore/IntrinsicLowering.cpp
View File

@ -71,6 +71,19 @@ void DefaultIntrinsicLowering::LowerIntrinsicCall(CallInst *CI) {
CI->getName(), CI);
break;
}
case Intrinsic::memmove: {
// The memmove intrinsic take an extra alignment argument that the memcpy
// libc function does not.
const FunctionType *CFT = Callee->getFunctionType();
FunctionType *FT =
FunctionType::get(*CFT->param_begin(),
std::vector<const Type*>(CFT->param_begin(), CFT->param_end()-1),
false);
Function *MemMove = M->getOrInsertFunction("memmove", FT);
new CallInst(MemMove, std::vector<Value*>(CI->op_begin()+1, CI->op_end()-1),
CI->getName(), CI);
break;
}
}
assert(CI->use_empty() &&

1
lib/VMCore/Verifier.cpp
View File

@ -563,6 +563,7 @@ void Verifier::visitIntrinsicFunctionCall(Intrinsic::ID ID, CallInst &CI) {
case Intrinsic::dbg_declare: NumArgs = 1; break;
case Intrinsic::memcpy: NumArgs = 4; break;
case Intrinsic::memmove: NumArgs = 4; break;
case Intrinsic::alpha_ctlz: NumArgs = 1; break;
case Intrinsic::alpha_cttz: NumArgs = 1; break;