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Implement the llvm.memcpy intrinsic

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llvm-svn: 11349
This commit is contained in:
Chris Lattner 2004-02-12 17:01:09 +00:00
parent ef375052c6
commit 0d988a0d14
3 changed files with 20 additions and 1 deletions
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3
lib/VMCore/Function.cpp
View File

@ -217,6 +217,9 @@ unsigned Function::getIntrinsicID() const {
case 'l':
if (getName() == "llvm.longjmp") return Intrinsic::longjmp;
break;
case 'm':
if (getName() == "llvm.memcpy") return Intrinsic::memcpy;
break;
case 's':
if (getName() == "llvm.setjmp") return Intrinsic::setjmp;
if (getName() == "llvm.sigsetjmp") return Intrinsic::sigsetjmp;

16
lib/VMCore/IntrinsicLowering.cpp
View File

@ -13,8 +13,8 @@
#include "llvm/IntrinsicLowering.h"
#include "llvm/Constant.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Module.h"
#include "llvm/Type.h"
#include "llvm/iOther.h"
using namespace llvm;
@ -57,6 +57,20 @@ void DefaultIntrinsicLowering::LowerIntrinsicCall(CallInst *CI) {
if (CI->getType() != Type::VoidTy)
CI->replaceAllUsesWith(Constant::getNullValue(CI->getType()));
break; // Simply strip out debugging intrinsics
case Intrinsic::memcpy: {
// The memcpy 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 *MemCpy = M->getOrInsertFunction("memcpy", FT);
new CallInst(MemCpy, std::vector<Value*>(CI->op_begin()+1, CI->op_end()-1),
CI->getName(), CI);
break;
}
}
assert(CI->use_empty() &&

2
lib/VMCore/Verifier.cpp
View File

@ -561,6 +561,8 @@ void Verifier::visitIntrinsicFunctionCall(Intrinsic::ID ID, CallInst &CI) {
case Intrinsic::dbg_region_end: NumArgs = 1; break;
case Intrinsic::dbg_func_start: NumArgs = 1; break;
case Intrinsic::dbg_declare: NumArgs = 1; break;
case Intrinsic::memcpy: NumArgs = 4; break;
case Intrinsic::alpha_ctlz: NumArgs = 1; break;
case Intrinsic::alpha_cttz: NumArgs = 1; break;