//===----------------------------------------------------------------------===//
namespace {
-//===---------------------------------------===//
-// 'memset' Optimizations
-
-struct MemSetOpt : public LibCallOptimization {
- virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
- // These optimizations require DataLayout.
- if (!TD) return 0;
-
- FunctionType *FT = Callee->getFunctionType();
- if (FT->getNumParams() != 3 || FT->getReturnType() != FT->getParamType(0) ||
- !FT->getParamType(0)->isPointerTy() ||
- !FT->getParamType(1)->isIntegerTy() ||
- FT->getParamType(2) != TD->getIntPtrType(*Context))
- return 0;
-
- // memset(p, v, n) -> llvm.memset(p, v, n, 1)
- Value *Val = B.CreateIntCast(CI->getArgOperand(1), B.getInt8Ty(), false);
- B.CreateMemSet(CI->getArgOperand(0), Val, CI->getArgOperand(2), 1);
- return CI->getArgOperand(0);
- }
-};
-
//===----------------------------------------------------------------------===//
// Math Library Optimizations
//===----------------------------------------------------------------------===//
TargetLibraryInfo *TLI;
StringMap<LibCallOptimization*> Optimizations;
- // Memory LibCall Optimizations
- MemSetOpt MemSet;
// Math Library Optimizations
CosOpt Cos; PowOpt Pow; Exp2Opt Exp2;
UnaryDoubleFPOpt UnaryDoubleFP, UnsafeUnaryDoubleFP;
/// Optimizations - Populate the Optimizations map with all the optimizations
/// we know.
void SimplifyLibCalls::InitOptimizations() {
- // Memory LibCall Optimizations
- AddOpt(LibFunc::memset, &MemSet);
-
// Math Library Optimizations
Optimizations["cosf"] = &Cos;
Optimizations["cos"] = &Cos;