lib/CodeGen/IntrinsicLowering.cpp

65 static CallInst *ReplaceCallWith(const char *NewFn, CallInst *CI,
70   Module *M = CI->getParent()->getParent()->getParent();
78   IRBuilder<> Builder(CI->getParent(), CI);
81   NewCI->setName(CI->getName());
82   if (!CI->use_empty())
83     CI->replaceAllUsesWith(NewCI);
317 static void ReplaceFPIntrinsicWithCall(CallInst *CI, const char *Fname,
320   CallSite CS(CI);
321   switch (CI->getArgOperand(0)->getType()->getTypeID()) {
324     ReplaceCallWith(Fname, CI, CS.arg_begin(), CS.arg_end(),
325                   Type::getFloatTy(CI->getContext()));
328     ReplaceCallWith(Dname, CI, CS.arg_begin(), CS.arg_end(),
329                   Type::getDoubleTy(CI->getContext()));
334     ReplaceCallWith(LDname, CI, CS.arg_begin(), CS.arg_end(),
335                   CI->getArgOperand(0)->getType());
340 void IntrinsicLowering::LowerIntrinsicCall(CallInst *CI) {
341   IRBuilder<> Builder(CI->getParent(), CI);
342   LLVMContext &Context = CI->getContext();
344   const Function *Callee = CI->getCalledFunction();
347   CallSite CS(CI);
358     Value *V = CI->getArgOperand(0);
359     CI->replaceAllUsesWith(V);
368     Value *V = ReplaceCallWith("setjmp", CI, CS.arg_begin(), CS.arg_end(),
370     if (!CI->getType()->isVoidTy())
371       CI->replaceAllUsesWith(V);
375      if (!CI->getType()->isVoidTy())
376        CI->replaceAllUsesWith(Constant::getNullValue(CI->getType()));
380     ReplaceCallWith("longjmp", CI, CS.arg_begin(), CS.arg_end(),
387     ReplaceCallWith("abort", CI, CS.arg_end(), CS.arg_end(),
392     CI->replaceAllUsesWith(LowerCTPOP(Context, CI->getArgOperand(0), CI));
396     CI->replaceAllUsesWith(LowerBSWAP(Context, CI->getArgOperand(0), CI));
400     CI->replaceAllUsesWith(LowerCTLZ(Context, CI->getArgOperand(0), CI));
405     Value *Src = CI->getArgOperand(0);
410     Src = LowerCTPOP(Context, Builder.CreateAnd(NotSrc, SrcM1), CI);
411     CI->replaceAllUsesWith(Src);
423       CI->replaceAllUsesWith(Constant::getNullValue(CI->getType()));
432     CI->replaceAllUsesWith(ConstantPointerNull::get(
433                                             cast<PointerType>(CI->getType())));
444     CI->replaceAllUsesWith(ConstantInt::get(Type::getInt64Ty(Context), 0));
453     CI->replaceAllUsesWith(ConstantInt::get(CI->getType(), 1));
459     CI->replaceAllUsesWith(CI->getOperand(0));
467     Value *Size = Builder.CreateIntCast(CI->getArgOperand(2), IntPtr,
470     Ops[0] = CI->getArgOperand(0);
471     Ops[1] = CI->getArgOperand(1);
473     ReplaceCallWith("memcpy", CI, Ops, Ops+3, CI->getArgOperand(0)->getType());
478     Value *Size = Builder.CreateIntCast(CI->getArgOperand(2), IntPtr,
481     Ops[0] = CI->getArgOperand(0);
482     Ops[1] = CI->getArgOperand(1);
484     ReplaceCallWith("memmove", CI, Ops, Ops+3, CI->getArgOperand(0)->getType());
488     Value *Op0 = CI->getArgOperand(0);
490     Value *Size = Builder.CreateIntCast(CI->getArgOperand(2), IntPtr,
495     Ops[1] = Builder.CreateIntCast(CI->getArgOperand(1),
499     ReplaceCallWith("memset", CI, Ops, Ops+3, CI->getArgOperand(0)->getType());
503     ReplaceFPIntrinsicWithCall(CI, "sqrtf", "sqrt", "sqrtl");
507     ReplaceFPIntrinsicWithCall(CI, "logf", "log", "logl");
511     ReplaceFPIntrinsicWithCall(CI, "log2f", "log2", "log2l");
515     ReplaceFPIntrinsicWithCall(CI, "log10f", "log10", "log10l");
519     ReplaceFPIntrinsicWithCall(CI, "expf", "exp", "expl");
523     ReplaceFPIntrinsicWithCall(CI, "exp2f", "exp2", "exp2l");
527     ReplaceFPIntrinsicWithCall(CI, "powf", "pow", "powl");
532      if (!CI->getType()->isVoidTy())
533        CI->replaceAllUsesWith(ConstantInt::get(CI->getType(), 1));
538     CI->replaceAllUsesWith(UndefValue::get(CI->getType()));
546   assert(CI->use_empty() &&
548   CI->eraseFromParent();
551 bool IntrinsicLowering::LowerToByteSwap(CallInst *CI) {
553   if (CI->getNumArgOperands() != 1 ||
554       CI->getType() != CI->getArgOperand(0)->getType() ||
555       !CI->getType()->isIntegerTy())
558   IntegerType *Ty = dyn_cast<IntegerType>(CI->getType());
563   Module *M = CI->getParent()->getParent()->getParent();
566   Value *Op = CI->getArgOperand(0);
567   Op = CallInst::Create(Int, Op, CI->getName(), CI);
569   CI->replaceAllUsesWith(Op);
570   CI->eraseFromParent();