func (c *compiler) defineFreeFunction(fn llvm.Value) {
entry := llvm.AddBasicBlock(fn, "entry")
c.builder.SetInsertPointAtEnd(entry)
ptr := fn.FirstParam()
ptrtyp := llvm.PointerType(llvm.Int8Type(), 0)
c.builder.CreateFree(c.builder.CreateIntToPtr(ptr, ptrtyp, ""))
c.builder.CreateRetVoid()
}
func (c *compiler) defineMallocFunction(fn llvm.Value) {
entry := llvm.AddBasicBlock(fn, "entry")
c.builder.SetInsertPointAtEnd(entry)
size := fn.FirstParam()
ptr := c.builder.CreateArrayMalloc(llvm.Int8Type(), size, "")
// XXX memset to zero, or leave that to Go runtime code?
fn_type := fn.Type().ElementType()
result := c.builder.CreatePtrToInt(ptr, fn_type.ReturnType(), "")
c.builder.CreateRet(result)
}