FastR: Inlining failing

[Juan Fumero]

Hi all, 
  
 Within FastR,  I am working now Tuples (RList with fixed types) in R
for the GPU. I get a runtime error when I am trying to compile the
function through the Partial Evaluator. 

<code>
# Simple test case
Tuple2 <- function(x, y) {
    t <- list(name="tuple2", a=x, b=y)  
    attr(t, "class") <- "tuple2"
    return(t)
}

gpuFunction <- function(x) {
     return(Tuple2(x, x))
}

# R sapply for GPUs
result <- marawacc.sapply(1:1000, gpuFunction)   

</code>

When Graal tries to compile the gpuFunction through the
OptimzedCallTarget, I get the following error in FastR. Any idea? I do
not get why this is a recursive inlining, 

[truffle] opt
fail         gpuFunction                                               
  |Reason jdk.vm.ci.code.BailoutException: Too deep inlining, probably
caused by recursive inlining. Inlined methods ordered by inlining
frequency:
java.util.ResourceBundle.getObject(String) [488]
java.text.DecimalFormatSymbols.getInstance(Locale) [1]
java.util.Formatter.<init>(Locale, Appendable) [1]
com.oracle.graal.truffle.OptimizedCallTarget.callRoot(Object[]) [1]
java.lang.String.format(String, Object[]) [1]
com.oracle.graal.truffle.OptimizedCallTarget.callProxy(VirtualFrame)
[1]
java.text.DecimalFormatSymbols.<init>(Locale) [1]
java.util.Formatter.getZero(Locale) [1]
com.oracle.truffle.r.nodes.function.FunctionDefinitionNode.gpuExecution
(VirtualFrame) [1]
java.text.DecimalFormatSymbols.initialize(Locale) [1]
com.oracle.truffle.r.runtime.RInternalError.<init>(Throwable, String,
Object[]) [1]
java.util.Formatter.<init>() [1]
com.oracle.truffle.r.nodes.function.FunctionDefinitionNode.execute(Virt
ualFrame) [1]
sun.util.locale.provider.LocaleResources.getDecimalFormatSymbolsData()
[1]
sun.util.locale.provider.DecimalFormatSymbolsProviderImpl.getInstance(L
ocale) [1] 


It does work if, instead of returning as S3 object, I return an RList. 

<code>
gpuFunction <- function(x) {
     list(name="tuple2",x,x) 
}
</code>

As a work around I am working with RList directly, but I would like to return an S3 object. Any idea is welcome.

Cheers
Juan


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