[LLVMdev] how the fptrunc ... to .... is supported

[Zhang, Kewu]

Dear experts.

I am curious how the "<targettype> = fptrunc <sourcetype> <value> to <targettype>" is supported by the backends?  I searched all llvm directory with "fptrunc" key words, no lucky.

Is it supported by the front end itself?

if I have to support/overide it, which ISD node I should map to?
why there is no such a node like "fptrunc" is defined  so I can write patterns for it?

best
kevin

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