[LLVMdev] Marking machineinstructions that are spills generated by register allocation

Jakob Stoklund Olesen stoklund at 2pi.dk
Thu Sep 29 07:39:36 PDT 2011

On Sep 29, 2011, at 2:19 AM, Heikki Kultala wrote:

> Our TCE backend (which is not in the official llvm repo) benefits 
> greatly from information that which memory load/store is a spill 
> generated by register allocation.
> These spill memory operation can never alias with other memory 
> operations, and our own instruction scheduler can optimize much better 
> with better alias information.

This information is available from the instruction's memory operands.

See EmitComments() in lib/CodeGen/AsmPrinter/AsmPrinter.cpp.


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