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1022431
2012 Aug 19
2
[LLVMdev] isSafeToSpeculativelyExecute() for CallInst
Hello,
Currently, llvm::isSafeToSpeculativelyExecute() always returns false for Call instructions.
This has actual performance implications, because loop-invariant code motion makes this check, and will never hoist instructions that are not safe to speculatively execute.
Unfortunately, there is currently no way to signal to LICM that a function is safe to speculatively execute. The