search for: earlyifconversion

...ons like thumb2, but can specify which condition code register they refer to. Now also assume that these predicate instructions themselves are predicatible, if executed they change the current predication state. Can LLVM handle multiple levels of predication? When is IfConversion used and when is EarlyIfConversion used? Is there any documentation on this? thanks, brian

...ter live across the other branch. If, alternatively, IfConversion ran before register allocation, the LI instructions could run speculatively. The register allocator would prevent clobbering, and the predication transformation would succeed even for non-16-bit immediates. I also see there is an EarlyIfConversion pass which is intended to run before register allocation. However this pass seems significantly weaker than IfConversion as it doesn't allow the target to predicate arbitrary instructions. Please correct my if I'm wrong about EarlyIfConversion. (2) IfConversion assumes that predicable...

Hi all, I am using llvm backend to generate binary for a specific accelerator. I would like to convert instructions into predicated form when instructions are still in SSA form. It looks like that ifconversion execution flow is different when instructions are in SSA form. However, I am encountering many problems (specially with registers) when I use it before register allocation. I was wondering

...serts build llvm[2]: Compiling DwarfEHPrepare.cpp for Release+Asserts build llvm[3]: Compiling RuntimeDyldMachO.cpp for Release+Asserts build llvm[3]: Compiling TailRecursionElimination.cpp for Release+Asserts build llvm[3]: Compiling ElimAvailExtern.cpp for Release+Asserts build llvm[2]: Compiling EarlyIfConversion.cpp for Release+Asserts build llvm[3]: Compiling ExtractGV.cpp for Release+Asserts build llvm[3]: Building Release+Asserts Archive Library libLLVMRuntimeDyld.a make[3]: Leaving directory '/home/NIKHILREDDY/WORK/LLVM_OBJ/lib/ExecutionEngine/RuntimeDyld' llvm[2]: Compiling ExecutionEngine.cpp...