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Hi Tim, Thanks for your reply. I know O4 is same as O3 now. I am wondering the bitcodes generated by llvm-gcc and clang are same, or almost same, I mean they are almost same, but maybe some newly-created optimization would exert impact. Best, Yuxi ________________________________________ From: Tim Northover [t.p.northover at gmail.com] Sent: Thursday, July 21, 2016 4:11 PM To: Yuxi Chen Cc:

Hi, I want to copy some dependent statements, like a = b, b = c, from one basicblock to another basicblocks. Because of SSA, a = b, will be like %1 = load %b, store %1, %a. If I just use clone() method in Instruction class, it will be like <badref> = load %b, store <badref>, %a. If I need remap the virtual registers, this map just will affect the whole module? And how to use it? I am

Hi all, I am newbie for llvm. I just create a global variable, there are some statements in my pass like: LoadInst* int64_64 = new LoadInst(pthreadPID, "", false, OptAplusOne); int64_64->setAlignment(8); int64_64->dump(); LoadInst* int32_65 = new LoadInst(gvar_int32_myFlag, "", false, OptAplusOne); int32_65->setAlignment(4);