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...ackend utilize the legalize stage that can break it into instructions with smaller integer types if the target machine does not support that large integer type. There seems no way to prevent clang generate i64 instruction. Are you developing a new backend? 2015-01-28 17:55 GMT+08:00 Alon Shaltiel (ashaltie) <ashaltie at cisco.com<mailto:ashaltie at cisco.com>>: Hello, Is there a way to make clang create an IR file that doesn’t use 64 bit integers? My C code doesn’t use any 64bit types but still “clang –c –emit-llvm …” emits code that contains i64’s. Thanks, Alon __________________...

...zation on IR code, you can check PNaCl project. https://chromium.googlesource.com/native_client/pnacl-llvm/ The pass is located at: lib/Transforms/NaCl/ExpandLargeIntegers.cpp You need make some change, as the pass split large integer into 64bit integers. 2015-01-29 16:06 GMT+08:00 Alon Shaltiel (ashaltie) <ashaltie at cisco.com>: > Is it just an optimization pass? Maybe I can cancel it somehow with a > flag or by doing some code editing? Can you point me to which passes may do > that? > > I'm working on editing a backend that can't work with anything larger than >...

Hello, I'm trying to extract the value out of my MDNode, but for some reason I can't. For example, if one part of the code gets an MDNode that was created as follows: Metadata* vals[2] = { ValueAsMetadata::get(&F), ValueAsMetadata::get(ConstantInt::get(context, 135)) }; MDNode* mdnode = MDNode::get(context, vals); Is it possible to extract the value of the constant int

Hi all, I'm looking for a way to insert metadata into an instruction/function/basic-block in the IR level, and afterwards reading it in the backend (ARM to be exact). So my questions are: 1. Does/can the metadata in the IR survive the code-generator in some way? 2. Is there a general of 'communication' between the optimizer and the backend? Thanks! Alon