LTO abbreviates Link-Time Optimization. LTO is a phase of optimization applied to a compiled program at the linkage step, with the advantage that all of the compiled object files comprising the program can then be analysed together. Conventional optimization is performed by the compiler alone, which can generate and optimize only one object file at a time.
Questions tagged [lto]
156 questions
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Can all compile-time optimizations be done with link-time optimization?
Or are there some optimizations that can only be done at compile time (and therefore only work within compilation units)? I ask because in C, the compilation unit is a source file, and I'm trying to understand if there is any reason not to split…
awelkie
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C++ program compiled with FlasCC with -O4 (LTO) hangs on virtual call
I have a problem with LTO optimization in FlasCC.
When compiled with -O1 resulting swf runs just fine.
But with -O4 it first runs OK, but then suddenly hangs on specific virtual function call for time over than 15 seconds and then Flash stops…
EyeGem
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What kind of program can benefit much from LTO?
When using dhrystone to get DMIPS, I found that LTO greatly impacted the results. LTO-dhrystone is nearly 4x LTO-less-dhrystone:
$ wget http://www.xanthos.se/~joachim/dhrystone-src.tar.gz
$ cd dhrystone-src
without LTO
$ aarch64-linux-gnu-gcc -O3…
Chen Li
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Map all returns of virtual functions to their corresponding return addresses
basically I want to do caller/callee mapping by adding runtime checks
which checks for the allowed ranges before each C/C++ return is
executed.
I have a forward mapping of all virtual object dispatches to the
allowed virtual table entries for a…
gBoy
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C: Compiling pre-compiled code as inline
For some rather complicated reason, I have a set of files which I would like to compile seperatly and then link, but so that the functions in one are placed inline in the second. This is because I would like them to be compiled with different flags…
superbriggs
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How do I enable LinkTimeOptimization with Clion?
I'd like to have my program link time optimized. Where do I have to enter it to enable it?
If it matters (I hope it doesn't): I'm using MinGW-w64 5.0 on Windows.
edit: I really don't see why it wouldn't matter that I'm using CLion. I'm aware that -…
Jack Sabbath
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