Is it easy to achieve an O3 optimization level using LLVM directly?

Question

Is it easy to achieve a high level of optimization with LLVM?

To give a concrete example, suppose I have a simple lanuage that I want to write to the compiler.

• simple functions
• simple structures
• tables
• pointers (with arithmetic)
• management structures
• and etc.

I can easily compile for compilation and use clang -O3. Is the LLVM API easy to use for this purpose?

Answer 1

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• LLVM IR , C, API . C, , AST C . , .
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• , , (.. #define s, , ), . , (, , , C - AFAIK, ) , pure/readonly, (, ). , .

Answer 2

LLVM , O3- API.