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g - ARM Compiler toolchain Compiler Reference
Compiler Command-line Options
ARM Compiler toolchain Compiler Reference Version 5.01
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This option sets high-level optimization diagnostic messages
to have Warning severity.
By default, optimization messages have Remark severity.
The compiler performs certain high-level vector and scalar
optimizations when compiling at the optimization level -O3-Otime,
for example, loop unrolling. Use this option to display diagnostic messages
relating to these high-level optimizations.
int factorial(int n)
while (n > 0)
result *= n--;
Compiling this code with the options --vectorize --cpu=Cortex-A8
optimization warning messages.