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-fstrict-aliasing, -fno-strict-aliasing
Instructs the compiler to apply the strictest aliasing rules available.
Usage
-fstrict-aliasing is implicitly
enabled at -O1 or higher. It is disabled at -O0, or when no optimization level is specified.
When optimizing at -O1 or higher,
this option can be disabled with -fno-strict-aliasing.
Note
Specifying-fstrict-aliasing on
the command-line has no effect, since it is either implicitly enabled, or
automatically disabled, depending on the optimization level that is used.Examples
In the following example, -fstrict-aliasing is enabled:
armclang --target=aarch64-arm-none-eabi -O2 -c hello.c
In the following example, -fstrict-aliasing is disabled:
armclang --target=aarch64-arm-none-eabi -O2 -fno-strict-aliasing -c hello.c
In the following example, -fstrict-aliasing is disabled:
armclang --target=aarch64-arm-none-eabi -c hello.c