Re: [PATCH 3/3] powerpc: use __builtin_trap() in BUG/WARN macros.
From: Segher Boessenkool
Date: Mon Aug 19 2019 - 09:23:50 EST
On Mon, Aug 19, 2019 at 01:06:31PM +0000, Christophe Leroy wrote:
> Note that we keep using an assembly text using "twi 31, 0, 0" for
> inconditional traps because GCC drops all code after
> __builtin_trap() when the condition is always true at build time.
As I said, it can also do this for conditional traps, if it can prove
the condition is always true.
Can you put the bug table asm *before* the __builtin_trap maybe? That
should make it all work fine... If you somehow can tell what machine
instruction is that trap, anyway.
Segher