[PATCH][MSP430] Add options to toggle NOP warnings for possible interrupt state changes

[Jozef Lawrynowicz]

MSP430 requires NOP instructions to be inserted before some instructions which
enable or disable interrupts.

Currently, the assembler will always act when NOPs are missing around an
instruction which *may* change interrupt state. These are instructions that
modify the status register in a way that is unknown at assembly time e.g.
because the value being written to the status register is in a register.

The attached patch adds options so this behaviour to act on instructions which
*may* enable or disable interrupts can be toggled on/off. The constraints for
when to warn about the "unknown" interrupt state changes have also been
tightened, to prevent extraneous warnings.

If the patch is acceptable, I would appreciate if someone would commit it for
me as I do not have write access.

Thanks,
Jozef
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 0001-MSP430-Add-m-u-U-options-to-enable-disable-NOP-warni.patch
Type: text/x-patch
Size: 10115 bytes
Desc: not available
URL: <https://sourceware.org/pipermail/binutils/attachments/20190415/23735d92/attachment.bin>