Add warning to back end and add test. Patch is attached.
If the patch is acceptable, I would appreciate if someone could commit
it for me as I do not have write access.
2017-05-XX Jozef Lawrynowicz <joze...@somniumtech.com>
gcc/
PR target/78818
* config/msp430/msp430.c (msp430_unique_section): Warn if .persistent
attribute is used on an automatic variable.
gcc/testsuite
PR target/78818
* gcc.target/msp430/pr78818/pr78818-auto-warn.c: New test.
0002-MSP430-Emit-warning-when-persistent-attribute-is-use.patch
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