Description of Problem: gcc -O generates bad code for switch statement


Version-Release number of selected component (if applicable):
gcc-3.1-0.10

How Reproducible: 'gcc -O -c z9.i' with attached z9.i - the switch
statement in pdump_get_indirect_count is miscompiled with -O, generating an
undefined reference to a label in a branch table.


Steps to Reproduce:
1. unzip z9.i.gz
2. gcc -v -c z9.i  and then 'nm z9.o | grep L'  - none found.
3. gcc -V -O3 -c z9.i  and 'mn z9.o | grep L'

Actual Results: -O, -O1, -O2, and -O3 all miscompile the switch statement,
leaving a dangling '.long .L<n>' for varying values of <N> depending on the
-O level.  This results in an undefined symbol when you try to link the
program.


Expected Results: Correct code generated.


Additional Information:
I have attached a 'z9.i.gz' file - unzip and compile as above.