[Bug c/52283] "error: case label does not reduce to an integer constant" for constant folded cast expr

[chrbr at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52283

--- Comment #12 from chrbr at gcc dot gnu.org 2012-02-20 15:27:38 UTC ---
Created attachment 26705
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26705
Tentative fix.

Testing this patch. Avoids setting TREE_NO_WARNING if not necessary, and strip
nops to check for unused values, for PR 26632.