Tablegen dumps core if you try to use the "include" statement to include
a file that doesn't exist. For example:

185 zion> echo 'include "../crzjgrdwldiwdc.td"' > whoops.td
186 zion> tblgen whoops.td
Parsing whoops.td:1: Could not find include file '/../crzjgrdwldiwdc.td'!
Abort (core dumped)

Also note the error message has the wrong filename.

Tablegen's entire error recovery strategy is built around the idea that calling
'abort' is a solution.

This certainly should be fixed, but it's not a high priority.  :)

-Chris

I'm a fan of incremental improvement - as the *original* title of the bug
implied, I would be satisfied 
with something that just called exit(1) instead of dumping core. :-)

Oh, and this patch:
http://mail.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20040209/011581.html

Fixes the 'wrong filename' problem:

$ echo 'include "../crzjgrdwldiwdc.td"' | tblgen 
Parsing <stdin>:1: Could not find include file '../crzjgrdwldiwdc.td'!
Abort

-Chris

I would support exit(1).  :)

-Chris

Fine, have it your way.  :)  I thought tablegen abort'ing for the fun of it was
kinda cute myself.  Especially the plethora of core files that you get to
accumulate.  No fun for tablegen I guess.

Patch:
http://mail.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20040209/011582.html

-Chris

Thanks!