Whoops... I hit enter at the "enter bug" screen instead of tab, thus making my
bug's description empty. Sigh.

I am going to attach the part of bison that seems to be getting miscompiled.
You get two different crashes depending on whether you use -Wa,-disable-opt
-Wl,-disable-opt or not, but that doesn't surprise me much if the input code is
itself broken. 

Created an attachment (id=72) [details]
Apparently miscompiled portion of bison's parse-gram.c

Preprocessed source.

Cool, I'm looking into it, though I may not get to it until tommorow.

Thanks Brian!

-Chris

Here's a reduced testcase for the miscompilation:

typedef struct {
    int A;
} boundary;

boundary X, Y;

void func(boundary FOO) {
  X = Y = FOO;
}

-Chris

Fixed.  Testcase here: (SingleSource/Regression/C/2004-02-03-AggregateCopy.c)
http://mail.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20040202/011095.html

Patch here: 
http://mail.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20040202/011096.html

Thanks for tracking this down Brian!

-Chris

*** Bug 163 has been marked as a duplicate of this bug. ***