llvm dev - Dec 2002 - [LLVMdev] Re: llvm-gcc goes 10 rounds against the GNU mascot and loses, film at 11

Brian was kind enough to test llvmgcc against a bunch of GNU code.  This
exposed all kinds of bugs, fixes below.
> recode   -- fails (bad headers, many ICEs)
Can you give me a list of headers it wants?  It's usally pretty easy to
add them if I know what it needs...
> cpio     -- fails (dstring.c -- weird ssa bug)
Fixed.  This was a C frontend bug (problem assigning temporary reg nums).
> diffutils-- fails (analyze.c, diff.c and others)
The analyze.c bug is tested here:
http://mail.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20021209/001957.html

and fixed here:
http://mail.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20021209/001958.html

diff.c doesn't compile with the platform CC.
> gnuchess -- fails (eval.c, main.c and others)
eval.c works now, perhaps because of other fixes.

main.c is tested here:
http://mail.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20021209/001959.html

This was a bug in the C frontend treating 'char foo[] =
"abcd";' as a
constant because the initializer was a const, even though the variable
itself wasn't const.  Whoops.  :)

Another interesting part of my fix was that I discovered I wasn't marking
nearly as many globals as constant as I should (for example 'const int X
7').  This is also fixed, tested here:
http://mail.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20021209/001960.html
> a2ps     -- fails (fonts.c at -O2, and several others)
This works now, presumably because of other fixes
> grep     -- fails (regex.c)
> rx       -- fails (rxgnucomp.c)
These is because of a known problem passing structures by value.  I added
a new testcase distilled from it, which is somewhat simpler than the
previously existing one:

New:
http://mail.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20021209/001961.html
Old: test/Regression/CFrontend/2002-04-10-StructParameters.c

I will fix this eventually.  :)
> enscript -- fails (afm.c)
This calls setjmp, which isn't supported yet.

Thanks for all of the reports!!

-Chris

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