[Mesa-dev] [Bug 29404] "Cannot yet select" LLVM error with r300g, softpipe and llvmpipe

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Thu Aug 5 10:05:47 PDT 2010


--- Comment #2 from steckdenis at yahoo.fr 2010-08-05 10:05:47 PDT ---
Created an attachment (id=37592)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=37592)
Output from LLVM when trying to run Neverball


I attach to this bug the output of Gallium and LLVM when trying to run
neverball. I also saw the bug #29407 (and commented it). It's possible that
that bug has something to do with this one. Gallium seems to wrongly manage the
type of the instructions it uses.

I also tried the patch found in the third comment of #29407. Unfortunately, I
could not test with r300g because recent changes in Mesa (the changes of today
I think) broke the memory allocator
("util/u_mempool.c:89:util_mempool_malloc_st: Assertion `block->magic ==
0xcafe4321' failed."). I tried with llvmpipe, and I didn't encountered this

Instead, the assert here is raised

#ifdef DEBUG
   if(LLVMVerifyFunction(function, LLVMPrintMessageAction)) {
      if (1)

The stack trace given by GDB is :

#0  0x00007ffff727d565 in raise () from /lib/libc.so.6
#1  0x00007ffff727e9e6 in abort () from /lib/libc.so.6
#2  0x00007ffff49dac57 in generate_fragment (lp=<value optimized out>,
shader=0x400088, variant=0x1fdde20, partial_mask=0)
    at lp_state_fs.c:695
#3  0x00007ffff49db496 in generate_variant (lp=0x61d2a0) at lp_state_fs.c:820
#4  llvmpipe_update_fs (lp=0x61d2a0) at lp_state_fs.c:1157
#5  0x00007ffff49d8488 in llvmpipe_update_derived (llvmpipe=0x61d2a0) at
#6  0x00007ffff49cd34a in llvmpipe_draw_vbo (pipe=0x61d2a0,
info=0x7fffffffdbc0) at lp_draw_arrays.c:60
#7  0x00007ffff4abd0f8 in st_draw_vbo (ctx=0x1f2feb0, arrays=<value optimized
out>, prims=0x1fbda90, nr_prims=2, ib=0x0, 
    index_bounds_valid=<value optimized out>, min_index=0, max_index=161) at
#8  0x00007ffff4ae9419 in vbo_save_playback_vertex_list (ctx=0x1f2feb0,
data=0x1fbd2f8) at vbo/vbo_save_draw.c:287
#9  0x00007ffff4a0a8da in ext_opcode_execute (ctx=0x1f2feb0, list=<value
optimized out>) at main/dlist.c:533
#10 execute_list (ctx=0x1f2feb0, list=<value optimized out>) at
#11 0x00007ffff4a0d352 in _mesa_CallList (list=1) at main/dlist.c:8133

The program produces output. I will attach it after sending this comment.

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