[Bug 79504] New: LLVM error on fragment shader

[Bug 79504] New: LLVM error on fragment shader

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=79504

          Priority: medium
            Bug ID: 79504
          Assignee: dri-devel@lists.freedesktop.org
           Summary: LLVM error on fragment shader
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: kyle@klkblake.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: git
         Component: Drivers/Gallium/radeonsi
           Product: Mesa

Created attachment 100230
  --> https://bugs.freedesktop.org/attachment.cgi?id=100230&action=edit
fragment shader

After compiling the attached shader and making it current, calling glClear()
causes the process to crash with this error:

    LLVM ERROR: Cannot select: 0x314a010: v16f32 = bitcast 0x3185250 [ORD=347]
[ID=224]
      0x3185250: v16i32 = BUILD_VECTOR 0x3153680, 0x3153780, 0x3153880,
0x3153980, 0x3187b70, 0x3187970, 0x3097a00, 0x3097800, 0x3097600, 0x3097400,
0x3097200, 0x3097000, 0x3096e00, 0x3096c00, 0x3185550, 0x314b520 [ORD=347]
[ID=222]
        ... <snip> ...

(full error attached)

I'm using the latest git version (3fc72f2ec601cb758d69cf2933dd6268d1a80c5b).

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[Bug 79504] LLVM error on fragment shader

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=79504

--- Comment #1 from Kyle Blake <kyle@klkblake.com> ---
Created attachment 100231
  --> https://bugs.freedesktop.org/attachment.cgi?id=100231&action=edit
simple vertex shader

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[Bug 79504] LLVM error on fragment shader

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=79504

--- Comment #2 from Kyle Blake <kyle@klkblake.com> ---
Created attachment 100232
  --> https://bugs.freedesktop.org/attachment.cgi?id=100232&action=edit
full error log

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[Bug 79504] LLVM error on fragment shader

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=79504

--- Comment #3 from Kyle Blake <kyle@klkblake.com> ---
Created attachment 100233
  --> https://bugs.freedesktop.org/attachment.cgi?id=100233&action=edit
output of glxinfo

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[Bug 79504] LLVM error on fragment shader

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=79504

--- Comment #4 from Michel Dänzer <michel@daenzer.net> ---
Can you also attach code or post instructions for reproducing the problem with
this fragment shader?

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[Bug 79504] LLVM error on fragment shader

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=79504

--- Comment #5 from Kyle Blake <kyle@klkblake.com> ---
Created attachment 100273
  --> https://bugs.freedesktop.org/attachment.cgi?id=100273&action=edit
testcase

Compile with gcc test.c -lGL -lglut. Depends on freeglut for context creation.
Requires raycast.vert and raycast.frag to be in the working directory.

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[Bug 79504] LLVM error on fragment shader

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=79504

--- Comment #6 from Michel Dänzer <michel@daenzer.net> ---
Thanks, but unfortunately, this results in an assertion failure during
glCompileShader() for me.

Can you attach the stderr output from running this on your end with
R600_DEBUG=ps?

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[Bug 79504] LLVM error on fragment shader

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=79504

--- Comment #7 from Kyle Blake <kyle@klkblake.com> ---
Created attachment 100277
  --> https://bugs.freedesktop.org/attachment.cgi?id=100277&action=edit
stderr output with R600_DEBUG=ps

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[Bug 79504] LLVM error on fragment shader

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https://bugs.freedesktop.org/show_bug.cgi?id=79504

--- Comment #8 from Michel Dänzer <michel@daenzer.net> ---
I can reproduce the shader compilation failure with LLVM 3.4, but it seems to
compile fine here with current LLVM Git/SVN.

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[Bug 79504] LLVM error on fragment shader

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=79504

--- Comment #9 from Kyle Blake <kyle@klkblake.com> ---
Yeah, it compiles with LLVM git here. However, when run, it locks up X for a
few seconds, displays some snow, and then locks up the kernel. I'm still
working on tracking down a minimal testcase for it, but at least replacing the
main while loop with this:

    child = texelFetch(octree, int(root)).x;

still allows the bug to manifest. Setting child to a constant value does not.
Setting the output of the entire shader to texelFetch(octree, int(root)).x at
the top and immediately returning displays the correct image, so the texture is
correct.

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[Bug 79504] LLVM error on fragment shader

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=79504

--- Comment #10 from Kyle Blake <kyle@klkblake.com> ---
Created attachment 100512
  --> https://bugs.freedesktop.org/attachment.cgi?id=100512&action=edit
full testcase

Sorry for the delay. Attached is a new test case that actually uses the
shaders. When it calls glDrawElements(), everything goes to hell, triggering
random segfault, graphics memory corruption, and kernel panics.

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[Bug 79504] LLVM error on fragment shader

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https://bugs.freedesktop.org/show_bug.cgi?id=79504

Michel Dänzer <michel@daenzer.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|dri-devel@lists.freedesktop |idr@freedesktop.org
                   |.org                        |
         QA Contact|                            |intel-3d-bugs@lists.freedes
                   |                            |ktop.org
          Component|Drivers/Gallium/radeonsi    |glsl-compiler

--- Comment #11 from Michel Dänzer <michel@daenzer.net> ---
I run into the assertion failure below in the GLSL compiler. That should be
addressed first.

test2: ../../../src/glsl/ir_validate.cpp:436: virtual ir_visitor_status
{anonymous}::ir_validate::visit_leave(ir_expression*): Assertion
`ir->operands[0]->type == ir->operands[1]->type' failed.

Program received signal SIGABRT, Aborted.
0x00007ffff75973a9 in __GI_raise (sig=sig@entry=6) at
../nptl/sysdeps/unix/sysv/linux/raise.c:56
56    ../nptl/sysdeps/unix/sysv/linux/raise.c: No such file or directory.
(gdb) bt
#0  0x00007ffff75973a9 in __GI_raise (sig=sig@entry=6) at
../nptl/sysdeps/unix/sysv/linux/raise.c:56
#1  0x00007ffff759a4c8 in __GI_abort () at abort.c:89
#2  0x00007ffff75904c6 in __assert_fail_base (fmt=0x7ffff76c7668 "%s%s%s:%u:
%s%sAssertion `%s' failed.\n%n", 
    assertion=assertion@entry=0x7ffff44c6b40 "ir->operands[0]->type ==
ir->operands[1]->type", file=file@entry=0x7ffff44ee9d8
"../../../src/glsl/ir_validate.cpp", line=line@entry=436, 
    function=function@entry=0x7ffff44efd80 <(anonymous
namespace)::ir_validate::visit_leave(ir_expression*)::__PRETTY_FUNCTION__>
"virtual ir_visitor_status
{anonymous}::ir_validate::visit_leave(ir_expression*)") at assert.c:92
#3  0x00007ffff7590572 in __GI___assert_fail (assertion=0x7ffff44c6b40
"ir->operands[0]->type == ir->operands[1]->type", file=0x7ffff44ee9d8
"../../../src/glsl/ir_validate.cpp", line=436, 
    function=0x7ffff44efd80 <(anonymous
namespace)::ir_validate::visit_leave(ir_expression*)::__PRETTY_FUNCTION__>
"virtual ir_visitor_status
{anonymous}::ir_validate::visit_leave(ir_expression*)") at assert.c:101
#4  0x00007ffff42e57b1 in (anonymous namespace)::ir_validate::visit_leave
(this=<optimized out>, ir=<optimized out>) at
../../../src/glsl/ir_validate.cpp:436
#5  0x00007ffff42e2fdf in ir_assignment::accept (this=0xaaa360,
v=0x7fffffffe420) at ../../../src/glsl/ir_hv_accept.cpp:308
#6  0x00007ffff42e2a16 in visit_list_elements (v=v@entry=0x7fffffffe420,
l=l@entry=0xaa95e8, statement_list=statement_list@entry=true) at
../../../src/glsl/ir_hv_accept.cpp:56
#7  0x00007ffff42e3204 in ir_if::accept (this=0xaa95c0, v=0x7fffffffe420) at
../../../src/glsl/ir_hv_accept.cpp:391
#8  0x00007ffff42e2a16 in visit_list_elements (v=v@entry=0x7fffffffe420,
l=l@entry=0x732698, statement_list=statement_list@entry=true) at
../../../src/glsl/ir_hv_accept.cpp:56
#9  0x00007ffff42e2b79 in ir_function_signature::accept (this=0x732650,
v=0x7fffffffe420) at ../../../src/glsl/ir_hv_accept.cpp:116
#10 0x00007ffff42e2a16 in visit_list_elements (v=v@entry=0x7fffffffe420,
l=l@entry=0x7324f8, statement_list=statement_list@entry=false) at
../../../src/glsl/ir_hv_accept.cpp:56
#11 0x00007ffff42e2be7 in ir_function::accept (this=0x7324d0, v=0x7fffffffe420)
at ../../../src/glsl/ir_hv_accept.cpp:128
#12 0x00007ffff42e2a16 in visit_list_elements (v=v@entry=0x7fffffffe420,
l=l@entry=0x6cc4a0, statement_list=statement_list@entry=true) at
../../../src/glsl/ir_hv_accept.cpp:56
#13 0x00007ffff42e293f in ir_hierarchical_visitor::run
(this=this@entry=0x7fffffffe420, instructions=instructions@entry=0x6cc4a0) at
../../../src/glsl/ir_hierarchical_visitor.cpp:309
#14 0x00007ffff42e7ae0 in validate_ir_tree (instructions=0x6cc4a0) at
../../../src/glsl/ir_validate.cpp:817
#15 0x00007ffff42d3d2b in _mesa_glsl_compile_shader
(ctx=ctx@entry=0x7ffff7fd4010, shader=shader@entry=0x6c1ea0,
dump_ast=dump_ast@entry=false, dump_hir=dump_hir@entry=false)
    at ../../../src/glsl/glsl_parser_extras.cpp:1470
#16 0x00007ffff41aa481 in compile_shader (ctx=0x7ffff7fd4010,
shaderObj=<optimized out>) at ../../../src/mesa/main/shaderapi.c:850
#17 0x0000000000401c4f in create_shader ()
#18 0x0000000000402073 in init_resources ()
#19 0x00000000004027ec in main ()

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[Bug 79504] LLVM error on fragment shader

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=79504

Timothy Arceri <t_arceri@yahoo.com.au> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|idr@freedesktop.org         |dri-devel@lists.freedesktop
                   |                            |.org
         QA Contact|intel-3d-bugs@lists.freedes |dri-devel@lists.freedesktop
                   |ktop.org                    |.org
          Component|glsl-compiler               |Drivers/Gallium/radeonsi

--- Comment #16 from Timothy Arceri <t_arceri@yahoo.com.au> ---
Test program no longer hits any issues in the glsl compiler, and program runs
on i965. The program says My First Triangle but has a couple of squares, I'm
assuming that's just an issue with the program rather than Mesa.

Reassigning to radeonsi for further testing.

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[Bug 79504] LLVM error on fragment shader

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https://bugs.freedesktop.org/show_bug.cgi?id=79504

Michel Dänzer <michel@daenzer.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
             Status|NEW                         |RESOLVED

--- Comment #17 from Michel Dänzer <michel@daenzer.net> ---
Thanks guys. Works for me with radeonsi as well now, if it still doesn't for
you Kyle, please reopen with current glxinfo output.

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[Bug 79504] LLVM error on fragment shader

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https://bugs.freedesktop.org/show_bug.cgi?id=79504

--- Comment #18 from Kyle Blake <kyle@klkblake.com> ---
Confirming that it works for me.

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