[Bug 93681] GLSL compilation can be very slow

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93681

--- Comment #17 from Eero Tamminen <eero.t.tamminen at intel.com> ---
It's clear off-by-one access past the end of array:

==14419== Invalid read of size 4
==14419==    at 0x6454A39: fs_reg_alloc::set_spill_costs()
(brw_fs_reg_allocate.cpp:925)
==14419==    by 0x6454B26: fs_reg_alloc::choose_spill_reg()
(brw_fs_reg_allocate.cpp:948)
==14419==    by 0x64556FD: fs_reg_alloc::assign_regs(bool, bool)
(brw_fs_reg_allocate.cpp:1163)

==14419==  Address 0x83bdcb4 is 0 bytes after a block of size 10,244 alloc'd
==14419==    at 0x483880B: malloc (vg_replace_malloc.c:309)
==14419==    by 0x5CAF04C: ralloc_size (ralloc.c:119)
==14419==    by 0x5CAF3C1: ralloc_array_size (ralloc.c:221)
==14419==    by 0x64317A9: fs_visitor::calculate_live_intervals()
(brw_fs_live_variables.cpp:335)

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