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mesa/prog: relative offsets into constbufs are not constant

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The optimization logic relies on being able to read out constbuf values
from program parameters. However that only works if there's no relative
addressing involved.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=91173
Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Cc: "10.5 10.6" <mesa-stable@lists.freedesktop.org>
Reviewed-by: Chris Forbes <chrisf@ijw.co.nz>
(cherry picked from commit 197a19f9ed)
This commit is contained in:
Ilia Mirkin 2015-07-01 18:22:23 -04:00 • committed by Emil Velikov
parent 1e8c43f4d0
commit 0b5a9660dc
1 changed files with 2 additions and 0 deletions
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2
src/mesa/program/prog_opt_constant_fold.c
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@ -38,6 +38,8 @@ src_regs_are_constant(const struct prog_instruction *inst, unsigned num_srcs)
for (i = 0; i < num_srcs; i++) {
if (inst->SrcReg[i].File != PROGRAM_CONSTANT)
return false;
if (inst->SrcReg[i].RelAddr)
return false;
}
return true;