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r300: fix uninitialized use in transform_vertex_ROUND

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==26468== Conditional jump or move depends on uninitialised value(s)
==26468==    at 0x577A190: get_readers_normal_read_callback (radeon_dataflow.c:534)
==26468==    by 0x57795E7: rc_for_all_reads_src (radeon_dataflow.c:162)
==26468==    by 0x577A7BB: get_readers_for_single_write (radeon_dataflow.c:709)
==26468==    by 0x5779763: writes_normal (radeon_dataflow.c:212)
==26468==    by 0x5779870: rc_for_all_writes_mask (radeon_dataflow.c:243)
==26468==    by 0x577A93C: rc_get_readers (radeon_dataflow.c:819)
==26468==    by 0x577E35E: transform_vertex_ROUND (radeon_optimize.c:1332)
==26468==    by 0x577E48B: optimize_A0_loads (radeon_optimize.c:1367)
==26468==    by 0x577E53E: rc_optimize (radeon_optimize.c:1393)
==26468==    by 0x577767F: rc_run_compiler_passes (radeon_compiler.c:475)
==26468==    by 0x57777C2: rc_run_compiler (radeon_compiler.c:498)
==26468==    by 0x57747F3: r3xx_compile_vertex_program (r3xx_vertprog.c:820)

Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/10562
Signed-off-by: Pavel Ondračka <pavel.ondracka@gmail.com>
Reviewed-by: Filip Gawin <None>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33210>
This commit is contained in:
Pavel Ondračka 2024-10-14 20:30:24 +02:00 • committed by Marge Bot
parent 6768eb31e5
commit ba860bd914
1 changed files with 1 additions and 0 deletions
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src/gallium/drivers/r300/compiler/radeon_optimize.c
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@ -1329,6 +1329,7 @@ static void
transform_vertex_ROUND(struct radeon_compiler *c, struct rc_instruction *inst)
{
struct rc_reader_data readers;
readers.ExitOnAbort = 0;
rc_get_readers(c, inst, &readers, NULL, NULL, NULL);
assert(readers.ReaderCount > 0);