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aco: Don't allow any VALU instruction to write m0.

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Fixes: d5398b62da
Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
Reviewed-by: Georg Lehmann <dadschoorse@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22885>
This commit is contained in:
Timur Kristóf
2023-05-06 17:03:22 +02:00
committed by Marge Bot
parent c140a456b7
commit 16a05f1903
3 changed files with 7 additions and 6 deletions
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src/amd/compiler/aco_ir.cpp
+5 -4
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@@ -480,22 +480,23 @@ can_use_opsel(amd_gfx_level gfx_level, aco_opcode op, int idx)
}
bool
can_write_m0(amd_gfx_level gfx_level, const aco_ptr<Instruction>& instr)
can_write_m0(const aco_ptr<Instruction>& instr)
{
if (instr->isSALU())
return true;
/* VALU can't write m0 on any GPU generations. */
if (instr->isVALU())
return gfx_level >= GFX9;
return false;
switch (instr->opcode) {
case aco_opcode::p_parallelcopy:
case aco_opcode::p_extract:
case aco_opcode::p_insert:
/* These pseudo instructions are implemented with SALU when writing m0. */
return true;
case aco_opcode::p_reload:
return gfx_level >= GFX9;
default:
/* Assume that no other instructions can write m0. */
return false;
}
}