Mesa (master): aco: don't split store data if it was already split into more elements
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Thu Jul 23 18:31:35 UTC 2020
Module: Mesa
Branch: master
Commit: 626081fe4bf653a18cff9e25e6da2636bc58774a
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=626081fe4bf653a18cff9e25e6da2636bc58774a
Author: Daniel Schürmann <daniel at schuermann.dev>
Date: Wed Jul 22 18:41:53 2020 +0200
aco: don't split store data if it was already split into more elements
Cc: 20.1 <mesa-stable at lists.freedesktop.org>
Reviewed-by: Rhys Perry <pendingchaos02 at gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6024>
---
src/amd/compiler/aco_instruction_selection.cpp | 15 +++++++++------
1 file changed, 9 insertions(+), 6 deletions(-)
diff --git a/src/amd/compiler/aco_instruction_selection.cpp b/src/amd/compiler/aco_instruction_selection.cpp
index 1d7aae1be2e..80ea1e133d6 100644
--- a/src/amd/compiler/aco_instruction_selection.cpp
+++ b/src/amd/compiler/aco_instruction_selection.cpp
@@ -3678,13 +3678,15 @@ void split_store_data(isel_context *ctx, RegType dst_type, unsigned count, Temp
/* use allocated_vec if possible */
auto it = ctx->allocated_vec.find(src.id());
if (it != ctx->allocated_vec.end()) {
- unsigned total_size = 0;
- for (unsigned i = 0; it->second[i].bytes() && (i < NIR_MAX_VEC_COMPONENTS); i++)
- total_size += it->second[i].bytes();
- if (total_size != src.bytes())
+ if (!it->second[0].id())
goto split;
-
unsigned elem_size = it->second[0].bytes();
+ assert(src.bytes() % elem_size == 0);
+
+ for (unsigned i = 0; i < src.bytes() / elem_size; i++) {
+ if (!it->second[i].id())
+ goto split;
+ }
for (unsigned i = 0; i < count; i++) {
if (offsets[i] % elem_size || dst[i].bytes() % elem_size)
@@ -3716,10 +3718,11 @@ void split_store_data(isel_context *ctx, RegType dst_type, unsigned count, Temp
}
}
+ split:
+
if (dst_type == RegType::sgpr)
src = bld.as_uniform(src);
- split:
/* just split it */
aco_ptr<Instruction> split{create_instruction<Pseudo_instruction>(aco_opcode::p_split_vector, Format::PSEUDO, 1, count)};
split->operands[0] = Operand(src);
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