Mesa (master): radv: do not emit unnecessary GS output stores
Samuel Pitoiset
hakzsam at kemper.freedesktop.org
Thu May 17 12:13:56 UTC 2018
Module: Mesa
Branch: master
Commit: a6e44d12714871193ef130845b1f8727ffdbf01e
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=a6e44d12714871193ef130845b1f8727ffdbf01e
Author: Samuel Pitoiset <samuel.pitoiset at gmail.com>
Date: Wed May 16 17:43:22 2018 +0200
radv: do not emit unnecessary GS output stores
Signed-off-by: Samuel Pitoiset <samuel.pitoiset at gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas at basnieuwenhuizen.nl>
---
src/amd/vulkan/radv_nir_to_llvm.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/src/amd/vulkan/radv_nir_to_llvm.c b/src/amd/vulkan/radv_nir_to_llvm.c
index b4af0f2941..05ae709685 100644
--- a/src/amd/vulkan/radv_nir_to_llvm.c
+++ b/src/amd/vulkan/radv_nir_to_llvm.c
@@ -1684,6 +1684,8 @@ visit_emit_vertex(struct ac_shader_abi *abi, unsigned stream, LLVMValueRef *addr
/* loop num outputs */
idx = 0;
for (unsigned i = 0; i < AC_LLVM_MAX_OUTPUTS; ++i) {
+ unsigned output_usage_mask =
+ ctx->shader_info->info.gs.output_usage_mask[i];
LLVMValueRef *out_ptr = &addrs[i * 4];
int length = 4;
int slot = idx;
@@ -1697,8 +1699,13 @@ visit_emit_vertex(struct ac_shader_abi *abi, unsigned stream, LLVMValueRef *addr
length = ctx->num_output_clips + ctx->num_output_culls;
if (length > 4)
slot_inc = 2;
+ output_usage_mask = (1 << length) - 1;
}
+
for (unsigned j = 0; j < length; j++) {
+ if (!(output_usage_mask & (1 << j)))
+ continue;
+
LLVMValueRef out_val = LLVMBuildLoad(ctx->ac.builder,
out_ptr[j], "");
LLVMValueRef voffset = LLVMConstInt(ctx->ac.i32, (slot * 4 + j) * ctx->gs_max_out_vertices, false);
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