[PATCH vkd3d v5 1/6] vkd3d-shader/hlsl: Remove trivial swizzles.
Giovanni Mascellani
gmascellani at codeweavers.com
Mon Nov 15 08:27:11 CST 2021
Signed-off-by: Giovanni Mascellani <gmascellani at codeweavers.com>
---
libs/vkd3d-shader/hlsl_codegen.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/libs/vkd3d-shader/hlsl_codegen.c b/libs/vkd3d-shader/hlsl_codegen.c
index 24b8205c..f8b977b0 100644
--- a/libs/vkd3d-shader/hlsl_codegen.c
+++ b/libs/vkd3d-shader/hlsl_codegen.c
@@ -475,6 +475,27 @@ static bool fold_constants(struct hlsl_ctx *ctx, struct hlsl_ir_node *instr, voi
return true;
}
+static bool remove_trivial_swizzles(struct hlsl_ctx *ctx, struct hlsl_ir_node *instr, void *context)
+{
+ struct hlsl_ir_swizzle *swizzle;
+ unsigned int i;
+
+ if (instr->type != HLSL_IR_SWIZZLE)
+ return false;
+ swizzle = hlsl_ir_swizzle(instr);
+
+ if (instr->data_type->dimx != swizzle->val.node->data_type->dimx)
+ return false;
+
+ for (i = 0; i < instr->data_type->dimx; ++i)
+ if (((swizzle->swizzle >> (2 * i)) & 3) != i)
+ return false;
+
+ replace_node(instr, swizzle->val.node);
+
+ return true;
+}
+
/* Lower DIV to RCP + MUL. */
static bool lower_division(struct hlsl_ctx *ctx, struct hlsl_ir_node *instr, void *context)
{
@@ -1355,6 +1376,7 @@ int hlsl_emit_dxbc(struct hlsl_ctx *ctx, struct hlsl_ir_function_decl *entry_fun
}
while (progress);
while (transform_ir(ctx, fold_constants, body, NULL));
+ transform_ir(ctx, remove_trivial_swizzles, body, NULL);
if (ctx->profile->major_version < 4)
transform_ir(ctx, lower_division, body, NULL);
--
2.33.1
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