[PATCH vkd3d 4/5] vkd3d-shader: Fold redundant casts.
Zebediah Figura
zfigura at codeweavers.com
Tue Mar 16 16:31:55 CDT 2021
Signed-off-by: Zebediah Figura <zfigura at codeweavers.com>
---
libs/vkd3d-shader/hlsl_codegen.c | 19 ++++++++++++++++++-
1 file changed, 18 insertions(+), 1 deletion(-)
diff --git a/libs/vkd3d-shader/hlsl_codegen.c b/libs/vkd3d-shader/hlsl_codegen.c
index 22ad3ed0..2df88f57 100644
--- a/libs/vkd3d-shader/hlsl_codegen.c
+++ b/libs/vkd3d-shader/hlsl_codegen.c
@@ -53,11 +53,26 @@ static void replace_node(struct hlsl_ir_node *old, struct hlsl_ir_node *new)
hlsl_src_remove(src);
hlsl_src_from_node(src, new);
}
- list_add_before(&old->entry, &new->entry);
list_remove(&old->entry);
hlsl_free_instr(old);
}
+static bool fold_redundant_casts(struct hlsl_ctx *ctx, struct hlsl_ir_node *instr, void *context)
+{
+ if (instr->type == HLSL_IR_EXPR)
+ {
+ struct hlsl_ir_expr *expr = hlsl_ir_expr(instr);
+
+ if (expr->op == HLSL_IR_UNOP_CAST && hlsl_type_compare(expr->node.data_type, expr->operands[0].node->data_type))
+ {
+ replace_node(&expr->node, expr->operands[0].node);
+ return true;
+ }
+ }
+
+ return false;
+}
+
static bool fold_constants(struct hlsl_ctx *ctx, struct hlsl_ir_node *instr, void *context)
{
struct hlsl_ir_constant *arg1, *arg2 = NULL, *res;
@@ -116,6 +131,7 @@ static bool fold_constants(struct hlsl_ctx *ctx, struct hlsl_ir_node *instr, voi
return false;
}
+ list_add_before(&expr->node.entry, &res->node.entry);
replace_node(&expr->node, &res->node);
return true;
}
@@ -289,6 +305,7 @@ int hlsl_emit_dxbc(struct hlsl_ctx *ctx, struct hlsl_ir_function_decl *entry_fun
{
list_move_head(entry_func->body, &ctx->static_initializers);
+ while (transform_ir(ctx, fold_redundant_casts, entry_func->body, NULL));
while (transform_ir(ctx, fold_constants, entry_func->body, NULL));
while (transform_ir(ctx, dce, entry_func->body, NULL));
--
2.30.1
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