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vkd3d-shader/hlsl: Fold swizzle chains.

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This commit is contained in:
Francisco Casas
2022-12-09 19:23:41 -03:00
committed by Alexandre Julliard
parent b7d34e8307
commit 6b82ba9488
Notes: Alexandre Julliard 2023-01-24 22:27:58 +01:00 
Approved-by: Giovanni Mascellani (@giomasce)
Approved-by: Zebediah Figura (@zfigura)
Approved-by: Henri Verbeet (@hverbeet)
Approved-by: Alexandre Julliard (@julliard)
Merge-Request: https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/51
2 changed files with 40 additions and 6 deletions
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34
libs/vkd3d-shader/hlsl_codegen.c
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@@ -1419,6 +1419,39 @@ static bool lower_narrowing_casts(struct hlsl_ctx *ctx, struct hlsl_ir_node *ins
return false;
}
static bool fold_swizzle_chains(struct hlsl_ctx *ctx, struct hlsl_ir_node *instr, void *context)
{
struct hlsl_ir_swizzle *swizzle;
struct hlsl_ir_node *next_instr;
if (instr->type != HLSL_IR_SWIZZLE)
return false;
swizzle = hlsl_ir_swizzle(instr);
next_instr = swizzle->val.node;
if (next_instr->type == HLSL_IR_SWIZZLE)
{
struct hlsl_ir_swizzle *new_swizzle;
struct hlsl_ir_node *new_instr;
unsigned int combined_swizzle;
combined_swizzle = hlsl_combine_swizzles(hlsl_ir_swizzle(next_instr)->swizzle,
swizzle->swizzle, instr->data_type->dimx);
next_instr = hlsl_ir_swizzle(next_instr)->val.node;
if (!(new_swizzle = hlsl_new_swizzle(ctx, combined_swizzle, instr->data_type->dimx, next_instr, &instr->loc)))
return false;
new_instr = &new_swizzle->node;
list_add_before(&instr->entry, &new_instr->entry);
hlsl_replace_node(instr, new_instr);
return true;
}
return false;
}
static bool remove_trivial_swizzles(struct hlsl_ctx *ctx, struct hlsl_ir_node *instr, void *context)
{
struct hlsl_ir_swizzle *swizzle;
@@ -2866,6 +2899,7 @@ int hlsl_emit_bytecode(struct hlsl_ctx *ctx, struct hlsl_ir_function_decl *entry
progress = transform_ir(ctx, hlsl_fold_constant_exprs, body, NULL);
progress |= transform_ir(ctx, hlsl_fold_constant_swizzles, body, NULL);
progress |= copy_propagation_execute(ctx, body);
progress |= transform_ir(ctx, fold_swizzle_chains, body, NULL);
progress |= transform_ir(ctx, remove_trivial_swizzles, body, NULL);
}
while (progress);