Francisco Casas : vkd3d-shader/hlsl: Fold redundant casts again after lower narrowing casts.

[Alexandre Julliard]

Module: vkd3d
Branch: master
Commit: 5dee6561c2a9aeeb951cc9786a8b28eebf8adc4d
URL:    https://gitlab.winehq.org/wine/vkd3d/-/commit/5dee6561c2a9aeeb951cc9786a8b28...

Author: Francisco Casas 
Date:   Wed Jun  7 15:55:31 2023 -0400

vkd3d-shader/hlsl: Fold redundant casts again after lower narrowing casts.

lower_narrowing_casts() currently creates a new cast calling
hlsl_new_cast(). This cast may be redundant, but it is not folded, which
is making SM1 emit an unnecessary fixme in some shaders:

Aborting due to not yet implemented feature: SM1 "cast" expression.

Other passes that call hlsl_new_cast() are lower_int_division() and
lower_int_modulus(), so the new fold_redundant_casts() pass is called
after these as well.

---

libs/vkd3d-shader/hlsl_codegen.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libs/vkd3d-shader/hlsl_codegen.c b/libs/vkd3d-shader/hlsl_codegen.c
index 20d8f0ae..4317604b 100644
--- a/libs/vkd3d-shader/hlsl_codegen.c
+++ b/libs/vkd3d-shader/hlsl_codegen.c
@@ -4068,6 +4068,7 @@ int hlsl_emit_bytecode(struct hlsl_ctx *ctx, struct hlsl_ir_function_decl *entry
     hlsl_transform_ir(ctx, lower_int_modulus, body, NULL);
     hlsl_transform_ir(ctx, lower_int_abs, body, NULL);
     hlsl_transform_ir(ctx, lower_float_modulus, body, NULL);
+    hlsl_transform_ir(ctx, fold_redundant_casts, body, NULL);
     do
     {
         progress = hlsl_transform_ir(ctx, hlsl_fold_constant_exprs, body, NULL);