[PATCH vkd3d v8 3/4] vkd3d-shader/hlsl: Handle loops in copy propagation.

[Giovanni Mascellani]

Signed-off-by: Giovanni Mascellani 
---
 libs/vkd3d-shader/hlsl_codegen.c | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/libs/vkd3d-shader/hlsl_codegen.c b/libs/vkd3d-shader/hlsl_codegen.c
index 8d0dc92e..367e854b 100644
--- a/libs/vkd3d-shader/hlsl_codegen.c
+++ b/libs/vkd3d-shader/hlsl_codegen.c
@@ -518,6 +518,22 @@ end:
     return progress;
 }

+static bool copy_propagation_process_loop(struct hlsl_ctx *ctx, struct hlsl_ir_loop *loop,
+        struct copy_propagation_state *state)
+{
+    bool progress = false;
+
+    copy_propagation_invalidate_from_block(ctx, state, &loop->body);
+    if (!copy_propagation_duplicate(ctx, state))
+        return progress;
+
+    progress |= copy_propagation_transform_block(ctx, &loop->body, state);
+
+    copy_propagation_pop(state);
+
+    return progress;
+}
+
 static bool copy_propagation_transform_block(struct hlsl_ctx *ctx, struct hlsl_block *block,
         struct copy_propagation_state *state)
 {
@@ -541,7 +557,7 @@ static bool copy_propagation_transform_block(struct hlsl_ctx *ctx, struct hlsl_b
                 return progress;

case HLSL_IR_LOOP:
-                FIXME("Copy propagation doesn't support loops yet, leaving.\n");
+                progress |= copy_propagation_process_loop(ctx, hlsl_ir_loop(instr), state);
                 return progress;

default: