freedreno/ir3: cleanup after lower_locals_to_regs

Signed-off-by: Rob Clark <[email protected]>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3569>

1 files changed, 17 insertions, 8 deletions

diff --git a/src/freedreno/ir3/ir3_context.c b/src/freedreno/ir3/ir3_context.c
index 334b0ae0bab..33e73bcb216 100644
--- a/src/freedreno/ir3/ir3_context.c
+++ b/src/freedreno/ir3/ir3_context.c
@@ -79,21 +79,30 @@ ir3_context_init(struct ir3_compiler *compiler,
 	 * in ir3_optimize_nir():
 	 */
 	NIR_PASS_V(ctx->s, nir_lower_bool_to_int32);
-	NIR_PASS_V(ctx->s, nir_lower_locals_to_regs);
+	bool progress = false;
+	NIR_PASS(progress, ctx->s, nir_lower_locals_to_regs);
+
+	/* we could need cleanup after lower_locals_to_regs */
+	while (progress) {
+		progress = false;
+		NIR_PASS(progress, ctx->s, nir_opt_algebraic);
+		NIR_PASS(progress, ctx->s, nir_opt_constant_folding);
+	}
 
 	/* We want to lower nir_op_imul as late as possible, to catch also
 	 * those generated by earlier passes (e.g, nir_lower_locals_to_regs).
 	 * However, we want a final swing of a few passes to have a chance
 	 * at optimizing the result.
 	 */
-	bool progress = false;
+	progress = false;
 	NIR_PASS(progress, ctx->s, ir3_nir_lower_imul);
-	if (progress) {
-		NIR_PASS_V(ctx->s, nir_opt_algebraic);
-		NIR_PASS_V(ctx->s, nir_opt_copy_prop_vars);
-		NIR_PASS_V(ctx->s, nir_opt_dead_write_vars);
-		NIR_PASS_V(ctx->s, nir_opt_dce);
-		NIR_PASS_V(ctx->s, nir_opt_constant_folding);
+	while (progress) {
+		progress = false;
+		NIR_PASS(progress, ctx->s, nir_opt_algebraic);
+		NIR_PASS(progress, ctx->s, nir_opt_copy_prop_vars);
+		NIR_PASS(progress, ctx->s, nir_opt_dead_write_vars);
+		NIR_PASS(progress, ctx->s, nir_opt_dce);
+		NIR_PASS(progress, ctx->s, nir_opt_constant_folding);
 	}
 
 	/* Enable the texture pre-fetch feature only a4xx onwards.  But