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authorBrian Paul <brianp@vmware.com>2009-06-24 08:40:56 -0600
committerBrian Paul <brianp@vmware.com>2009-06-26 13:16:33 -0600
commit3c6480ea42298ae46413ebfacca13100cfefaed2 (patch)
tree035adac2c60c621c3740b5c939d683134eefa5b9 /src
parentfc0896b50b8458a503eac8945dbb1f3e29b08990 (diff)
glsl: check-point: declare _returnFlag
Diffstat (limited to 'src')
-rw-r--r--src/mesa/shader/slang/slang_codegen.c33
1 files changed, 33 insertions, 0 deletions
diff --git a/src/mesa/shader/slang/slang_codegen.c b/src/mesa/shader/slang/slang_codegen.c
index d594650c5b..3b58ee4cbd 100644
--- a/src/mesa/shader/slang/slang_codegen.c
+++ b/src/mesa/shader/slang/slang_codegen.c
@@ -1391,6 +1391,27 @@ slang_inline_function_call(slang_assemble_ctx * A, slang_function *fun,
}
+/**
+ * Insert declaration for "bool _returnFlag" in given block operation.
+ * This is used when we can't emit "early" return statements in subroutines.
+ */
+static void
+declare_return_flag(slang_assemble_ctx *A, slang_operation *oper)
+{
+ slang_operation *decl;
+
+ assert(oper->type == SLANG_OPER_BLOCK_NEW_SCOPE ||
+ oper->type == SLANG_OPER_SEQUENCE);
+
+ decl = slang_operation_insert_child(oper, 1);
+
+ slang_generate_declaration(A, oper->locals, decl,
+ SLANG_SPEC_BOOL, "_returnFlag", GL_FALSE);
+
+ slang_print_tree(oper, 0);
+}
+
+
static slang_ir_node *
_slang_gen_function_call(slang_assemble_ctx *A, slang_function *fun,
slang_operation *oper, slang_operation *dest)
@@ -1453,6 +1474,18 @@ _slang_gen_function_call(slang_assemble_ctx *A, slang_function *fun,
else {
callOper = inlined;
}
+
+ if (!A->EmitContReturn) {
+ /* Early returns not supported. Create a _returnFlag variable
+ * that's set upon 'return' and tested elsewhere to no-op any
+ * remaining instructions in the subroutine.
+ */
+ assert(callOper->type == SLANG_OPER_BLOCK_NEW_SCOPE ||
+ callOper->type == SLANG_OPER_SEQUENCE);
+ declare_return_flag(A, callOper);
+ printf("DECLARE _returnFlag\n");
+
+ }
callOper->type = SLANG_OPER_NON_INLINED_CALL;
callOper->fun = fun;
callOper->label = _slang_label_new_unique((char*) fun->header.a_name);