fdo-mirrors/mesa
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/mesa/mesa.git synced 2025-12-30 23:00:11 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

glsl: check-point: declare _returnFlag

Browse source
This commit is contained in:
Brian Paul 2009-06-24 08:40:56 -06:00
parent fc0896b50b
commit 3c6480ea42
1 changed files with 33 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

33
src/mesa/shader/slang/slang_codegen.c
View file

@ -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);