diff options
| -rw-r--r-- | src/mesa/shader/slang/slang_emit.c | 134 |
1 files changed, 81 insertions, 53 deletions
diff --git a/src/mesa/shader/slang/slang_emit.c b/src/mesa/shader/slang/slang_emit.c index f0c3791f2a1..cad983443a7 100644 --- a/src/mesa/shader/slang/slang_emit.c +++ b/src/mesa/shader/slang/slang_emit.c @@ -1636,6 +1636,84 @@ emit_struct_field(slang_emit_info *emitInfo, slang_ir_node *n) } +/** + * Emit code for a variable declaration. + * This usually doesn't result in any code generation, but just + * memory allocation. + */ +static struct prog_instruction * +emit_var_decl(slang_emit_info *emitInfo, slang_ir_node *n) +{ + struct prog_instruction *inst; + + assert(n->Store); + assert(n->Store->File != PROGRAM_UNDEFINED); + assert(n->Store->Size > 0); + /*assert(n->Store->Index < 0);*/ + + if (!n->Var || n->Var->isTemp) { + /* a nameless/temporary variable, will be freed after first use */ + /*NEW*/ + if (n->Store->Index < 0 && !_slang_alloc_temp(emitInfo->vt, n->Store)) { + slang_info_log_error(emitInfo->log, + "Ran out of registers, too many temporaries"); + return NULL; + } + } + else { + /* a regular variable */ + _slang_add_variable(emitInfo->vt, n->Var); + if (!_slang_alloc_var(emitInfo->vt, n->Store)) { + slang_info_log_error(emitInfo->log, + "Ran out of registers, too many variables"); + return NULL; + } + /* + printf("IR_VAR_DECL %s %d store %p\n", + (char*) n->Var->a_name, n->Store->Index, (void*) n->Store); + */ + assert(n->Var->aux == n->Store); + } + if (emitInfo->EmitComments) { + /* emit NOP with comment describing the variable's storage location */ + char s[1000]; + sprintf(s, "TEMP[%d]%s = variable %s (size %d)", + n->Store->Index, + _mesa_swizzle_string(n->Store->Swizzle, 0, GL_FALSE), + (n->Var ? (char *) n->Var->a_name : "anonymous"), + n->Store->Size); + inst = emit_comment(emitInfo, s); + return inst; + } + return NULL; +} + + +/** + * Emit code for a reference to a variable. + * Actually, no code is generated but we may do some memory alloation. + * In particular, state vars (uniforms) are allocated on an as-needed basis. + */ +static struct prog_instruction * +emit_var_ref(slang_emit_info *emitInfo, slang_ir_node *n) +{ + assert(n->Store); + assert(n->Store->File != PROGRAM_UNDEFINED); + + if (n->Store->File == PROGRAM_STATE_VAR && n->Store->Index < 0) { + n->Store->Index = _slang_alloc_statevar(n, emitInfo->prog->Parameters); + } + + if (n->Store->Index < 0) { + /* probably ran out of registers */ + return NULL; + } + assert(n->Store->Size > 0); + + return NULL; +} + + static struct prog_instruction * emit(slang_emit_info *emitInfo, slang_ir_node *n) { @@ -1671,64 +1749,14 @@ emit(slang_emit_info *emitInfo, slang_ir_node *n) case IR_VAR_DECL: /* Variable declaration - allocate a register for it */ - assert(n->Store); - assert(n->Store->File != PROGRAM_UNDEFINED); - assert(n->Store->Size > 0); - /*assert(n->Store->Index < 0);*/ - if (!n->Var || n->Var->isTemp) { - /* a nameless/temporary variable, will be freed after first use */ - /*NEW*/ - if (n->Store->Index < 0 && !_slang_alloc_temp(emitInfo->vt, n->Store)) { - slang_info_log_error(emitInfo->log, - "Ran out of registers, too many temporaries"); - return NULL; - } - } - else { - /* a regular variable */ - _slang_add_variable(emitInfo->vt, n->Var); - if (!_slang_alloc_var(emitInfo->vt, n->Store)) { - slang_info_log_error(emitInfo->log, - "Ran out of registers, too many variables"); - return NULL; - } - /* - printf("IR_VAR_DECL %s %d store %p\n", - (char*) n->Var->a_name, n->Store->Index, (void*) n->Store); - */ - assert(n->Var->aux == n->Store); - } - if (emitInfo->EmitComments) { - /* emit NOP with comment describing the variable's storage location */ - char s[1000]; - sprintf(s, "TEMP[%d]%s = variable %s (size %d)", - n->Store->Index, - _mesa_swizzle_string(n->Store->Swizzle, 0, GL_FALSE), - (n->Var ? (char *) n->Var->a_name : "anonymous"), - n->Store->Size); - inst = emit_comment(emitInfo, s); - return inst; - } - return NULL; + inst = emit_var_decl(emitInfo, n); + return inst; case IR_VAR: /* Reference to a variable * Storage should have already been resolved/allocated. */ - assert(n->Store); - assert(n->Store->File != PROGRAM_UNDEFINED); - - if (n->Store->File == PROGRAM_STATE_VAR && - n->Store->Index < 0) { - n->Store->Index = _slang_alloc_statevar(n, emitInfo->prog->Parameters); - } - - if (n->Store->Index < 0) { - /* probably ran out of registers */ - return NULL; - } - assert(n->Store->Size > 0); - break; + return emit_var_ref(emitInfo, n); case IR_ELEMENT: return emit_array_element(emitInfo, n); |