glsl: Allow vectors to be created from ir_constant().

Note the parameter name change in the int version of ir_constant, to
avoid the conflict with the loop iterator.

v2: Make analogous change to builtin_builder::imm().
Reviewed-by: Paul Berry <stereotype441@gmail.com>

src/glsl/builtin_functions.cpp

@@ -348,9 +348,9 @@ private:
     */
    ir_variable *in_var(const glsl_type *type, const char *name);
    ir_variable *out_var(const glsl_type *type, const char *name);
-   ir_constant *imm(float f);
-   ir_constant *imm(int i);
-   ir_constant *imm(unsigned u);
+   ir_constant *imm(float f, unsigned vector_elements=1);
+   ir_constant *imm(int i, unsigned vector_elements=1);
+   ir_constant *imm(unsigned u, unsigned vector_elements=1);
    ir_constant *imm(const glsl_type *type, const ir_constant_data &);
    ir_dereference_variable *var_ref(ir_variable *var);
    ir_dereference_array *array_ref(ir_variable *var, int i);
@@ -1878,21 +1878,21 @@ builtin_builder::out_var(const glsl_type *type, const char *name)
 }
 
 ir_constant *
-builtin_builder::imm(float f)
+builtin_builder::imm(float f, unsigned vector_elements)
 {
-   return new(mem_ctx) ir_constant(f);
+   return new(mem_ctx) ir_constant(f, vector_elements);
 }
 
 ir_constant *
-builtin_builder::imm(int i)
+builtin_builder::imm(int i, unsigned vector_elements)
 {
-   return new(mem_ctx) ir_constant(i);
+   return new(mem_ctx) ir_constant(i, vector_elements);
 }
 
 ir_constant *
-builtin_builder::imm(unsigned u)
+builtin_builder::imm(unsigned u, unsigned vector_elements)
 {
-   return new(mem_ctx) ir_constant(u);
+   return new(mem_ctx) ir_constant(u, vector_elements);
 }
 
 ir_constant *

src/glsl/ir.cpp

@@ -619,42 +619,54 @@ ir_constant::ir_constant(const struct glsl_type *type,
    memcpy(& this->value, data, sizeof(this->value));
 }
 
-ir_constant::ir_constant(float f)
+ir_constant::ir_constant(float f, unsigned vector_elements)
 {
+   assert(vector_elements <= 4);
    this->ir_type = ir_type_constant;
-   this->type = glsl_type::float_type;
-   this->value.f[0] = f;
-   for (int i = 1; i < 16; i++)  {
+   this->type = glsl_type::get_instance(GLSL_TYPE_FLOAT, vector_elements, 1);
+   for (unsigned i = 0; i < vector_elements; i++) {
+      this->value.f[i] = f;
+   }
+   for (unsigned i = vector_elements; i < 16; i++)  {
       this->value.f[i] = 0;
    }
 }
 
-ir_constant::ir_constant(unsigned int u)
+ir_constant::ir_constant(unsigned int u, unsigned vector_elements)
 {
+   assert(vector_elements <= 4);
    this->ir_type = ir_type_constant;
-   this->type = glsl_type::uint_type;
-   this->value.u[0] = u;
-   for (int i = 1; i < 16; i++) {
+   this->type = glsl_type::get_instance(GLSL_TYPE_UINT, vector_elements, 1);
+   for (unsigned i = 0; i < vector_elements; i++) {
+      this->value.u[i] = u;
+   }
+   for (unsigned i = vector_elements; i < 16; i++) {
       this->value.u[i] = 0;
    }
 }
 
-ir_constant::ir_constant(int i)
+ir_constant::ir_constant(int integer, unsigned vector_elements)
 {
+   assert(vector_elements <= 4);
    this->ir_type = ir_type_constant;
-   this->type = glsl_type::int_type;
-   this->value.i[0] = i;
-   for (int i = 1; i < 16; i++) {
+   this->type = glsl_type::get_instance(GLSL_TYPE_INT, vector_elements, 1);
+   for (unsigned i = 0; i < vector_elements; i++) {
+      this->value.i[i] = integer;
+   }
+   for (unsigned i = vector_elements; i < 16; i++) {
       this->value.i[i] = 0;
    }
 }
 
-ir_constant::ir_constant(bool b)
+ir_constant::ir_constant(bool b, unsigned vector_elements)
 {
+   assert(vector_elements <= 4);
    this->ir_type = ir_type_constant;
-   this->type = glsl_type::bool_type;
-   this->value.b[0] = b;
-   for (int i = 1; i < 16; i++) {
+   this->type = glsl_type::get_instance(GLSL_TYPE_BOOL, vector_elements, 1);
+   for (unsigned i = 0; i < vector_elements; i++) {
+      this->value.b[i] = b;
+   }
+   for (unsigned i = vector_elements; i < 16; i++) {
       this->value.b[i] = false;
    }
 }

src/glsl/ir.h

@@ -1922,10 +1922,10 @@ union ir_constant_data {
 class ir_constant : public ir_rvalue {
 public:
    ir_constant(const struct glsl_type *type, const ir_constant_data *data);
-   ir_constant(bool b);
-   ir_constant(unsigned int u);
-   ir_constant(int i);
-   ir_constant(float f);
+   ir_constant(bool b, unsigned vector_elements=1);
+   ir_constant(unsigned int u, unsigned vector_elements=1);
+   ir_constant(int i, unsigned vector_elements=1);
+   ir_constant(float f, unsigned vector_elements=1);
 
    /**
     * Construct an ir_constant from a list of ir_constant values