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* glsl: Add ir_variable fields for explicit bindings.Kenneth Graunke2013-07-181-0/+15
| | | | | | | | | | These are not used yet, but they exist and are copied appropriately. v2: Add an explicit "int binding" variable rather than reusing constant_value, as suggested by Paul Berry. Signed-off-by: Kenneth Graunke <[email protected]> Reviewed-by: Paul Berry <[email protected]>
* glsl: Make _mesa_print_ir() available from anything including ir.h.Eric Anholt2013-06-211-0/+8
| | | | | | | | | | No more forgetting to #include "ir_print_visitor.h" when doing temporary debug code, or forgetting and leaving it in after removing your temporary debug code. Also, available from C code so you don't need to move the caller to C++ just to call it (see also: ir_to_mesa.cpp). Reviewed-by: Kenneth Graunke <[email protected]> Reviewed-by: Paul Berry <[email protected]>
* glsl: Make some files safe to include from CPaul Berry2013-06-211-0/+4
| | | | | Reviewed-by: Eric Anholt <[email protected]> Reviewed-by: Kenneth Graunke <[email protected]>
* glsl: Add ir_triop_vector_insertIan Romanick2013-05-131-1/+10
| | | | | | | | | | | | | | | The new opcode is used to generate a new vector with a single field from the source vector replaced. This will eventually replace ir_dereference_array of vectors in the LHS of assignments. v2: Convert tabs to spaces. Suggested by Eric. v3: Add constant expression handling for ir_triop_vector_insert. This prevents the constant matrix inversion tests from regressing. Duh. Signed-off-by: Ian Romanick <[email protected]> Reviewed-by: Eric Anholt <[email protected]> Reviewed-by: Kenneth Graunke <[email protected]>
* glsl: Add ir_binop_vector_extractIan Romanick2013-05-131-1/+9
| | | | | | | | | | | | | | | | | | | | The new opcode is used to get a single field from a vector. The field index may not be constant. This will eventually replace ir_dereference_array of vectors. This is similar to the extractelement instruction in LLVM IR. http://llvm.org/docs/LangRef.html#extractelement-instruction v2: Convert tabs to spaces. Suggested by Eric. v3: Add array index range checking to ir_binop_vector_extract constant expression handling. Suggested by Ken. v4: Use CLAMP instead of MIN2(MAX2()). Suggested by Ken. Signed-off-by: Ian Romanick <[email protected]> Reviewed-by: Eric Anholt <[email protected]> Reviewed-by: Kenneth Graunke <[email protected]>
* glsl: Add a pass to lower bitfield-insert into bfm+bfi.Matt Turner2013-05-061-0/+18
| | | | | | | | | | i965/Gen7+ and Radeon/Evergreen+ have bfm/bfi instructions to implement bitfieldInsert() from ARB_gpu_shader5. v2: Add ir_binop_bfm and ir_triop_bfi to st_glsl_to_tgsi.cpp. Remove spurious temporary assignment and dereference. Reviewed-by: Chris Forbes <[email protected]>
* glsl: Add support for new bit built-ins in ARB_gpu_shader5.Matt Turner2013-05-061-1/+20
| | | | | | v2: Move use of ir_binop_bfm and ir_triop_bfi to a later patch. Reviewed-by: Chris Forbes <[email protected]>
* glsl: Add virtual function ir_instruction::as_jump()Paul Berry2013-04-241-0/+7
| | | | | Reviewed-by: Matt Turner <[email protected]> Reviewed-by: Kenneth Graunke <[email protected]>
* glsl: Check the size of ir_print_visitor's mode[] array with STATIC_ASSERT.Paul Berry2013-04-091-1/+2
| | | | | | | | | ir_print_visitor::visit(ir_variable *)'s mode[] array needs to match the declaration of the enum ir_variable_mode. It's hard to verify that at compile time, but at least we can use a STATIC_ASSERT to make sure it's the right size. This required adding ir_var_mode_count to the enum.
* glsl: Implement ARB_texture_query_lodDave Airlie2013-03-291-1/+3
| | | | | | | | | | | | | | | | | | | v2 [mattst88]: - Rebase. - #define GL_ARB_texture_query_lod to 1. - Remove comma after ir_lod in ir.h for MSVC. - Handled ir_lod in ir_hv_accept.cpp, ir_rvalue_visitor.cpp, opt_tree_grafting.cpp. - Rename textureQueryLOD to textureQueryLod, see https://www.khronos.org/bugzilla/show_bug.cgi?id=821 - Fix ir_reader of (lod ...). v3 [mattst88]: - Rename textureQueryLod to textureQueryLOD, pending resolution of Khronos 821. - Add ir_lod case to ir_to_mesa.cpp. Reviewed-by: Matt Turner <[email protected]> Reviewed-by: Kenneth Graunke <[email protected]>
* glsl ir: add as_dereference_recordJordan Justen2013-03-251-0/+6
| | | | | Signed-off-by: Jordan Justen <[email protected]> Reviewed-by: Kenneth Graunke <[email protected]>
* Replace gl_frag_attrib enum with gl_varying_slot.Paul Berry2013-03-151-1/+1
| | | | | | | | | | | | This patch makes the following search-and-replace changes: gl_frag_attrib -> gl_varying_slot FRAG_ATTRIB_* -> VARYING_SLOT_* FRAG_BIT_* -> VARYING_BIT_* Reviewed-by: Kenneth Graunke <[email protected]> Reviewed-by: Eric Anholt <[email protected]> Tested-by: Brian Paul <[email protected]>
* Replace gl_vert_result enum with gl_varying_slot.Paul Berry2013-03-151-1/+1
| | | | | | | | | | | This patch makes the following search-and-replace changes: gl_vert_result -> gl_varying_slot VERT_RESULT_* -> VARYING_SLOT_* Reviewed-by: Kenneth Graunke <[email protected]> Reviewed-by: Eric Anholt <[email protected]> Tested-by: Brian Paul <[email protected]>
* glsl: add support for ARB_texture_multisampleChris Forbes2013-03-021-0/+4
| | | | | | | | | | | | | | | | | | V2: - emit `sample` parameter properly for multisample texelFetch() - fix spurious whitespace change - introduce a new opcode ir_txf_ms rather than overloading the existing ir_txf further. This makes doing the right thing in the driver somewhat simpler. V3: - fix weird whitespace V4: - don't forget to include the new opcode in tex_opcode_strs[] (thanks Kenneth for spotting this) Signed-off-by: Chris Forbes <[email protected]> [V2] Reviewed-by: Eric Anholt <[email protected]> [V2] Reviewed-by: Paul Berry <[email protected]> Reviewed-by: Ian Romanick <[email protected]>
* glsl: Convert mix() to use a new ir_triop_lrp opcode.Kenneth Graunke2013-02-281-0/+7
| | | | | | | | | | | | | | | | | | | | | | | | Many GPUs have an instruction to do linear interpolation which is more efficient than simply performing the algebra necessary (two multiplies, an add, and a subtract). Pattern matching or peepholing this is more desirable, but can be tricky. By using an opcode, we can at least make shaders which use the mix() built-in get the more efficient behavior. Currently, all consumers lower ir_triop_lrp. Subsequent patches will actually generate different code. v2 [mattst88]: - Add LRP_TO_ARITH flag to ir_to_mesa.cpp. Will be removed in a subsequent patch and ir_triop_lrp translated directly. v3 [mattst88]: - Move changes from the next patch to opt_algebraic.cpp to accept 3-src operations. Reviewed-by: Matt Turner <[email protected]> Reviewed-by: Eric Anholt <[email protected]> Signed-off-by: Kenneth Graunke <[email protected]>
* glsl: Consolidate ir_expression constructors that use explicit types.Kenneth Graunke2013-02-281-9/+4
| | | | | | | | | | | | | | | | | | | Previously, we had separate constructors for one, two, and four operand expressions. This patch consolidates them into a single constructor which uses NULL default parameters. The unary and binary operator constructors had assertions to verify that the caller supplied the correct number of operands for the expression, but the four-operand version did not. Since get_num_operands for ir_quadop_vector returns the number of vector_elements, we can safely add that without breaking the semantics of ir_quadop_vector. This also paves the way for expressions with three operands. Currently, none can be constructed since get_num_operands() never returns 3. Reviewed-by: Matt Turner <[email protected]> Reviewed-by: Eric Anholt <[email protected]> Signed-off-by: Kenneth Graunke <[email protected]>
* glsl: Initialize ir_texture member variable.Vinson Lee2013-02-131-2/+2
| | | | | | | Fixes uninitialized pointer field defect reported by Coverity. Signed-off-by: Vinson Lee <[email protected]> Reviewed-by: Kenneth Graunke <[email protected]>
* glsl: Extend ir_expression_operation for ARB_shading_language_packingMatt Turner2013-01-251-0/+4
| | | | | | | | | For each function {pack,unpack}{Snorm,Unorm}4x8, add a corresponding opcode to enum ir_expression_operation. Validate the new opcodes in ir_validate.cpp. Reviewed-by: Chad Versace <[email protected]> Reviewed-by: Paul Berry <[email protected]>
* glsl: Remove ir_variable::uniform_blockIan Romanick2013-01-251-10/+0
| | | | | | | | | v2: A previous patch contained a spurious hunk that removed an assignment to ir_variable::uniform_block. That hunk was moved to this patch. Suggested by Carl Worth. Signed-off-by: Ian Romanick <[email protected]> Reviewed-by: Kenneth Graunke <[email protected]>
* glsl: Add a predicate to determine whether a variable is an interface blockIan Romanick2013-01-251-0/+27
| | | | | | | | | | | | | | | | | | | | | | | | | For the first declaration below, there will be an ir_variable named "instance" whose type and whose instance_type will be the same glsl_type. For the second declaration, there will be an ir_variable named "f" whose type is float and whose instance_type is B2. "instance" is an interface instance variable, but "f" is not. uniform B1 { float f; } instance; uniform B2 { float f; }; v2: Copy the comment message documentation into the code. Suggested by Paul Berry. Signed-off-by: Ian Romanick <[email protected]> Reviewed-by: Carl Worth <[email protected]> Reviewed-by: Paul Berry <[email protected]> Reviewed-by: Kenneth Graunke <[email protected]>
* glsl: Add ir_variable::interface_type fieldIan Romanick2013-01-251-1/+9
| | | | | | | | | | | | | | | For variables that are in an interface block or are an instance of an interface block, this is the GLSL_TYPE_INTERFACE type for that block. Convert the ir_variable::is_in_uniform_block method added in the previous commit to use this field instead of ir_variable::uniform_block. v2: Fix the place-holder comment on ir_variable::interface_type. Suggested by Paul Berry. Signed-off-by: Ian Romanick <[email protected]> Reviewed-by: Carl Worth <[email protected]> Reviewed-by: Kenneth Graunke <[email protected]>
* glsl: Add ir_variable::is_in_uniform_block predicateIan Romanick2013-01-251-0/+8
| | | | | | | | | The way a variable is tested for this property is about to change, and this makes the code easier to modify. Signed-off-by: Ian Romanick <[email protected]> Reviewed-by: Carl Worth <[email protected]> Reviewed-by: Kenneth Graunke <[email protected]>
* glsl: Extend ir_expression_operation for GLSL 3.00 pack/unpack functions (v2)Chad Versace2013-01-241-0/+31
| | | | | | | | | | | | | | | | | For each function {pack,unpack}{Snorm,Unorm,Half}2x16, add a corresponding opcode to enum ir_expression_operation. Validate the new opcodes in ir_validate.cpp. Also, add opcodes for scalarized variants of the Half2x16 functions. (The code generator for the i965 fragment shader requires that all vector operations be scalarized. A lowering pass, to be added later, will scalarize the Half2x16 functions). v2: Fix assertion message in ir_to_mesa [for idr]. Reviewed-by: Ian Romanick <[email protected]> Reviewed-by: Matt Tuner <[email protected]> Signed-off-by: Chad Versace <[email protected]>
* glsl: Fix typo in commentChad Versace2013-01-241-1/+1
| | | | | | | | | s/num_operands()/get_num_operands()/ Discovered because Eclipse failed to resolve the false reference. Reviewed-by: Ian Romanick <[email protected]> Signed-off-by: Chad Versace <[email protected]>
* glsl: Eliminate ambiguity between function ins/outs and shader ins/outsPaul Berry2013-01-241-4/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch replaces the three ir_variable_mode enums: - ir_var_in - ir_var_out - ir_var_inout with the following five: - ir_var_shader_in - ir_var_shader_out - ir_var_function_in - ir_var_function_out - ir_var_function_inout This eliminates a frustrating ambiguity: it used to be impossible to tell whether an ir_var_{in,out} variable was a shader in/out or a function in/out without seeing where the variable was declared in the IR. This complicated some optimization and lowering passes, and would have become a problem for implementing varying structs. In the lisp-style serialization of GLSL IR to strings performed by ir_print_visitor.cpp and ir_reader.cpp, I've retained the names "in", "out", and "inout" for function parameters, to avoid introducing code churn to the src/glsl/builtins/ir/ directory. Note: a couple of comments in the code seemed to indicate that we were planning for a possible future in which geometry shaders could have shader-scope inout variables. Our GLSL grammar rejects shader-scope inout variables, and I've been unable to find any evidence in the GLSL standards documents (or extensions) that this will ever be allowed, so I've eliminated these comments. Reviewed-by: Carl Worth <[email protected]> Reviewed-by: Jordan Justen <[email protected]> Reviewed-by: Eric Anholt <[email protected]>
* glsl: Create a field to store fractional varying locations.Paul Berry2012-12-141-0/+9
| | | | | | | | | | | | | | | Currently, the location of each varying is recorded in ir_variable as a multiple of the size of a vec4. In order to pack varyings, we need to be able to record, e.g. that a vec2 is stored in the second half of a varying slot rather than the first half. This patch introduces a field ir_variable::location_frac, which represents the offset within a vec4 where a varying's value is stored. Varyings that are not subject to packing will always have a location_frac value of zero. Reviewed-by: Eric Anholt <[email protected]> Reviewed-by: Ian Romanick <[email protected]>
* glsl/linker: Make separate ir_variable field to mean "unmatched".Paul Berry2012-12-141-0/+9
| | | | | | | | | | | | | | | | | Previously, the linker used a value of -1 in ir_variable::location to denote a generic input or output of the shader that had not yet been matched up to a variable in another pipeline stage. This patch introduces a new ir_variable field, is_unmatched_generic_inout, for that purpose. In future patches, this will allow us to separate the process of matching varyings between shader stages from the processes of assigning locations to those varying. That will in turn pave the way for packing varyings. Reviewed-by: Eric Anholt <[email protected]> Reviewed-by: Ian Romanick <[email protected]>
* glsl: Add a "ubo_load" expression type for fetches from UBOs.Eric Anholt2012-08-071-1/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Drivers will probably want to be able to take UBO references in a shader like: uniform ubo1 { float a; float b; float c; float d; } void main() { gl_FragColor = vec4(a, b, c, d); } and generate a single aligned vec4 load out of the UBO. For intel, this involves recognizing the shared offset of the aligned loads and CSEing them out. Obviously that involves breaking things down to loads from an offset from a particular UBO first. Thus, the driver doesn't want to see variable_ref(ir_variable("a")), and even more so does it not want to see array_ref(record_ref(variable_ref(ir_variable("a")), "field1"), variable_ref(ir_variable("i"))). where a.field1[i] is a row_major matrix. Instead, we're going to make a lowering pass to break UBO references down to expressions that are obvious to codegen, and amenable to merging through CSE. v2: Fix some partial thoughts in the ir_binop comment (review by Kenneth) Reviewed-by: Ian Romanick <[email protected]> Reviewed-by: Kenneth Graunke <[email protected]>
* glsl: Fix ir_last_opcode value.Ian Romanick2012-07-301-1/+1
| | | | | | | | | | Now that ir_quadop_vector exists, ir_last_binop and ir_last_opcode are no longer the same. Only one place currently uses this enumeration, and already handles ir_quadop_vector correctly. Signed-off-by: Ian Romanick <[email protected]> Signed-off-by: Kenneth Graunke <[email protected]> Reviewed-by: Olivier Galibert <[email protected]>
* glsl: Translate the AST for uniform blocks into some IR structures.Eric Anholt2012-07-201-1/+12
| | | | | | | | | | We're going to need this structure to cross-validate the uniform blocks between shader stages, since unused ir_variables might get dropped. It's also the place we store the RowMajor qualifier, which is not part of the GLSL type (since that would cause a bunch of type equality checks to fail). Reviewed-by: Ian Romanick <[email protected]>
* glsl: Initialize coordinate to NULL in ir_texture constructor.Kenneth Graunke2012-07-121-1/+2
| | | | | | | | | | | I ran into this while trying to create a TXS query, which doesn't have a coordinate. Since it didn't get initialized to NULL, a bunch of visitors tried to access it and crashed. Most of the time, this won't be a problem, but it's just a good idea. Signed-off-by: Kenneth Graunke <[email protected]> Reviewed-by: Eric Anholt <[email protected]>
* glsl: Remove unused ir_loop_jump::loop pointer.Kenneth Graunke2012-07-021-4/+0
| | | | | | | | | | | | | | | | | Commit 0c005bd7 intended to make ir_loop_jump::mode public, but also accidentally added a new pointer to the enclosing loop. Furthermore, it tried to initialize the new field by adding "this->loop = loop;" to the constructor, but since there is no loop parameter, this only initialized the field to itself---so it will likely be a garbage pointer. A lot of code, such as lower_jumps, allocates new loop jumps without setting this field appropriately, so any uses would probably just crash. Thankfully, there were none, so we can just delete the field. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=51574 Reviewed-by: Ian Romanick <[email protected]> Reviewed-by: Eric Anholt <[email protected]>
* glsl: fix comment typoBrian Paul2012-06-261-1/+1
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* glsl: Add unary operation ir_unop_f2u.Paul Berry2012-06-151-0/+1
| | | | | | | | | | | | | | | Previously, we performed conversions from float->uint by a two step process: float->int->uint. However, on platforms that use saturating conversions (e.g. i965), this didn't work, because if the source value was larger than the maximum representable int (0x7fffffff), then converting it to an int would clamp it to 0x7fffffff. This patch just adds the new opcode; further patches will adapt optimization passes and back-ends to use it, and then finally the ast_to_hir logic will be modified to emit the new opcode. Reviewed-by: Brian Paul <[email protected]> Reviewed-by: Kenneth Graunke <[email protected]>
* glsl: Add is_basis functionMatt Turner2012-06-121-4/+22
| | | | | | | Determines whether it's a basis vector, i.e., a vector with one element equal to 1 and all other elements equal to 0. Reviewed-by: Kenneth Graunke <[email protected]>
* glsl: Clean up warnings about deleting classes without virtual destructors.Eric Anholt2012-06-081-0/+10
| | | | Reviewed-by: Kenneth Graunke <[email protected]>
* glsl: New unary opcodes for ARB_shader_bit_encoding support.Olivier Galibert2012-06-071-11/+15
| | | | | | | The opcodes are bitcast_f2u, bitcast_f2i, bitcast_i2f and bitcast_u2f. Signed-off-by: Olivier Galibert <[email protected]> Reviewed-by: Kenneth Graunke <[email protected]>
* glsl: Change built-in constant expression evaluation to run the IR.Olivier Galibert2012-05-081-0/+15
| | | | | | | | This removes code duplication with ir_expression::constant_expression_value and builtins/ir/*. Signed-off-by: Olivier Galibert <[email protected]> Reviewed-by: Kenneth Graunke <[email protected]>
* glsl: Add an origin pointer in the function signature object.Olivier Galibert2012-05-081-0/+3
| | | | | | | | This points to the object with the function body, allowing us to map from a built-in prototype to the actual body with IR code to execute. Signed-off-by: Olivier Galibert <[email protected]> Reviewed-by: Kenneth Graunke <[email protected]>
* glsl: Add methods to copy parts of one ir_constant into another.Olivier Galibert2012-05-081-0/+25
| | | | | | | | | | | | | | | - copy_masked_offset copies part of a constant into another, assign-like. - copy_offset copies a constant into (a subset of) another, funcall-return like. These methods are to be used to trace through assignments and function calls when computing a constant expression. Signed-off-by: Olivier Galibert <[email protected]> Reviewed-by: Kenneth Graunke <[email protected]> Reviewed-by: Eric Anholt <[email protected]> [v1]
* glsl: Add a constant_referenced method to ir_dereference*Olivier Galibert2012-05-081-0/+36
| | | | | | | | | | The method is used to get a reference to an ir_constant * within the context of evaluating an assignment when calculating a constant_expression_value. Signed-off-by: Olivier Galibert <[email protected]> Reviewed-by: Kenneth Graunke <[email protected]> Reviewed-by: Eric Anholt <[email protected]> [v1]
* glsl: Add a variable context to constant_expression_value().Olivier Galibert2012-05-081-13/+18
| | | | | | Signed-off-by: Olivier Galibert <[email protected]> Reviewed-by: Kenneth Graunke <[email protected]> Reviewed-by: Eric Anholt <[email protected]> [v1]
* glsl: Track in each ir_variable whether it was ever assigned.Eric Anholt2012-04-191-0/+13
| | | | | | | This will be used for some compile-and-link-time error checking, where currently we've been doing error checking only at link time. Reviewed-by: Kenneth Graunke <[email protected]>
* glsl: add support for ARB_blend_func_extended (v3)Dave Airlie2012-04-131-0/+1
| | | | | | | | | | | | | | | | | | | This adds index support to the GLSL compiler. I'm not 100% sure of my approach here, esp without how output ordering happens wrt location, index pairs, in the "mark" function. Since current hw doesn't ever have a location > 0 with an index > 0, we don't have to work out if the output ordering the hw requires is location, index, location, index or location, location, index, index. But we have no hw to know, so punt on it for now. v2: index requires layout - catch and error setup explicit index properly. v3: drop idx_offset stuff, assume index follow location Signed-off-by: Dave Airlie <[email protected]>
* mesa: add support for ARB_blend_func_extended (v4)Dave Airlie2012-04-131-0/+5
| | | | | | | | | | | | | | | | | | | | Add implementations of the two API functions, Add a new strings to uint mapping for index bindings Add the blending mode validation for SRC1 + SRC_ALPHA_SATURATE Add get for MAX_DUAL_SOURCE_DRAW_BUFFERS v2: Add check in valid_to_render to address case in spec ERRORS. v3: Add index to ir.h so this patch compiles on its own fixup comment v4: fixup Brian's comments The GLSL patch will setup the indices. Signed-off-by: Dave Airlie <[email protected]>
* glsl: Demote 'type' from ir_instruction to ir_rvalue and ir_variable.Kenneth Graunke2012-04-021-2/+7
| | | | | | | | | | | | | Variables have types, expression trees have types, but statements don't. Rather than have a nonsensical field that stays NULL in the base class, just move it to where it makes sense. Fix up a few places that lazily used ir_instruction even though they actually knew the particular subclass. Signed-off-by: Kenneth Graunke <[email protected]> Reviewed-by: Eric Anholt <[email protected]> Reviewed-by: Ian Romanick <[email protected]>
* glsl: Remove ir_call::get_callee() and set_callee().Kenneth Graunke2012-04-021-16/+5
| | | | | | | | | | | | | Previously, set_callee() performed some assertions about the type of the ir_call; protecting the bare pointer ensured these checks would be run. However, ir_call no longer has a type, so the getter and setter methods don't actually do anything useful. Remove them in favor of accessing callee directly, as is done with most other fields in our IR. Signed-off-by: Kenneth Graunke <[email protected]> Reviewed-by: Eric Anholt <[email protected]> Reviewed-by: Ian Romanick <[email protected]>
* glsl: Convert ir_call to be a statement rather than a value.Kenneth Graunke2012-04-021-7/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Aside from ir_call, our IR is cleanly split into two classes: - Statements (typeless; used for side effects, control flow) - Values (deeply nestable, pure, typed expression trees) Unfortunately, ir_call confused all this: - For void functions, we placed ir_call directly in the instruction stream, treating it as an untyped statement. Yet, it was a subclass of ir_rvalue, and no other ir_rvalue could be used in this way. - For functions with a return value, ir_call could be placed in arbitrary expression trees. While this fit naturally with the source language, it meant that expressions might not be pure, making it difficult to transform and optimize them. To combat this, we always emitted ir_call directly in the RHS of an ir_assignment, only using a temporary variable in expression trees. Many passes relied on this assumption; the acos and atan built-ins violated it. This patch makes ir_call a statement (ir_instruction) rather than a value (ir_rvalue). Non-void calls now take a ir_dereference of a variable, and store the return value there---effectively a call and assignment rolled into one. They cannot be embedded in expressions. All expression trees are now pure, without exception. Signed-off-by: Kenneth Graunke <[email protected]> Reviewed-by: Eric Anholt <[email protected]> Reviewed-by: Ian Romanick <[email protected]>
* glsl: Move constant expression handling from calls to signatures.Kenneth Graunke2012-04-021-0/+6
| | | | | | | | | | | | | | | When translating a call from AST to HIR, we need to decide whether it can be evaluated to a constant before emitting any code (namely, the temporary declaration, assignment, and call.) Soon, ir_call will become a statement taking a dereference of where to store the return value, rather than an rvalue to be used on the RHS of an assignment. It will be more convenient to try evaluation before creating a call. ir_function_signature seems like a reasonable place. Signed-off-by: Kenneth Graunke <[email protected]> Reviewed-by: Eric Anholt <[email protected]> Reviewed-by: Ian Romanick <[email protected]>
* glsl: Use ir_rvalue to represent generic error_type values.Kenneth Graunke2012-04-021-15/+20
| | | | | | | | | | | | | | | | | | | | | | Currently, ir_call can be used as either a statement (for void functions) or a value (for non-void functions). This is rather awkward, as it's the only class that can be used in both forms. A number of places use ir_call::get_error_instruction() to construct a generic value of error_type. If ir_call is to become a statement, it can no longer serve this purpose. Unfortunately, none of our classes are particularly well suited for this, and creating a new one would be rather aggrandizing. So, this patch introduces ir_rvalue::error_value(), a static method that creates an instance of the base class, ir_rvalue. This has the nice property that you can't accidentally try and access uninitialized fields (as it doesn't have any). The downside is that the base class is no longer abstract. Signed-off-by: Kenneth Graunke <[email protected]> Reviewed-by: Eric Anholt <[email protected]> Reviewed-by: Ian Romanick <[email protected]>
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