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* nir/gcm: Fix a typo in a commentJason Ekstrand2017-01-121-1/+1
| | | | Reported-by: Matt Turner <[email protected]>
* nir/gcm: Rework the schedule late loopJason Ekstrand2017-01-121-5/+6
| | | | | | | | | | | | This fixes a bug in code motion that occurred when the best block is the same as the schedule early block. In this case, because we're checking (lca != def->parent_instr->block) at the top of the loop, we never get to the check for loop depth so we wouldn't move it out of the loop. This commit reworks the loop to be a simple for loop up the dominator chain and we place the (lca != def->parent_instr->block) check at the end of the loop. Reviewed-by: Matt Turner <[email protected]>
* spirv: Handle patch decorations up-frontJason Ekstrand2017-01-121-0/+23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Once again, SPIR-V is insane... It allows you to place "patch" decorations on structure members. Presumably, this is so that you can do something such as out struct S { layout(location = 0) patch vec4 thing1; layout(location = 0) vec4 thing2; } str; And have your I/O "nicely" organized. While this is a bit silly, it's allowed and well-defined so whatever. Where it really gets interesting is when you have an array of struct. SPIR-V says nothing about not allowing you to have those qualifiers on the members of a struct that's inside an array and GLSLang does this. Specifically, if you have layout(location = 0) out patch struct S { vec4 thing1; vec4 thing2; } str[2]; then GLSLang will place the "patch" decorations on the struct members. This is ridiculous there is no way that having some of them be patch and some not would be well-defined given that patch and non-patch outputs are in effectively different storage classes. This commit moves around the way we handle the "patch" decoration so that we can detect even the crazy cases and handle them. Fixes: dEQP-VK.tessellation.user_defined_io.per_patch_block_array.* Reviewed-by: Kenneth Graunke <[email protected]>
* spirv: fix typo in warning messageIago Toral Quiroga2017-01-121-1/+1
| | | | Reviewed-by: Samuel Iglesias Gonsálvez <[email protected]>
* spirv: Shut up unhandled enumeration value warnings.Kenneth Graunke2017-01-111-0/+2
| | | | | | We don't want to do anything for the other cases. Signed-off-by: Kenneth Graunke <[email protected]>
* nir: don't turn ieq/ine into inot if used by an ifTimothy Arceri2017-01-122-2/+8
| | | | | | | | | | | | | | | | | | | Otherwise we will end up with an extra instruction to compare the result of the inot. On BDW: total instructions in shared programs: 13060620 -> 13060481 (-0.00%) instructions in affected programs: 103379 -> 103240 (-0.13%) helped: 127 HURT: 0 total cycles in shared programs: 256590950 -> 256587408 (-0.00%) cycles in affected programs: 11324730 -> 11321188 (-0.03%) helped: 114 HURT: 21 Reviewed-by: Jason Ekstrand <[email protected]>
* nir: add late opt to turn inot/b2f combos back to bcselTimothy Arceri2017-01-122-0/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | We turn these from bcsel into inot/b2f combos in order for other optimisation passes to get further. Once we have finished turn the ones that remain and are used in more than a single expression back into a bcsel. On BDW: total instructions in shared programs: 13060965 -> 13060297 (-0.01%) instructions in affected programs: 835701 -> 835033 (-0.08%) helped: 670 HURT: 2 total cycles in shared programs: 256599536 -> 256598006 (-0.00%) cycles in affected programs: 114655488 -> 114653958 (-0.00%) helped: 419 HURT: 240 LOST: 0 GAINED: 1 The 2 HURT is because inserting bcsel creates the only use of const 1.0 in two shaders from tri-of-friendship-and-madness. Reviewed-by: Jason Ekstrand <[email protected]>
* nir: add imprecise flrp optimisationTimothy Arceri2017-01-121-0/+1
| | | | | | | | | | | | | | | | | | On BDW: total instructions in shared programs: 13061890 -> 13061877 (-0.00%) instructions in affected programs: 2441 -> 2428 (-0.53%) helped: 13 HURT: 0 total cycles in shared programs: 256612254 -> 256611784 (-0.00%) cycles in affected programs: 16418 -> 15948 (-2.86%) helped: 10 HURT: 2 V2: don't use ffma directly Reviewed-by: Jason Ekstrand <[email protected]>
* nir: Introduce a nir_opt_move_comparisons() pass.Kenneth Graunke2017-01-123-0/+188
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | This tries to move comparisons (a common source of boolean values) closer to their first use. For GPUs which use condition codes, this can eliminate a lot of temporary booleans and comparisons which reload the condition code register based on a boolean. V2: (Timothy Arceri) - fix move comparision for phis so we dont end up with: vec1 32 ssa_227 = phi block_34: ssa_1, block_38: ssa_240 vec1 32 ssa_235 = feq ssa_227, ssa_1 vec1 32 ssa_230 = phi block_34: ssa_221, block_38: ssa_235 - add nir_op_i2b/nir_op_f2b to the list of comparisons. V3: (Timothy Arceri) - tidy up suggested by Jason. - add inot/fnot to move comparison list V4: (Jason Ekstrand) - clean up move_comparison_source - get rid of the tuple - rework phi handling Signed-off-by: Kenneth Graunke <[email protected]> Reviewed-by: Ian Romanick <[email protected]> [v1] Reviewed-by: Jason Ekstrand <[email protected]>
* nir/algebraic: add support for conditional helper functions to expressionsTimothy Arceri2017-01-123-1/+15
| | | | Reviewed-by: Jason Ekstrand <[email protected]>
* nir/search: Only allow matching SSA valuesJason Ekstrand2017-01-111-5/+11
| | | | | | | | This is more correct and should also be a tiny bit faster since we're just comparing pointers instead of calling nir_src_equal. Reviewed-by: Timothy Arceri <[email protected]> Cc: "13.0" <[email protected]>
* nir: change asserts to unreachable in nir_type_conversion_opTapani Pälli2017-01-111-3/+3
| | | | | | | | | this is to avoid following compilation error on Android: error: control may reach end of non-void function [-Werror,-Wreturn-type] Signed-off-by: Tapani Pälli <[email protected]> Reviewed-by: Samuel Iglesias Gonsálvez <[email protected]>
* spirv: gl_PrimitiveID in the fragment shader is handled as an inputIago Toral Quiroga2017-01-111-1/+4
| | | | | | | | | Geometry and Tessellation stages do handle this as a system value instead. Fixes: dEQP-VK.geometry.basic.primitive_id Reviewed-by: Dave Airlie <[email protected]>
* nir: Add a pass to lower TES patch_vertices intrinsics to a constant.Kenneth Graunke2017-01-103-0/+55
| | | | | | | | | | | | | | In Vulkan, we always have both the TCS and TES available in the same pipeline, so we can simply use the TCS OutputVertices execution mode value as the TES PatchVertices built-in. For GLSL, we handle this in the linker. But we could use this pass in the case when both TCS and TES are linked together, if we wanted. Signed-off-by: Kenneth Graunke <[email protected]> Reviewed-by: Dave Airlie <[email protected]> Reviewed-by: Iago Toral Quiroga <[email protected]> Reviewed-by: Jason Ekstrand <[email protected]>
* spirv: Silence unsupported tessellation capability warnings.Kenneth Graunke2017-01-102-2/+6
| | | | | | | | ...when the capability bit is set. Signed-off-by: Kenneth Graunke <[email protected]> Reviewed-by: Iago Toral Quiroga <[email protected]> [v1] Reviewed-by: Jason Ekstrand <[email protected]>
* spirv: Tidy some repeated if checks by using a switch statement.Kenneth Graunke2017-01-101-8/+9
| | | | | | | Iago suggested tidying this. Signed-off-by: Kenneth Graunke <[email protected]> Reviewed-by: Jason Ekstrand <[email protected]>
* spirv: Add tessellation varying and built-in support.Kenneth Graunke2017-01-103-6/+52
| | | | | | | | | | | | We need to: - handle the extra array level for per-vertex varyings - handle the patch qualifier correctly - assign varying locations Signed-off-by: Kenneth Graunke <[email protected]> Reviewed-by: Dave Airlie <[email protected]> Reviewed-by: Iago Toral Quiroga <[email protected]> Reviewed-by: Jason Ekstrand <[email protected]>
* spirv: Handle tessellation execution modes.Kenneth Graunke2017-01-101-6/+41
| | | | | | | | | | v2: Use info->tess. v3: Handle more things in either TCS/TES. Signed-off-by: Kenneth Graunke <[email protected]> Reviewed-by: Dave Airlie <[email protected]> [v1] Reviewed-by: Iago Toral Quiroga <[email protected]> [v1] Reviewed-by: Jason Ekstrand <[email protected]>
* compiler: Merge shader_info's tcs and tes structs.Kenneth Graunke2017-01-101-4/+3
| | | | | | | | | | | | | | | Annoyingly, SPIR-V lets you specify all of these fields in either the TCS or TES, which means that we need to be able to store all of them for either shader stage. Putting them in a union won't work. Combining both is an easy solution, and given that the TCS struct only had a single field, it's pretty inexpensive. This patch renames the combined struct to "tess" to indicate that it's for tessellation in general, not one of the two stages. Signed-off-by: Kenneth Graunke <[email protected]> Reviewed-by: Jason Ekstrand <[email protected]>
* nir: Fix anonymous union initialization with older GCC.Vinson Lee2017-01-091-1/+1
| | | | | | | | | | | | | | | Fix this build error with GCC 4.4.7. CC nir/nir_opt_copy_prop_vars.lo nir/nir_opt_copy_prop_vars.c: In function ‘copy_prop_vars_block’: nir/nir_opt_copy_prop_vars.c:765: error: unknown field ‘deref’ specified in initializer nir/nir_opt_copy_prop_vars.c:765: warning: missing braces around initializer nir/nir_opt_copy_prop_vars.c:765: warning: (near initialization for ‘(anonymous).<anonymous>’) nir/nir_opt_copy_prop_vars.c:765: warning: initialization from incompatible pointer type Fixes: 62332d139c8f ("nir: Add a local variable-based copy propagation pass") Signed-off-by: Vinson Lee <[email protected]> Acked-by: Jason Ekstrand <[email protected]>
* glsl: Do not allow scalar types in vector relational functionsBoyan Ding2017-01-091-19/+10
| | | | | | | | | | According to OpenGL Shading Language 4.50 spec, Section 8.7 "Vector Relational Functions", functions of this type do not operate on scalar types, so remove scalar types from signature definitions to make the behavior consistent with glslangValidator and other drivers. Reviewed-by: Matt Turner <[email protected]> Signed-off-by: Boyan Ding <[email protected]>
* nir: remove duplicated foreach loopThomas Hindoe Paaboel Andersen2017-01-091-1/+0
| | | | | | | | The foreach loop was called both in the else case and right after. The indentation seems to indicate that the extra call was from a previous version with an else section with out curly brackets. Reviewed-by: Jason Ekstrand <[email protected]>
* spirv: Move cursor before calling vtn_ssa_value() in phi 2nd pass.Kenneth Graunke2017-01-091-1/+2
| | | | | | | | | | | | | | vtn_ssa_value() can produce variable loads, and the cursor might be after a return statement, causing nir_builder assert failures about not inserting instructions after a jump. This fixes: dEQP-VK.spirv_assembly.instruction.graphics.barrier.in_if dEQP-VK.spirv_assembly.instruction.graphics.barrier.in_switch Cc: "13.0 12.0" <[email protected]> Signed-off-by: Kenneth Graunke <[email protected]> Reviewed-by: Jason Ekstrand <[email protected]>
* spirv: enable SpvCapabilityFloat64 only to supported platformsSamuel Iglesias Gonsálvez2017-01-092-1/+5
| | | | | | | | v2 (Jason): - Use nir_spirv_supported_extensions to check if the feature is enabled. Signed-off-by: Samuel Iglesias Gonsálvez <[email protected]> Reviewed-by: Jason Ekstrand <[email protected]>
* nir/i965: use two slots from inputs_read for dvec3/dvec4 vertex input attributesJuan A. Suarez Romero2017-01-092-25/+51
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | So far, input_reads was a bitmap tracking which vertex input locations were being used. In OpenGL, an attribute bigger than a vec4 (like a dvec3 or dvec4) consumes just one location, any other small attribute. So we mark the proper bit in inputs_read, and also the same bit in double_inputs_read if the attribute is a dvec3/dvec4. But in Vulkan, this is slightly different: a dvec3/dvec4 attribute consumes two locations, not just one. And hence two bits would be marked in inputs_read for the same vertex input attribute. To avoid handling two different situations in NIR, we just choose the latest one: in OpenGL, when creating NIR from GLSL/IR, any dvec3/dvec4 vertex input attribute is marked with two bits in the inputs_read bitmap (and also in the double_inputs_read), and following attributes are adjusted accordingly. As example, if in our GLSL/IR shader we have three attributes: layout(location = 0) vec3 attr0; layout(location = 1) dvec4 attr1; layout(location = 2) dvec3 attr2; then in our NIR shader we put attr0 in location 0, attr1 in locations 1 and 2, and attr2 in location 3 and 4. Checking carefully, basically we are using slots rather than locations in NIR. When emitting the vertices, we do a inverse map to know the corresponding location for each slot. v2 (Jason): - use two slots from inputs_read for dvec3/dvec4 NIR from GLSL/IR. v3 (Jason): - Fix commit log error. - Use ladder ifs and fix braces. - elements_double is divisible by 2, don't need DIV_ROUND_UP(). - Use if ladder instead of a switch. - Add comment about hardware restriction in 64bit vertex attributes. Reviewed-by: Jason Ekstrand <[email protected]>
* spirv: add support for doubles to OpSpecConstantSamuel Iglesias Gonsálvez2017-01-093-6/+47
| | | | | | | | | v2 (Jason): - Fix indent in radv change - Add vtn_u64_literal() helper to take 64 bits (Jason) Signed-off-by: Samuel Iglesias Gonsálvez <[email protected]> Reviewed-by: Jason Ekstrand <[email protected]>
* spirv/nir: add (un)packDouble2x32() translationSamuel Iglesias Gonsálvez2017-01-091-0/+2
| | | | | Signed-off-by: Samuel Iglesias Gonsálvez <[email protected]> Reviewed-by: Jason Ekstrand <[email protected]>
* spirv/nir: implement DF conversionsSamuel Iglesias Gonsálvez2017-01-093-13/+23
| | | | | | | | SPIR-V does not have special opcodes for DF conversions. We need to identify them by checking the bit size of the operand and the result. Signed-off-by: Samuel Iglesias Gonsálvez <[email protected]> Reviewed-by: Jason Ekstrand <[email protected]>
* nir: add nir_type_conversion_op()Samuel Iglesias Gonsálvez2017-01-092-0/+83
| | | | | | | | | | | | | | This function returns the nir_op corresponding to the conversion between the given nir_alu_type arguments. This function lacks support for integer-based types with bit_size != 32 and for float16 conversion ops. v2: - Improve readiness of the code and delete cases that don't happen now (Jason) Signed-off-by: Samuel Iglesias Gonsálvez <[email protected]> Reviewed-by: Jason Ekstrand <[email protected]>
* nir: add nir_get_nir_type_for_glsl_type()Samuel Iglesias Gonsálvez2017-01-091-0/+24
| | | | | | | | | | | v2 (Jason): - Refactor nir_get_nir_type_for_glsl_type() to avoid using unneeded helpers (Jason) v3: - Use return directly (Jason) Signed-off-by: Samuel Iglesias Gonsálvez <[email protected]> Reviewed-by: Jason Ekstrand <[email protected]>
* spirv: add support for doubles on OpComposite{Insert,Extract}Samuel Iglesias Gonsálvez2017-01-091-0/+1
| | | | | Signed-off-by: Samuel Iglesias Gonsálvez <[email protected]> Reviewed-by: Jason Ekstrand <[email protected]>
* spirv: Enable double floating points when copying variables in ↵Samuel Iglesias Gonsálvez2017-01-091-0/+1
| | | | | | | _vtn_variable_copy() Signed-off-by: Samuel Iglesias Gonsálvez <[email protected]> Reviewed-by: Jason Ekstrand <[email protected]>
* spirv: add double support to _vtn_block_load_store()Samuel Iglesias Gonsálvez2017-01-091-0/+1
| | | | | Signed-off-by: Samuel Iglesias Gonsálvez <[email protected]> Reviewed-by: Jason Ekstrand <[email protected]>
* spirv: add double support to _vtn_variable_load_storeSamuel Iglesias Gonsálvez2017-01-091-0/+1
| | | | | Signed-off-by: Samuel Iglesias Gonsálvez <[email protected]> Reviewed-by: Jason Ekstrand <[email protected]>
* spirv: add double support to SpvOpCompositeExtractSamuel Iglesias Gonsálvez2017-01-091-2/+14
| | | | | | | | v2 (Jason): - Add asserts. Signed-off-by: Samuel Iglesias Gonsálvez <[email protected]> Reviewed-by: Jason Ekstrand <[email protected]>
* spirv: fix SpvOpSpecConstantOp with SpvOpVectorShuffle working with ↵Samuel Iglesias Gonsálvez2017-01-091-12/+40
| | | | | | | | | | | | | | | | | double-based vecs We need to pick two 32-bit values per component to perform the right shuffle operation. v2 (Jason): - Add assert to check matching bit sizes (Jason) - Simplify the code to pick components (Jason) v3: - Switch on bit_size once (Jason) - Add comment to explain the constant value for unused components (Erik) Signed-off-by: Samuel Iglesias Gonsálvez <[email protected]> Reviewed-by: Jason Ekstrand <[email protected]>
* spirv: add DF support to SpvOp*ConstantCompositeSamuel Iglesias Gonsálvez2017-01-091-3/+11
| | | | | | | | v2 (Jason): - Add assert. Signed-off-by: Samuel Iglesias Gonsálvez <[email protected]> Reviewed-by: Jason Ekstrand <[email protected]>
* spirv: add DF support to vtn_const_ssa_value()Samuel Iglesias Gonsálvez2017-01-091-3/+5
| | | | | Signed-off-by: Samuel Iglesias Gonsálvez <[email protected]> Reviewed-by: Jason Ekstrand <[email protected]>
* spirv: add support for loading DF constantsSamuel Iglesias Gonsálvez2017-01-091-2/+10
| | | | | | | | v2 (Jason): - Add assert. Signed-off-by: Samuel Iglesias Gonsálvez <[email protected]> Reviewed-by: Jason Ekstrand <[email protected]>
* spirv: add definition of double based data typesSamuel Iglesias Gonsálvez2017-01-091-2/+4
| | | | | Signed-off-by: Samuel Iglesias Gonsálvez <[email protected]> Reviewed-by: Jason Ekstrand <[email protected]>
* spirv: fix typo in spec_constant_decoration_cb()Samuel Iglesias Gonsálvez2017-01-091-2/+2
| | | | | Signed-off-by: Samuel Iglesias Gonsálvez <[email protected]> Reviewed-by: Jason Ekstrand <[email protected]>
* st/mesa/glsl: set num_images directly in shader_infoTimothy Arceri2017-01-092-4/+5
| | | | | | This change also removes the now duplicate NumImages field. Reviewed-by: Nicolai Hähnle <[email protected]>
* nir: add another comparison simplificationTimothy Arceri2017-01-091-0/+2
| | | | | | | | | | | | | | | | On BDW: total instructions in shared programs: 13061877 -> 13060965 (-0.01%) instructions in affected programs: 133569 -> 132657 (-0.68%) helped: 566 HURT: 0 total cycles in shared programs: 256611784 -> 256599536 (-0.00%) cycles in affected programs: 861016 -> 848768 (-1.42%) helped: 379 HURT: 73 Reviewed-by: Jason Ekstrand <[email protected]>
* nir: Turn bcsel of +/- 1.0 and 0.0 into b2f sequences.Kenneth Graunke2017-01-091-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On BDW: total instructions in shared programs: 13074882 -> 13068703 (-0.05%) instructions in affected programs: 1823116 -> 1816937 (-0.34%) helped: 4187 HURT: 537 total cycles in shared programs: 256622718 -> 256425382 (-0.08%) cycles in affected programs: 123790120 -> 123592784 (-0.16%) helped: 3823 HURT: 2037 total spills in shared programs: 15276 -> 14929 (-2.27%) spills in affected programs: 9446 -> 9099 (-3.67%) helped: 352 HURT: 1 total fills in shared programs: 20496 -> 20144 (-1.72%) fills in affected programs: 13040 -> 12688 (-2.70%) helped: 352 HURT: 1 LOST: 2 GAINED: 21 v2: Rely on 'a' being a well-formed boolean (Connor, Eric). Signed-off-by: Kenneth Graunke <[email protected]> Reviewed-by: Timothy Arceri <[email protected]> Reviewed-by: Jason Ekstrand <[email protected]>
* nir: Convert ineg(b2i(a)) to a if it's a boolean.Kenneth Graunke2017-01-091-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | On BDW: total instructions in shared programs: 13071119 -> 13070371 (-0.01%) instructions in affected programs: 83424 -> 82676 (-0.90%) helped: 505 HURT: 45 (all TCS, all hurt by a single instruction) total cycles in shared programs: 256601322 -> 256588932 (-0.00%) cycles in affected programs: 819410 -> 807020 (-1.51%) helped: 450 HURT: 57 total loops in shared programs: 2950 -> 2942 (-0.27%) loops in affected programs: 8 -> 0 helped: 7 HURT: 0 v2: Drop unnecessary 'a@bool' annotation (Connor, Eric). Add a comment explaining the rule (Ian). Signed-off-by: Kenneth Graunke <[email protected]> Reviewed-by: Ian Romanick <[email protected]> [v1] Reviewed-by: Timothy Arceri <[email protected]> Reviewed-by: Jason Ekstrand <[email protected]> Reviewed-by: Matt Turner <[email protected]>
* mesa: Introduce a compiler enum for tessellation spacing.Kenneth Graunke2017-01-076-10/+18
| | | | | | | | | | It feels weird using GL_* enums in a Vulkan driver. v2: Fix the TESS_SPACING -> PIPE_TESS_SPACING conversion. Signed-off-by: Kenneth Graunke <[email protected]> Reviewed-by: Timothy Arceri <[email protected]> Reviewed-by: Jason Ekstrand <[email protected]>
* compiler: Change shader_info->tes.vertex_order into a ccw boolean.Kenneth Graunke2017-01-071-1/+2
| | | | | | | | | | The vertex order is either clockwise or counterclockwise. We can just store a "ccw" boolean rather than GLenum values. I don't want to use GLenums in a Vulkan driver, and even in GL a simple boolean works fine. Signed-off-by: Kenneth Graunke <[email protected]> Reviewed-by: Timothy Arceri <[email protected]> Reviewed-by: Jason Ekstrand <[email protected]>
* Revert recent GLSL slot counting fiasco.Kenneth Graunke2017-01-075-62/+14
| | | | | | | | | | | | | | | | | | | | | | | | I apparently broke mark_whole_variable in ir_set_program_inouts. It was passing a type that wasn't var->type, so the wrapper didn't work out. It's all broken, revert it and start over. Fixes all kinds of things on other drivers. Revert "glsl: Make is_fixed_function_array actually check for varyings." This reverts commit 42699e12711668a142b7acf11c168cf4301c1295. Revert "glsl: Mark whole variable used for ClipDistance and TessLevel*." This reverts commit 5c580e64cc206ab160e1767c42e4d6c81f67da4d. Revert "glsl: Override the # of varying slots for ClipDistance and TessLevel*." This reverts commit 8b5749f65ac434961308ccb579fb8a816e4f29d5. Revert "glsl: Create and use a new ir_variable::count_attribute_slots() wrapper." This reverts commit 6aa5cb34d03765b7be8611aa516bc201bd337f73.
* glsl: Make is_fixed_function_array actually check for varyings.Kenneth Graunke2017-01-071-0/+4
| | | | | | | | | | | We can't check VARYING_SLOT_* locations until we've determined that the variable is actually a varying. Fixes assert failures in drivers which actually use this path, such as radeonsi and i915. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=99314 Signed-off-by: Kenneth Graunke <[email protected]>
* glsl: fix opt_minmax redundancy checks against baserangeTimothy Arceri2017-01-071-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Marking operations as redundant if they are equal to the base range is fine when the tree structure is something like this: max / \ max b / \ 3 max / \ 3 a But the opt falls apart with a tree like this: max / \ max max / \ / \ 3 a b 3 The problem is that both branches are treated the same: descending in the left branch will prune the constant, and then descending the right branch will prune the constant there as well, because limits[0] wasn't updated to take the change on the left branch into account, and so we still get [3,\infty) as baserange. In order to fix the bug we just disable the marking of redundant expressions when they match the baserange. NIR algebraic opt will clean up the first tree for anyway, hopefully other backends are smart enough to do this also. Cc: "13.0" <[email protected]> Reviewed-by: Nicolai Hähnle <[email protected]>
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