diff options
author | Ian Romanick <ian.d.romanick@intel.com> | 2010-08-02 18:48:25 -0700 |
---|---|---|
committer | Ian Romanick <ian.d.romanick@intel.com> | 2010-08-04 16:47:27 -0700 |
commit | 5a7758efbe14dee026245a4f4f4fb3ccf7b2c23b (patch) | |
tree | be214c6f3ea4be5ec4472afa5b3426d5191380f5 /src/glsl/ir_clone.cpp | |
parent | 8e9ce2eb56a087c2544112700ae1abe3f96648dd (diff) |
glsl2: Add ir_assignment::write_mask and associated methods
Replace swizzles on the LHS with additional swizzles on the RHS and a
write mask in the assignment instruction. As part of this add
ir_assignment::set_lhs. Ideally we'd make ir_assignment::lhs private
to prevent erroneous writes, but that would require a lot of code
butchery at this point.
Add ir_assignment constructor that takes an explicit write mask. This
is required for ir_assignment::clone, but it can also be used in other
places. Without this, ir_assignment clones lose their write masks,
and incorrect IR is generated in optimization passes.
Add ir_assignment::whole_variable_written method. This method gets
the variable on the LHS if the whole variable is written or NULL
otherwise. This is different from
ir->lhs->whole_variable_referenced() because the latter has no
knowledge of the write mask stored in the ir_assignment.
Gut all code from ir_to_mesa that handled swizzles on the LHS of
assignments. There is probably some other refactoring that could be
done here, but that can be left for another day.
Diffstat (limited to 'src/glsl/ir_clone.cpp')
-rw-r--r-- | src/glsl/ir_clone.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/glsl/ir_clone.cpp b/src/glsl/ir_clone.cpp index 59831834bd7..0e202164b32 100644 --- a/src/glsl/ir_clone.cpp +++ b/src/glsl/ir_clone.cpp @@ -242,7 +242,8 @@ ir_assignment::clone(void *mem_ctx, struct hash_table *ht) const return new(mem_ctx) ir_assignment(this->lhs->clone(mem_ctx, ht), this->rhs->clone(mem_ctx, ht), - new_condition); + new_condition, + this->write_mask); } ir_function * |