Previously, the casting operations were macros.  While this is usually
fine, the casting macro used the input parameter twice leading to strange
behavior when you passed the result of another function into it.  Since we
know the source and destination types explicitly, we don't loose anything
by making it a function.

Also, this gives us a nice little macro for creating cast function that
will hopefully prevent mistyping.

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>

Reviewed-by: Chris Forbes <chrisf@ijw.co.nz>

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>

We used to have the number of components built into the intrinsic.  This
meant that all of our load/store intrinsics had vec1, vec2, vec3, and vec4
variants.  This lead to piles of switch statements to generate the correct
intrinsic names, and introspection to figure out the number of components.
We can make things much nicer by allowing "vectorized" intrinsics.

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>

This commit switches us over to the new variable lowering code which is
capable of properly handling lowering indirects as we go.

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>

With this commit, the GLSL IR -> NIR pass generates NIR in more-or-less SSA
form.  It's SSA in the sense that it doesn't have any registers, but it
isn't really useful SSA because it still has a pile of load/store
intrinsics that we will need to get rid of.

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>

This pass analizes all of the load/store operations and, when a variable is
never aliased (potentially used by an indirect operation), it is lowered
directly to an SSA value.  This pass translates to SSA directly and does
not require any fixup by the original to-SSA pass.

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>

This is killing piglit.  I'll leave the logging local

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>

Instead, we give SSA definitions a temporary index of 0xFFFFFFFF if the
instruction does not have a block and a proper index when it actually gets
added to the list.

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>

Previously, we used a string name.  It was nice for translating out of GLSL
IR (which also does that) but cumbersome the rest of the time.

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>

Backends want to be able to do special things with constant values such as
put them into immediates or make decisions based on whether or not a value
is constant.  Before, constants always got lowered to a load_const into a
register and then a register use.  Now we leave constants as SSA values so
backends can special-case them if they want.  Since handling constant SSA
values is trivial, this shouldn't be a problem for backends.

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>

This pass is still fairly basic.  It only handles ALU operations, constant
loads, and phi nodes.  No texture ops or intrinsics yet.

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>