It doesn't handle things like (vector * matrix) correctly, and
apparently Matt's intention was to bail.
Fixes shader compilation in Natural Selection 2.
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
If we saw a tree that looked like
vec3
/ \
vec3 float
/ \
vec3 float
/ \
vec3 float
We would see that all of the expression types were vec3, and then
rebalance to
vec3
/ \
vec3 vec3 <-- should be float
/ \ / \
vec3 float float float
This patch adds code to visit the rebalanced tree and update the
expression types from the bottom up.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=80880
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
The intention of this pass was to give us better instruction scheduling
opportunities, but it unexpectedly reduced some instruction counts as
well:
total instructions in shared programs: 1666639 -> 1666073 (-0.03%)
instructions in affected programs: 54612 -> 54046 (-1.04%)
(and trades 4 SIMD16 programs in SS3)
