glsl: Remove CSE pass

Graphics / Mesa 3D Graphics Library / Mesa - Matt Turner [gmail.com] - 5 October 2015 16:31 UTC

With NIR, it actually hurts things.

total instructions in shared programs: 6529329 -> 6528888 (-0.01%) instructions in affected programs: 14833 -> 14392 (-2.97%) helped: 299 HURT: 1

In all affected programs I inspected (including the single hurt one) the pass CSE'd some multiplies and caused some reassociation (e.g., caused (A * B) * C to be A * (B * C)) when the original intermediate result was reused elsewhere.

617eb5e glsl: Remove CSE pass.
src/glsl/Makefile.sources | 1 -
src/glsl/glsl_parser_extras.cpp | 1 -
src/glsl/ir_optimization.h | 1 -
src/glsl/opt_cse.cpp | 472 ---------------------------------------
4 files changed, 475 deletions(-)

Upstream: cgit.freedesktop.org

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