nir: Add a flag for lowering fsat.

vc4 cse/algebraic-disabled stats:
total instructions in shared programs: 44356 -> 44354 (-0.00%)
instructions in affected programs:     55 -> 53 (-3.64%)

v2: Rebase to master (no TGSI->NIR present)

Reviewed-by: Kenneth Graunke <[email protected]> (v1)

1 files changed, 1 insertions, 0 deletions

diff --git a/src/glsl/nir/nir.h b/src/glsl/nir/nir.h
index 7be1abb5743..f46ec151f6d 100644
--- a/src/glsl/nir/nir.h
+++ b/src/glsl/nir/nir.h
@@ -1329,6 +1329,7 @@ typedef struct nir_function {
 typedef struct nir_shader_compiler_options {
    bool lower_ffma;
    bool lower_fpow;
+   bool lower_fsat;
    bool lower_fsqrt;
    /** lowers fneg and ineg to fsub and isub. */
    bool lower_negate;