OpenHarmony/third_party_mesa3d
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glsl: Add a lowering pass to move discards out of if-statements.

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This should allow lower_if_to_cond_assign to work in the presence of
discards, fixing bug #31690 and likely #31983.

NOTE: This is a candidate for the 7.9 branch.
This commit is contained in:
Kenneth Graunke
2010-11-25 01:09:26 -08:00
parent 9a1d063c6d
commit 940df10100
5 changed files with 204 additions and 1 deletions
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4
src/mesa/program/ir_to_mesa.cpp
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@@ -2858,8 +2858,10 @@ _mesa_ir_link_shader(struct gl_context *ctx, struct gl_shader_program *prog)
progress = lower_quadop_vector(ir, true) || progress;
if (options->EmitNoIfs)
if (options->EmitNoIfs) {
progress = lower_discard(ir) || progress;
progress = do_if_to_cond_assign(ir) || progress;
}
if (options->EmitNoNoise)
progress = lower_noise(ir) || progress;