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nir: return early when lowering a return at the end of a function

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Otherwise we create unused conditional return flags and things
get unnecessarily ugly fast when lowering nested functions.

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
This commit is contained in:
Timothy Arceri 2018-04-08 21:47:32 +10:00
parent d3cafc18fc
commit 6e22ad6edc
1 changed files with 6 additions and 0 deletions
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6
src/compiler/nir/nir_lower_returns.c
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@ -180,6 +180,12 @@ lower_returns_in_block(nir_block *block, struct lower_returns_state *state)
nir_instr_remove(&jump->instr); nir_instr_remove(&jump->instr);
/* If this is a return in the last block of the function there is nothing
* more to do once its removed.
*/
if (block == nir_impl_last_block(state->builder.impl))
return true;
nir_builder *b = &state->builder; nir_builder *b = &state->builder;
/* Set the return flag */ /* Set the return flag */