Add a simple tuple optimization pass (#5937)

In some cases tuples are obviously not needed, such as when they are only used
in local operations and make/extract. Such tuples are not used as return values or
in control flow structures, so we might as well lower them to individual locals per
lane, which other passes can optimize a lot better.

I believe LLVM does the same with its own tuples: it lowers them as much as
possible, leaving only necessary ones.

Fixes #5923

1 files changed, 1 insertions, 0 deletions

diff --git a/src/passes/passes.h b/src/passes/passes.h
index fa6d98111..1cd2a5672 100644
--- a/src/passes/passes.h
+++ b/src/passes/passes.h
@@ -153,6 +153,7 @@ Pass* createSSAifyPass();
 Pass* createSSAifyNoMergePass();
 Pass* createTrapModeClamp();
 Pass* createTrapModeJS();
+Pass* createTupleOptimizationPass();
 Pass* createTypeRefiningPass();
 Pass* createTypeMergingPass();
 Pass* createTypeSSAPass();