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chore(ssa): Remove mem2reg run before flattening #4415

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Feb 23, 2024
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chore(ssa): Remove mem2reg run before flattening #4415

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5 changes: 0 additions & 5 deletions compiler/noirc_evaluator/src/ssa.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -54,11 +54,6 @@ pub(crate) fn optimize_into_acir(
.try_run_pass(Ssa::evaluate_assert_constant, "After Assert Constant:")?
.try_run_pass(Ssa::unroll_loops, "After Unrolling:")?
.run_pass(Ssa::simplify_cfg, "After Simplifying:")
// Run mem2reg before flattening to handle any promotion
// of values that can be accessed after loop unrolling.
// If there are slice mergers uncovered by loop unrolling
// and this pass is missed, slice merging will fail inside of flattening.
.run_pass(Ssa::mem2reg, "After Mem2Reg:")
.run_pass(Ssa::flatten_cfg, "After Flattening:")
.run_pass(Ssa::remove_bit_shifts, "After Removing Bit Shifts:")
// Run mem2reg once more with the flattened CFG to catch any remaining loads/stores
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