diff options
Diffstat (limited to 'compiler/rustc_mir_transform/src')
| -rw-r--r-- | compiler/rustc_mir_transform/src/simplify.rs | 25 |
1 files changed, 0 insertions, 25 deletions
diff --git a/compiler/rustc_mir_transform/src/simplify.rs b/compiler/rustc_mir_transform/src/simplify.rs index e3cfd1d0afc..d6cd505cbb5 100644 --- a/compiler/rustc_mir_transform/src/simplify.rs +++ b/compiler/rustc_mir_transform/src/simplify.rs @@ -95,8 +95,6 @@ impl<'a, 'tcx> CfgSimplifier<'a, 'tcx> { pub fn simplify(mut self) { self.strip_nops(); - let mut start = START_BLOCK; - // Vec of the blocks that should be merged. We store the indices here, instead of the // statements itself to avoid moving the (relatively) large statements twice. // We do not push the statements directly into the target block (`bb`) as that is slower @@ -105,8 +103,6 @@ impl<'a, 'tcx> CfgSimplifier<'a, 'tcx> { loop { let mut changed = false; - self.collapse_goto_chain(&mut start, &mut changed); - for bb in self.basic_blocks.indices() { if self.pred_count[bb] == 0 { continue; @@ -149,27 +145,6 @@ impl<'a, 'tcx> CfgSimplifier<'a, 'tcx> { break; } } - - if start != START_BLOCK { - debug_assert!(self.pred_count[START_BLOCK] == 0); - self.basic_blocks.swap(START_BLOCK, start); - self.pred_count.swap(START_BLOCK, start); - - // pred_count == 1 if the start block has no predecessor _blocks_. - if self.pred_count[START_BLOCK] > 1 { - for (bb, data) in self.basic_blocks.iter_enumerated_mut() { - if self.pred_count[bb] == 0 { - continue; - } - - for target in data.terminator_mut().successors_mut() { - if *target == start { - *target = START_BLOCK; - } - } - } - } - } } /// This function will return `None` if |