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Reuse vector

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This commit is contained in:
Dániel Buga 2020-10-14 10:54:17 +02:00
parent a7f2bb6343
commit 45faeb43ae
1 changed files with 5 additions and 1 deletions
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6
compiler/rustc_ast_lowering/src/expr.rs
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@ -1367,14 +1367,18 @@ impl<'hir> LoweringContext<'_, 'hir> {
let mut used_input_regs = FxHashMap::default();
let mut used_output_regs = FxHashMap::default();
let mut required_features: Vec<&str> = vec![];
for (idx, op) in operands.iter().enumerate() {
let op_sp = asm.operands[idx].1;
if let Some(reg) = op.reg() {
// Make sure we don't accidentally carry features from the
// previous iteration.
required_features.clear();
// Validate register classes against currently enabled target
// features. We check that at least one type is available for
// the current target.
let reg_class = reg.reg_class();
let mut required_features: Vec<&str> = vec![];
for &(_, feature) in reg_class.supported_types(asm_arch) {
if let Some(feature) = feature {
if self.sess.target_features.contains(&Symbol::intern(feature)) {