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Remove TrustedLen requirement from BuilderMethods::switch

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The main use case of TrustedLen is allowing APIs to specialize on it,
but no use of it uses that specialization. Instead, only the .len()
function provided by ExactSizeIterator is used, which is already
required to be accurate.

Thus, the TrustedLen requirement on BuilderMethods::switch is redundant.
This commit is contained in:
est31 2020-09-24 19:10:34 +02:00
parent 893fadd11a
commit 12ada5cf4b
4 changed files with 2 additions and 6 deletions
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3
compiler/rustc_codegen_llvm/src/builder.rs
View File

@ -21,7 +21,6 @@ use rustc_target::abi::{self, Align, Size};
use rustc_target::spec::{HasTargetSpec, Target};
use std::borrow::Cow;
use std::ffi::CStr;
use std::iter::TrustedLen;
use std::ops::{Deref, Range};
use std::ptr;
use tracing::debug;
@ -179,7 +178,7 @@ impl BuilderMethods<'a, 'tcx> for Builder<'a, 'll, 'tcx> {
&mut self,
v: &'ll Value,
else_llbb: &'ll BasicBlock,
cases: impl ExactSizeIterator<Item = (u128, &'ll BasicBlock)> + TrustedLen,
cases: impl ExactSizeIterator<Item = (u128, &'ll BasicBlock)>,
) {
let switch =
unsafe { llvm::LLVMBuildSwitch(self.llbuilder, v, else_llbb, cases.len() as c_uint) };

1
compiler/rustc_codegen_llvm/src/lib.rs
View File

@ -12,7 +12,6 @@
#![feature(in_band_lifetimes)]
#![feature(nll)]
#![feature(or_patterns)]
#![feature(trusted_len)]
#![recursion_limit = "256"]
use back::write::{create_informational_target_machine, create_target_machine};

1
compiler/rustc_codegen_ssa/src/lib.rs
View File

@ -6,7 +6,6 @@
#![feature(in_band_lifetimes)]
#![feature(nll)]
#![feature(or_patterns)]
#![feature(trusted_len)]
#![feature(associated_type_bounds)]
#![recursion_limit = "256"]

3
compiler/rustc_codegen_ssa/src/traits/builder.rs
View File

@ -18,7 +18,6 @@ use rustc_middle::ty::Ty;
use rustc_target::abi::{Abi, Align, Scalar, Size};
use rustc_target::spec::HasTargetSpec;
use std::iter::TrustedLen;
use std::ops::Range;
#[derive(Copy, Clone)]
@ -60,7 +59,7 @@ pub trait BuilderMethods<'a, 'tcx>:
&mut self,
v: Self::Value,
else_llbb: Self::BasicBlock,
cases: impl ExactSizeIterator<Item = (u128, Self::BasicBlock)> + TrustedLen,
cases: impl ExactSizeIterator<Item = (u128, Self::BasicBlock)>,
);
fn invoke(
&mut self,