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Remove comment about a branch being optimized out, fix #45831

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Most often, this code is used through the `std::heap::Heap`
and `#[gloabal_allocator]` indirection, so this branch is not
optimized out anymore.
This commit is contained in:
Simon Sapin 2017-11-20 15:55:31 +01:00
parent 2dd268b652
commit 43e32b5346
2 changed files with 2 additions and 4 deletions
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3
src/liballoc_jemalloc/lib.rs
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@ -72,8 +72,7 @@ mod contents {
const MALLOCX_ZERO: c_int = 0x40;
// The minimum alignment guaranteed by the architecture. This value is used to
// add fast paths for low alignment values. In practice, the alignment is a
// constant at the call site and the branch will be optimized out.
// add fast paths for low alignment values.
#[cfg(all(any(target_arch = "arm",
target_arch = "mips",
target_arch = "powerpc")))]

3
src/liballoc_system/lib.rs
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@ -25,8 +25,7 @@
#![rustc_alloc_kind = "lib"]
// The minimum alignment guaranteed by the architecture. This value is used to
// add fast paths for low alignment values. In practice, the alignment is a
// constant at the call site and the branch will be optimized out.
// add fast paths for low alignment values.
#[cfg(all(any(target_arch = "x86",
target_arch = "arm",
target_arch = "mips",