[PATCH] D128382: [LLD] Two tweaks to symbol ordering scheme

[YongKang Zhu via Phabricator via llvm-commits]

yozhu added a comment.

In D128382#3603513 <https://reviews.llvm.org/D128382#3603513>, @MaskRay wrote:

> Please answer why `executableInputSections > 1` is needed.

If there is zero or only one input section having instructions, the scenario of "hot code calling into cold code" doesn't exist.

In D128382#3603513 <https://reviews.llvm.org/D128382#3603513>, @MaskRay wrote:

> How does it save one page?

Hot code will always be placed together, so where it starts impact how many pages it will occupy.  Moving it towards the beginning of the output section increases the possibility that one less page will be taken.


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