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mark calls in the unwind path as !noinline - #42771
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nagisa
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Jun 20, 2017
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Any reason noinline over cold was used? |
nagisa
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Jun 20, 2017
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Either way, can always change later if there any benefits to do so. @bors r+ |
bors
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Jun 20, 2017
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📌 Commit 485e799 has been approved by |
kennytm
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Jun 20, 2017
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Should this ignore-test comment be removed, or is the test still failing?
The unwind path is always cold, so that should not have bad performance implications. This avoids catastrophic exponential inlining, and also decreases the size of librustc.so by 1.5% (OTOH, the size of `libstd.so` increased by 0.5% for some reason). Fixesrust-lang#41696.
arielb1
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Jun 20, 2017
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Indeed. @bors r=nagisa |
bors
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Jun 20, 2017
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📌 Commit 0b93798 has been approved by |
arielb1
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Jun 20, 2017
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Indeed. @bors r=nagisa |
bors
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Jun 20, 2017
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💡 This pull request was already approved, no need to approve it again.
|
bors
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Jun 20, 2017
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📌 Commit 0b93798 has been approved by |
arielb1
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Jun 21, 2017
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Had an accidental push @bors r=nagisa |
bors
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Jun 21, 2017
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📌 Commit 0b93798 has been approved by |
bors
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Jun 21, 2017
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Jun 21, 2017
mark calls in the unwind path as !noinline The unwind path is always cold, so that should not have bad performance implications. This avoids catastrophic exponential inlining, and also decreases the size of librustc.so by 1.5% (OTOH, the size of `libstd.so` increased by 0.5% for some reason). Fixes#41696. r? @nagisa
bors
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Jun 22, 2017
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☀️ Test successful - status-appveyor, status-travis |
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Jan 1, 2022
Mark drop calls in landing pads `cold` instead of `noinline` Now that deferred inlining has been disabled in LLVM (rust-lang#92110), this shouldn't cause catastrophic size blowup. I confirmed that the test cases from rust-lang#41696 (comment) still compile quickly (<1s) after this change. ~Although note that I wasn't able to reproduce the original issue using a recent rustc/llvm with deferred inlining enabled, so those tests may no longer be representative. I was also unable to create a modified test case that reproduced the original issue.~ (edit: I reproduced it on CI by accident--the first commit timed out on the LLVM 12 builder, because I forgot to make it conditional on LLVM version) r? `@nagisa` cc `@arielb1` (this effectively reverts rust-lang#42771 "mark calls in the unwind path as !noinline") cc `@RalfJung` (fixesrust-lang#46515) edit: also fixesrust-lang#87055
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Feb 1, 2022
Mark drop calls in landing pads `cold` instead of `noinline` Now that deferred inlining has been disabled in LLVM (rust-lang#92110), this shouldn't cause catastrophic size blowup. I confirmed that the test cases from rust-lang#41696 (comment) still compile quickly (<1s) after this change. ~Although note that I wasn't able to reproduce the original issue using a recent rustc/llvm with deferred inlining enabled, so those tests may no longer be representative. I was also unable to create a modified test case that reproduced the original issue.~ (edit: I reproduced it on CI by accident--the first commit timed out on the LLVM 12 builder, because I forgot to make it conditional on LLVM version) r? `@nagisa` cc `@arielb1` (this effectively reverts rust-lang#42771 "mark calls in the unwind path as !noinline") cc `@RalfJung` (fixesrust-lang#46515) edit: also fixesrust-lang#87055
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The unwind path is always cold, so that should not have bad performance
implications. This avoids catastrophic exponential inlining, and also
decreases the size of librustc.so by 1.5% (OTOH, the size of
libstd.soincreased by 0.5% for some reason).
Fixes#41696.
r? @nagisa