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[SR-9008] Can't optimize away reworked string interpolation in a Void context on Linux #51511

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beccadax opened this issue Oct 16, 2018 · 3 comments
Open

[SR-9008] Can't optimize away reworked string interpolation in a Void context on Linux #51511

beccadax opened this issue Oct 16, 2018 · 3 comments
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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler in itself

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@beccadax
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Previous ID SR-9008
Radar rdar://problem/45294605
Original Reporter @beccadax
Type Bug
Additional Detail from JIRA
Votes 0
Component/s Compiler
Labels Bug
Assignee None
Priority Medium

md5: 01744141a6715d266b88b8727cce77a4

Issue Description:

Post-SE-0228, the function string_interpolation() in test/SILOptimizer/unused_containers.swift does not optimize down to an empty function on the Linux CI. The test still passes on Darwin.
@milseman
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milseman mannequin commented Oct 16, 2018

@swift-ci create

@swift-ci
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Comment by Ravichandhran Kandhadai Madhavan (JIRA)

Was there any further insight into this issue? I was wondering what are the dead instructions that weren't eliminated.

@beccadax
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Something like it may actually be happening on Darwin, because the DeadArray benchmark (which also has a string interpolation whose result is unused) is one of the ones doing worst in the branch. Once we've got that issue licked, I wouldn't be surprised to see the XFAILed test start working again on Linux.

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler in itself
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