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Code generator needs DominatorTree #1725

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lattner opened this issue Apr 25, 2007 · 2 comments
Closed

Code generator needs DominatorTree #1725

lattner opened this issue Apr 25, 2007 · 2 comments
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bugzilla Issues migrated from bugzilla llvm:codegen

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@lattner
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lattner commented Apr 25, 2007

Bugzilla Link 1353
Resolution FIXED
Resolved on Feb 18, 2008 00:59
Version trunk
OS All

Extended Description

Various bits of the code generator need dominator information. The register allocator wants loop depth to
compute spill weight, and future phi elimination stuff need dominator information. Currently we look
back at the LLVM CFG, but this doesn't work well for multiple reasons (there is a many to one mapping
from llvm bb to MBBs, MBB edges can get deleted, etc).

-Chris
@lattner
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lattner commented May 23, 2007

From dominators, we would build natural loop info.

@lattner
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lattner commented Feb 18, 2008

Owen implemented this.

@llvmbot llvmbot transferred this issue from llvm/llvm-bugzilla-archive Dec 3, 2021
troelsbjerre pushed a commit to troelsbjerre/llvm-project that referenced this issue Jan 10, 2024
@epilk
Merge pull request llvm#1725 from apple/cherry-pick-66250047
646ddbd 
[CodeGen] Make sure the EH cleanup for block captures is conditional …
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