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SubRange join failure #34721

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dstutt opened this issue Nov 21, 2017 · 1 comment
Closed

SubRange join failure #34721

dstutt opened this issue Nov 21, 2017 · 1 comment
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bugzilla Issues migrated from bugzilla llvm:regalloc

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@dstutt
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dstutt commented Nov 21, 2017

Bugzilla Link 35373
Version trunk
OS All
Attachments Reproducer for subrange join failure

Extended Description

There are some other SubRange join failures reported, but since the ones I've investigated have resulted in different fixes I'm filing a fresh one for this reproducer.

See bug 32773, bug 33152 and bug 33524 for details of the others

The attached reproducer will provoke the problem.

Easiest way to do this is:
llc -march=amdgcn -run-pass simple-register-coalescer -o - regcoal-subrange-join-seg.mir
@llvmbot llvmbot transferred this issue from llvm/llvm-bugzilla-archive Dec 10, 2021
@arsenm
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arsenm commented Aug 8, 2023

regcoal-subrange-join-seg.mir.txt

Modernized testcase works now

@arsenm arsenm closed this as completed Aug 8, 2023
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