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Bug 49878 - Instcombine hangs after 5207cde5cb4147155c469e1861427ea9d569bd5a
Summary: Instcombine hangs after 5207cde5cb4147155c469e1861427ea9d569bd5a
Status: RESOLVED FIXED
Alias: None
Product: libraries
Classification: Unclassified
Component: Scalar Optimizations (show other bugs)
Version: trunk
Hardware: PC All
: P normal
Assignee: Unassigned LLVM Bugs
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2021-04-07 03:37 PDT by Benjamin Kramer
Modified: 2021-04-07 09:37 PDT (History)
6 users (show)

See Also:
Fixed By Commit(s): 1894c6c59e37

Attachments
reduced test case (2.62 KB, text/plain)
2021-04-07 03:37 PDT, Benjamin Kramer 		Details
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Description Benjamin Kramer 2021-04-07 03:37:44 PDT 
Created attachment 24728 [details]
reduced test case

$ opt -instcombine t.ll -S
<hangs>

This worked before 5207cde5cb4147155c469e1861427ea9d569bd5a
Comment 1 Sanjay Patel 2021-04-07 05:51:16 PDT 
There's another reduced test for what is likely the same problem at: https://reviews.llvm.org/D99674
Comment 2 Sanjay Patel 2021-04-07 09:13:36 PDT 
Proposal:
https://reviews.llvm.org/D100044
Comment 3 Sanjay Patel 2021-04-07 09:37:50 PDT 
https://reviews.llvm.org/rG1894c6c59e37