https://bugs.llvm.org/show_bug.cgi?id=44245
Bug ID: 44245
Summary: [InstCombine] Infinite loop in a bitcode generated by
rustc
Product: new-bugs
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: release blocker
Priority: P
Component: new bugs
Assignee: unassignedb...@nondot.org
Reporter: pho...@chromium.org
CC: htmldevelo...@gmail.com, llvm-bugs@lists.llvm.org
Created attachment 22917
--> https://bugs.llvm.org/attachment.cgi?id=22917&action=edit
bitcode reproducer (reduced with bugpoint)
We're seeing what appears to be an infinite loop when running instcombine on a
bitcode file generated by rustc (the related Rust issue is
https://github.com/rust-lang/rust/issues/66036).
We've managed to create a reproducer and then further reduce it by using
bugpoint. This behavior can be reproduced by simply running:
opt -instcombine bugpoint-reduced-simplified.bc -o out
We've tried all the version from trunk to 6.0 and it reproduces with all of
them so this doesn't appear to be a recent regression.
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