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List: llvm-bugs
Subject: [LLVMbugs] [Bug 6186] New: hang in tail duplication compiling
From: bugzilla-daemon () cs ! uiuc ! edu
Date: 2010-01-31 8:17:11
Message-ID: bug-6186-206 () http ! llvm ! org/bugs/
[Download RAW message or body]
http://llvm.org/bugs/show_bug.cgi?id=6186
Summary: hang in tail duplication compiling js_Interpret from
Firefox
Product: new-bugs
Version: unspecified
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: new bugs
AssignedTo: unassignedbugs@nondot.org
ReportedBy: sharparrow1@yahoo.com
CC: llvmbugs@cs.uiuc.edu
Blocks: 5511
Created an attachment (id=4148)
--> (http://llvm.org/bugs/attachment.cgi?id=4148)
Testcase
Testcase attached; to reproduce, run "llc xx.bc". A few quick backtraces seem
to pin the issue on UpdateSuccessorsPHIs in TailDuplication.cpp, but I haven't
looked closely.
This might actually be a performance issue rather than a hang, but the file
takes 2.5 seconds to compile at -O0 and at least 4 minutes to compile with
optimization.
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