[LLVMbugs] [Bug 6186] New: hang in tail duplication compiling js_Interpret from Firefox
bugzilla-daemon at cs.uiuc.edu
bugzilla-daemon at cs.uiuc.edu
Sun Jan 31 00:17:11 PST 2010
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 at nondot.org
ReportedBy: sharparrow1 at yahoo.com
CC: llvmbugs at 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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