http://llvm.org/bugs/show_bug.cgi?id=20370
Bug ID: 20370
Summary: clang hangs with -O
Product: clang
Version: 3.4
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: C++
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
Classification: Unclassified
Created attachment 12795
--> http://llvm.org/bugs/attachment.cgi?id=12795&action=edit
Clang will hang while this file with -O2
Compiling the attached .cpp file causes clang to hang when using -O2 and above
(at least 8 minutes on my machine). It could be related to bug 18898 since the
file contains switch statements, but this file is very small in comparison with
only 42 cases (vs. tens of thousands). I tried to reduce the code as much as I
could, but if I remove any more, the file compiles fine in no time at all.
> clang --version
clang version 3.4.2 (tags/RELEASE_34/dot2-final)
Target: x86_64-unknown-linux-gnu
Thread model: posix
Command to cause the hang:
clang -Wall -c -O2 optimizerhang.cpp
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