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[Bug rtl-optimization/53278] [4.8 regression] internal compiler error: in df_uses_record, at df-scan.c:3179 when compiling libgcc2.c __mulvdi3 on armv5tel-linux
- From: "ramana at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 08 May 2012 14:56:18 +0000
- Subject: [Bug rtl-optimization/53278] [4.8 regression] internal compiler error: in df_uses_record, at df-scan.c:3179 when compiling libgcc2.c __mulvdi3 on armv5tel-linux
- Auto-submitted: auto-generated
- References: <bug-53278-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53278
--- Comment #3 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> 2012-05-08 14:56:18 UTC ---
The patch below appears to trigger the issue but there's a fundamental question
as to why lower-subreg generates concatns when the documentation suggests that
concat and concatn should only be used in declarations but not in the insn
stream.
http://gcc.gnu.org/ml/gcc-patches/2012-05/msg00423.html