http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46771
Summary: [4.6 Regression] -fcompare-debug failure (length) with -O -ftree-vectorize Product: gcc Version: 4.6.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: debug AssignedTo: unassig...@gcc.gnu.org ReportedBy: zso...@seznam.cz CC: aol...@gcc.gnu.org Host: x86_64-pc-linux-gnu Target: x86_64-pc-linux-gnu Created attachment 22607 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22607 reduced testcase Output: $ gcc -O -ftree-vectorize -fcompare-debug pr46771.c gcc: error: pr46771.c: -fcompare-debug failure (length) $ diff pr46771.*gkd 11c11 ...(long output) There's a difference in generated code with(out) -g. Tested revisions: r167383 - fail r165699 - fail r161659 - OK 4.5 r166509 - OK