http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49352
Summary: [4.7 Regression] -fcompare-debug failure with -O2 -ftree-vectorize Product: gcc Version: 4.7.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization 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 24481 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24481 reduced testcase Compiler output: $ gcc -O2 -ftree-vectorize -fcompare-debug testcase.c gcc: error: testcase.c: -fcompare-debug failure (length) The code is not vectorized with -g. Tested revisions: r174860 - fail 4.6 r173059 - OK