http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52419
Bug #: 52419 Summary: Wrong expansion of misaligned vector store Classification: Unclassified Product: gcc Version: 4.7.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: middle-end AssignedTo: unassig...@gcc.gnu.org ReportedBy: jamb...@gcc.gnu.org CC: rgue...@gcc.gnu.org Host: x86_64linux-gnu Target: x86_64linux-gnu Created attachment 26773 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26773 Testcase When I compile the attached testcase, even at -O0, the resulting binary aborts because the vector value is {5,3} instead of expected {3,5}. When I remove the aligned and packed attributes, the testcase works as expected.