http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46280
Summary: [4.6 regression] Several testcases FAIL with 16byte alignment ABI warning on Solaris 8/9 x86 Product: gcc Version: 4.6.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: target AssignedTo: unassig...@gcc.gnu.org ReportedBy: r...@gcc.gnu.org CC: h...@gcc.gnu.org Host: i386-pc-solaris2.[89] Target: i386-pc-solaris2.[89] Build: i386-pc-solaris2.[89] Between 20101022 and 20101029, several testcases started to FAIL on Solaris 8 and 9/x86, e.g. +FAIL: g++.dg/eh/simd-2.C (test for excess errors) Excess errors: /vol/gcc/src/hg/trunk/local/gcc/testsuite/g++.dg/eh/simd-2.C:13:8: note: The ABI of passing parameter with 16byte alignment has changed in GCC 4.6 This is almost certainly related to this patch 2010-10-26 H.J. Lu <hongjiu...@intel.com> PR target/44948 * config/i386/i386.c (ix86_old_function_arg_boundary): New. (ix86_function_arg_boundary): Always align parameters on stack in 64bit and align parameters with alignment >= 16byte on stack in 32bit. Warn alignment change. and the fact that those targets default to -march=pentiumpro instead of -march=pentium4, since the tests pass with -march=pentium4. Here's the list of affected testcases: g++.dg/eh/simd-2.C g++.dg/opt/combine.C g++.dg/torture/pr36444.C g++.dg/torture/pr36445.C gcc.c-torture/compile/pr34856.c gcc.c-torture/compile/pr39928-1.c gcc.c-torture/compile/vector-1.c gcc.c-torture/compile/vector-2.c gcc.c-torture/execute/va-arg-25.c gcc.c-torture/execute/vector-1.c gcc.c-torture/execute/vector-2.c gcc.dg/pr32912-1.c gcc.dg/tree-ssa/forwprop-5.c gcc.dg/tree-ssa/fre-vce-1.c gcc.dg/tree-ssa/sra-4.c gcc.dg/tree-ssa/vector-1.c gcc.dg/tree-ssa/vector-2.c gcc.target/i386/vect-args.c