With -O2 -ffast-math on Linux/x86-64, I got Running (#1) 482.sphinx3 ref base o2 default Error with '/export/spec/src/2006/spec/bin/specinvoke -E -d /export/spec/src/2006/spec/benchspec/CPU2006/482.sphinx3/run/run_base_ref_o2.0000 -c 1 -e compare.err -o compare.stdout -f compare.cmd': check file '/export/spec/src/2006/spec/benchspec/CPU2006/482.sphinx3/run/run_base_ref_o2.0000/.err' *** Miscompare of considered.out, see /export/spec/src/2006/spec/benchspec/CPU2006/482.sphinx3/run/run_base_ref_o2.0000/considered.out.mis Invalid run; unable to continue. If you wish to ignore errors please use '-I' or ignore_errors
You can get sphinx3 from http://cmusphinx.sourceforge.net/html/download.php#sphinx3 The miscompiled file is cmn_prior.c. The difference in assembly output between revision 125029 and revision 125030 is --- revision 125029 cmn_prior.s 2007-06-01 12:15:49.000000000 -0700 +++ revision 125030 cmn_prior.s 2007-06-01 12:16:17.000000000 -0700 @@ -78,21 +78,22 @@ cmn_prior: testl %ebp, %ebp movsd .LC6(%rip), %xmm0 divsd %xmm1, %xmm0 - cvtsd2ss %xmm0, %xmm1 + cvtsd2ss %xmm0, %xmm2 jle .L10 xorl %eax, %eax .L11: - movaps %xmm1, %xmm0 + movaps %xmm2, %xmm0 mulss (%rcx,%rax,4), %xmm0 movss %xmm0, (%rsi,%rax,4) addq $1, %rax cmpl %eax, %ebp jg .L11 - mulss .LC7(%rip), %xmm1 xorl %eax, %eax + movss .LC7(%rip), %xmm1 .L12: movss (%rcx,%rax,4), %xmm0 mulss %xmm1, %xmm0 + mulss %xmm2, %xmm0 movss %xmm0, (%rcx,%rax,4) addq $1, %rax cmpl %eax, %ebp @@ -107,11 +108,11 @@ cmn_prior: testl %ebp, %ebp cvtsi2sd %edx, %xmm1 divsd %xmm1, %xmm0 - cvtsd2ss %xmm0, %xmm1 + cvtsd2ss %xmm0, %xmm2 jle .L13 xorl %eax, %eax .L14: - movaps %xmm1, %xmm0 + movaps %xmm2, %xmm0 mulss (%rcx,%rax,4), %xmm0 movss %xmm0, (%rsi,%rax,4) addq $1, %rax @@ -122,11 +123,12 @@ cmn_prior: jle .L17 testl %ebp, %ebp jle .L15 - mulss .LC7(%rip), %xmm1 xorl %eax, %eax + movss .LC7(%rip), %xmm1 .L16: movss (%rcx,%rax,4), %xmm0 mulss %xmm1, %xmm0 + mulss %xmm2, %xmm0 movss %xmm0, (%rcx,%rax,4) addq $1, %rax cmpl %eax, %ebp -- Summary: Gcc 4.3 revision 125030 miscompiles 482.sphinx3 in SPEC CPU 2006 Product: gcc Version: 4.3.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: hjl at lucon dot org GCC target triplet: x86_64-unknown-linux-gnu http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32183
