https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69634
Bug ID: 69634 Summary: -fcompare-debug failure (length) with -O2 -fno-dce -fschedule-insns -fno-tree-vrp @ i686 Product: gcc Version: 6.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: target Assignee: unassigned at gcc dot gnu.org Reporter: zsojka at seznam dot cz Target Milestone: --- Host: x86_64-pc-linux-gnu Target: i686-pc-linux-gnu Created attachment 37560 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37560&action=edit reduced testcase Compiler output: $ i686-pc-linux-gnu-gcc -O2 -fno-dce -fschedule-insns -fno-tree-vrp -fcompare-debug testcase.c testcase.c: In function 'foo': testcase.c:7:1: note: The ABI for passing parameters with 16-byte alignment has changed in GCC 4.6 foo(u16 u16_1, v16u16 v16u16_0, v16u32 v16u64_0, v16u16 v16u16_1, v16u32 v16u32_1, v16u64 v16u64_1) ^~~ testcase.c:7:1: warning: SSE vector argument without SSE enabled changes the ABI [-Wpsabi] i686-pc-linux-gnu-gcc: error: testcase.c: -fcompare-debug failure (length) $ i686-pc-linux-gnu-gcc -v Using built-in specs. COLLECT_GCC=/repo/gcc-trunk/binary-latest-i686/bin/i686-pc-linux-gnu-gcc COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-233042-checking-yes-rtl-df-nographite-i686/bin/../libexec/gcc/i686-pc-linux-gnu/6.0.0/lto-wrapper Target: i686-pc-linux-gnu Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++ --enable-checking=yes,rtl,df --without-cloog --without-ppl --without-isl --build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu --target=i686-pc-linux-gnu --with-ld=/usr/bin/i686-pc-linux-gnu-ld --with-as=/usr/bin/i686-pc-linux-gnu-as --with-sysroot=/usr/i686-pc-linux-gnu --disable-libstdcxx-pch --prefix=/repo/gcc-trunk//binary-trunk-233042-checking-yes-rtl-df-nographite-i686 Thread model: posix gcc version 6.0.0 20160201 (experimental) (GCC) Tested revisions: r233042 - FAIL 5-branch r233031 - OK