On Fri, Sep 2, 2011 at 3:21 PM, Michael Hope <michael.h...@linaro.org> wrote: > On Fri, Sep 2, 2011 at 1:46 AM, Andrew Stubbs <andrew.stu...@gmail.com> wrote: >> Do we know anything about "Csmith"? >> >> Maybe we should try it? > > I couldn't resist having a go. It's Friday afternoon after all. > > I put on my end user hat, built csmith 2.0, fixed the x86 assembly > code, and started it running against gcc-linaro-4.6-2011.08 at -O2 and > -O3. 772 tests so far and no faults. I'll leave it running over the > weekend. > > I quite like the big red warnings on the 'using' page[1].
A weekend and 42,237 tests later, the compiler crashed six times. The files and compiler output are at: http://people.linaro.org/~michaelh/incoming/csmith/ There are four variants of a (set (reg:SI) (minus:SI (const_int) (const_int))) which might be a real fault. There is one (set (reg:SI (neg:SI (const_int)))) and one ICE in find_valid_class(). I haven't looked into the code to see if the tests are valid. The Natty GCC on x86_64 compiles all of them just fine. The ICEs are: crash4.c:1103:1: error: insn does not satisfy its constraints: (insn 750 346 376 28 (set (reg:SI 12 ip [orig:492 si1 ] [492]) (minus:SI (const_int 12 [0xc]) (const_int -511334738 [0xffffffffe185a6ae]))) crash4.c:1037 29 {*arm_subsi3_insn} (nil)) crash4.c:1103:1: internal compiler error: in copyprop_hardreg_forward_1, at regcprop.c:766 crash5.c:792:1: error: insn does not satisfy its constraints: (insn 726 230 742 16 (set (reg:SI 7 r7 [319]) (minus:SI (const_int 7 [0x7]) (const_int 65535 [0xffff]))) ../runtime/safe_math.h:658 29 {*arm_subsi3_insn} (nil)) crash5.c:792:1: internal compiler error: in copyprop_hardreg_forward_1, at regcprop.c:766 crash6.c:216:1: error: insn does not satisfy its constraints: (insn 528 443 209 15 (set (reg:SI 1 r1 [374]) (minus:SI (const_int 3 [0x3]) (const_int 1038957434 [0x3ded3b7a]))) ../runtime/safe_math.h:175 29 {*arm_subsi3_insn} (nil)) crash6.c:216:1: internal compiler error: in copyprop_hardreg_forward_1, at regcprop.c:766 crash1.c:734:1: error: insn does not satisfy its constraints: (insn 348 127 129 8 (set (reg:SI 2 r2 [271]) (minus:SI (const_int 10 [0xa]) (const_int -336820015 [0xffffffffebec88d1]))) ../runtime/safe_math.h:440 29 {*arm_subsi3_insn} (nil)) crash2.c:764:1: error: unrecognizable insn: (insn 1206 364 368 27 (set (reg:SI 3 r3 [534]) (neg:SI (const_int -1871828801 [0xffffffff906e28bf]))) ../runtime/safe_math.h:440 -1 (nil)) crash3.c: In function 'func_93': crash3.c:1069:1: internal compiler error: in find_valid_class, at reload.c:710 -- Michael _______________________________________________ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-toolchain
