[Bug ipa/115533] [12/13/14/15 regression] flac miscompiled with -O3 -march=znver2 -fipa-pta -fno-vect-cost-model since r12-3893-g6390c5047adb75

[sjames at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115533

Sam James <sjames at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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  Attachment #58481|0                           |1
        is obsolete|                            |

--- Comment #15 from Sam James <sjames at gcc dot gnu.org> ---
Created attachment 58484
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=58484&action=edit
test.c

iains & pinskia helped, now using fabs(...) < e (error is large though because
of all the accumulated multiplication error terms..)