gm2 frontend in gcc 14 (fedora 40) bug

[Gerald Kasner]

Hi all,

a quick test with gm2 (GCC) 14.0.1 20240411 (Red Hat 14.0.1-0) gave

wrong results with a simple Gaussian elimination, while older gm2-frontends

(gm2 (GCC) 13.2.1 20240316 (Red Hat 13.2.1-7)) give correct results

test compiled with:

gm2 -O2 -fiso testgauss.mod -lm

Result with version 13.2.1 :

      125.000000000000369482222595252097
    -2880.000000000007275957614183425903
    14490.000000000032741809263825416565
   -24640.000000000047293724492192268372
    13230.000000000023646862246096134186

Result with 14.0.1:

         1.000000000000000000000000000000
        1.500000000000000000000000000000
        1.166666666666666740681534975010
   -24640.000000000047293724492192268372
    13230.000000000023646862246096134186

With  pivoted Gaussian elimination, the first three are NaN's.

Any idea's ???

testgauss.mod is attached here.

Regards, Gerald

testgauss.mod
Description: audio/mod