Regression Test issue when building SimEng : "fcvtzu" ARM instruction

[elfmath]

Goals

As a end-user of SimEng, I wish to build SimEng and pass regression tests before installing it. So that I can trust my installation

Issue

Regression test for "fcvtzu" instruction failed for emulation simulatio-mode.
Failing tests link to Issue #367

From LastTest.log trace file :

[  FAILED  ] AArch64/InstFloat.fcvtzu/emulation, where GetParam() = (0, "{}")

When looking in the file we have this failure for the test above :

...../SimEng/test/regression/aarch64/instructions/float.cc:615: Failure
Expected equality of these values:
  (getGeneralRegister<uint64_t>(9))
    Which is: 0
  (18446744073709551615UL)
    Which is: 18446744073709551615

Investigation Leads

Reproduction

Try to build SimEng with :

• State of the git : tag 0.9.6
• cmake version 3.21.4
• gcc 7.5.0
• LLVM precompiled version 14.0.5
• Commands to compile and run test before installation :

mkdir -p $SIMENG_BUILD_DIR
cmake -B $SIMENG_BUILD_DIR -S $SIMENG_SRC_DIR -DCMAKE_BUILD_TYPE=Debug -DCMAKE_INSTALL_PREFIX=$SIMENG_HOME -DSIMENG_ENABLE_TESTS=ON -DSIMENG_USE_EXTERNAL_LLVM=ON -DLLVM_DIR=$LLVM_DIR
cmake --build $SIMENG_BUILD_DIR -j{nproc}
cmake --build $SIMENG_BUILD_DIR --target test

[dANW34V3R]

Potentially this has been fixed in the upcoming warnings PR #408. I will see if this fixes it on CentOS 7 as you mentioned this as your environment in #403.