https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123022
--- Comment #5 from Sujay Kothadiya <skothadiya at whileone dot in> --- I am posting the verbose output again in a clearer format to avoid confusion. A miscompile is observed because the outputs do not match. Try with -O3 # Compile for riscv64 /mnt/data1/sujayk/CIFUZZR/riscv-gnu-toolchain-build/bin/riscv64-unknown-linux-gnu-gcc -march=rv64gcv_zvl512b -mrvv-vector-bits=zvl -O3 red.c -o user-config.out -fsigned-char -fno-strict-aliasing -fwrapv -Wno-unknown-warning-option -Werror -Wfatal-errors -Wall -Wformat -Wno-int-in-bool-context -Wno-dangling-pointer -Wno-compare-distinct-pointer-types -Wno-overflow -Wuninitialized -Warray-bounds -Wreturn-type -Wno-unused-function -Wno-unused-variable -Wno-unused-but-set-variable -Wno-unused-value -Wno-address -Wno-bool-compare -Wno-pointer-sign -Wno-bool-operation -Wno-tautological-compare -Wno-self-assign -Wno-implicit-const-int-float-conversion -Wno-constant-conversion -Wno-unused-value -Wno-tautological-constant-out-of-range-compare -Wno-constant-logical-operand -Wno-parentheses-equality -Wno-pointer-sign # Compile for x86_64 gcc -O1 red.c -o native.out -fno-strict-aliasing -fwrapv -w # Run on riscv64 via QEMU QEMU_CPU=rv64,vlen=512,rvv_ta_all_1s=true,rvv_ma_all_1s=true,v=true,vext_spec=v1.0,zve32f=true,zve64f=true timeout --verbose -k 0.1 4 /mnt/data1/sujayk/CIFUZZR/riscv-gnu-toolchain-build/bin/qemu-riscv64 user-config.out 1 OUTPUT: 18446744073709551615 # Run natively on x86_64 timeout --verbose -k 0.1 1 ./native.out 1 OUTPUT: 3326195747
