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[Fuzzlyn] Incorrect T1 behavior around division #116125
// Generated by Fuzzlyn v3.1 on 2025-05-29 20:01:16// Run on X64 Windows// Seed: 14412340127944514498-vectort,vector128,vector256,x86aes,x86avx,x86avx2,x86avx512bw,x86avx512bwvl,x86avx512cd,x86avx512cdvl,x86avx512dq,x86avx512dqvl,x86avx512f,x86avx512fvl,x86avx512fx64,x86bmi1,x86bmi1x64,x86bmi2,x86bmi2x64,x86fma,x86lzcnt,x86lzcntx64,x86pclmulqdq,x86popcnt,x86popcntx64,x86sse,x86ssex64,x86sse2,x86sse2x64,x86sse3,x86sse41,x86sse41x64,x86sse42,x86sse42x64,x86ssse3,x86x86base// Reduced from 53.8 KiB to 0.7 KiB in 00:02:59// Debug: Prints 1 line(s)// Release: Prints 0 line(s)usingSystem;usingSystem.Numerics;usingSystem.Runtime.Intrinsics;usingSystem.Runtime.Intrinsics.X86;publicclassC0{publicushortF0;}publicstructS0{publicVector256<int>F0;}publicclassC1{publicC0F0;publicC1(C0f0){F0=f0;}}publicclassProgram{publicstaticvoidMain(){varvr1=newC1(newC0());M3(vr1);}publicstaticvoidM3(C1argThis){if(0>=(Bmi2.X64.ZeroHighBits(0,0)/((0UL&argThis.F0.F0)|1))){S0[]var1=newS0[]{newS0()};System.Console.WriteLine(var1[0].F0);}}}
changed the title [-][Fuzzlyn] Incorrect T1 behavior around Bmi2.X64.ZeroHighBits and division[/-][+][Fuzzlyn] Incorrect T1 behavior around division[/+]on May 31, 2025
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dotnet-policy-service commentedon May 30, 2025
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EgorBo commentedon May 30, 2025
Doesn't look to be Bmi2 specific, reproduces on:
[-][Fuzzlyn] Incorrect T1 behavior around Bmi2.X64.ZeroHighBits and division[/-][+][Fuzzlyn] Incorrect T1 behavior around division[/+]