Test source: git
Comments: LLVM bug: load widening of i8 -> i64
Source: <stdin> ---------------------------------------- define i32 @bcmp8(ptr nocapture nowrite %x, ptr nocapture nowrite %y) denormal-fp-math=ieee,ieee { %0: %call = call i32 @bcmp(nocapture ptr nocapture nowrite %x, nocapture ptr nocapture nowrite %y, i64 8) denormal-fp-math=ieee,ieee ret i32 %call } => define i32 @bcmp8(ptr nocapture nowrite %x, ptr nocapture nowrite %y) denormal-fp-math=ieee,ieee { %0: %1 = bitcast ptr nocapture nowrite %x to ptr %2 = bitcast ptr nocapture nowrite %y to ptr %3 = load i64, ptr %1, align 1 %4 = load i64, ptr %2, align 1 %5 = icmp ne i64 %3, %4 %6 = zext i1 %5 to i32 ret i32 %6 } Transformation doesn't verify! ERROR: Source is more defined than target Example: ptr nocapture nowrite %x = poison ptr nocapture nowrite %y = poison Source: i32 %call = poison SOURCE MEMORY STATE =================== NON-LOCAL BLOCKS: Block 0 > size: 0 align: 1 alloc type: 0 Block 1 > align: 2 alloc type: 0 Block 2 > align: 2 alloc type: 0 Block 3 > align: 2 alloc type: 0 Target: ptr %1 = poison ptr %2 = poison i64 %3 = UB triggered! ------------------- SMT STATS ------------------- Num queries: 9 Num invalid: 0 Num skips: 0 Num trivial: 0 (0.0%) Num timeout: 0 (0.0%) Num errors: 0 (0.0%) Num SAT: 9 (100.0%) Num UNSAT: 0 (0.0%) Alive2: Transform doesn't verify; aborting!
+ : 'RUN: at line 2' + /home/nlopes/alive2/build/opt-alive.sh -S -expandmemcmp -memcmp-num-loads-per-block=1 -mtriple=x86_64-unknown-unknown -data-layout=e-m:o-i64:64-f80:128-n8:16:32:64-S128 + /bitbucket/nlopes/llvm/build/bin/FileCheck /bitbucket/nlopes/llvm/llvm/test/Transforms/ExpandMemCmp/X86/bcmp.ll --check-prefix=X64 FileCheck error: '<stdin>' is empty. FileCheck command line: /bitbucket/nlopes/llvm/build/bin/FileCheck /bitbucket/nlopes/llvm/llvm/test/Transforms/ExpandMemCmp/X86/bcmp.ll --check-prefix=X64