1; RUN: opt < %s -passes=instcombine | llvm-dis 2 3@X = global i8 0 4@Y = global i8 12 5 6declare void @llvm.memmove.p0.p0.i32(ptr, ptr, i32, i1) 7 8declare void @llvm.memcpy.p0.p0.i32(ptr, ptr, i32, i1) 9 10declare void @llvm.memset.p0.i32(ptr, i8, i32, i1) 11 12define void @zero_byte_test() { 13 ; These process zero bytes, so they are a noop. 14 call void @llvm.memmove.p0.p0.i32(ptr @X, ptr @Y, i32 0, i1 false ) 15 call void @llvm.memcpy.p0.p0.i32(ptr @X, ptr @Y, i32 0, i1 false ) 16 call void @llvm.memset.p0.i32(ptr @X, i8 123, i32 0, i1 false ) 17 ret void 18} 19 20