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1; RUN: opt -passes=dse -S < %s | FileCheck %s2 3declare void @llvm.memcpy.p0.p0.i64(ptr nocapture, ptr nocapture, i64, i1) nounwind4 5define void @fn(ptr nocapture %buf) #0 {6entry:7 8; We would not eliminate the first memcpy with data layout, and we should not9; eliminate it without data layout.10; CHECK-LABEL: @fn11; CHECK: tail call void @llvm.memcpy.p0.p0.i6412; CHECK: tail call void @llvm.memcpy.p0.p0.i6413; CHECK: ret void14 15 %arrayidx = getelementptr i8, ptr %buf, i64 1816 tail call void @llvm.memcpy.p0.p0.i64(ptr %arrayidx, ptr %buf, i64 18, i1 false)17 store i8 1, ptr %arrayidx, align 118 tail call void @llvm.memcpy.p0.p0.i64(ptr %buf, ptr %arrayidx, i64 18, i1 false)19 ret void20}21 22