xref: /llvm-project/llvm/test/Transforms/DeadStoreElimination/no-targetdata.ll (revision f497a00da968b0ff90d8c98caa184d14b9a92495) 
1; RUN: opt -passes=dse -S < %s | FileCheck %s
2
3declare void @llvm.memcpy.p0.p0.i64(ptr nocapture, ptr nocapture, i64, i1) nounwind
4
5define void @fn(ptr nocapture %buf) #0 {
6entry:
7
8; We would not eliminate the first memcpy with data layout, and we should not
9; eliminate it without data layout.
10; CHECK-LABEL: @fn
11; CHECK: tail call void @llvm.memcpy.p0.p0.i64
12; CHECK: tail call void @llvm.memcpy.p0.p0.i64
13; CHECK: ret void
14
15  %arrayidx = getelementptr i8, ptr %buf, i64 18
16  tail call void @llvm.memcpy.p0.p0.i64(ptr %arrayidx, ptr %buf, i64 18, i1 false)
17  store i8 1, ptr %arrayidx, align 1
18  tail call void @llvm.memcpy.p0.p0.i64(ptr %buf, ptr %arrayidx, i64 18, i1 false)
19  ret void
20}
21
22