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- ; RUN: opt -basicaa -dse -S < %s | FileCheck %s
- declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind
- define void @fn(i8* nocapture %buf) #0 {
- entry:
- ; We would not eliminate the first memcpy with data layout, and we should not
- ; eliminate it without data layout.
- ; CHECK-LABEL: @fn
- ; CHECK: tail call void @llvm.memcpy.p0i8.p0i8.i64
- ; CHECK: tail call void @llvm.memcpy.p0i8.p0i8.i64
- ; CHECK: ret void
- %arrayidx = getelementptr i8, i8* %buf, i64 18
- tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %arrayidx, i8* %buf, i64 18, i32 1, i1 false)
- store i8 1, i8* %arrayidx, align 1
- tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %buf, i8* %arrayidx, i64 18, i32 1, i1 false)
- ret void
- }
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