1 ; RUN: opt -basicaa -hexagon-loop-idiom -S -mtriple hexagon-unknown-elf < %s \ 2 ; RUN: | FileCheck %s 3 4 define void @PR14241(i32* %s, i64 %size) #0 { 5 ; Ensure that we don't form a memcpy for strided loops. Briefly, when we taught 6 ; LoopIdiom about memmove and strided loops, this got miscompiled into a memcpy 7 ; instead of a memmove. If we get the memmove transform back, this will catch 8 ; regressions. 9 ; 10 ; CHECK-LABEL: @PR14241( 11 12 entry: 13 %end.idx = add i64 %size, -1 14 %end.ptr = getelementptr inbounds i32, i32* %s, i64 %end.idx 15 br label %while.body 16 ; CHECK-NOT: memcpy 17 ; CHECK: memmove 18 19 while.body: 20 %phi.ptr = phi i32* [ %s, %entry ], [ %next.ptr, %while.body ] 21 %src.ptr = getelementptr inbounds i32, i32* %phi.ptr, i64 1 22 %val = load i32, i32* %src.ptr, align 4 23 ; CHECK: load 24 %dst.ptr = getelementptr inbounds i32, i32* %phi.ptr, i64 0 25 store i32 %val, i32* %dst.ptr, align 4 26 ; CHECK: store 27 %next.ptr = getelementptr inbounds i32, i32* %phi.ptr, i64 1 28 %cmp = icmp eq i32* %next.ptr, %end.ptr 29 br i1 %cmp, label %exit, label %while.body 30 31 exit: 32 ret void 33 ; CHECK: ret void 34 } 35 36 attributes #0 = { nounwind } 37
