1 ; RUN: llc -O2 -march=bpfel -mcpu=v2 -mattr=+alu32 < %s | FileCheck %s
3 ; For the below example, two phi node in the loop may depend on
4 ; each other. So implementation must handle recursion properly.
6 ; int test(unsigned long a, unsigned long b, unsigned long c) {
9 ; #pragma clang loop unroll(disable)
10 ; for (long i = 0; i < 100; i++) {
19 ; return val == 0 ? 1 : 0;
23 define dso_local i32 @test(i64 %a, i64 %b, i64 %c) local_unnamed_addr {
27 for.cond.cleanup: ; preds = %for.body
28 %cmp6 = icmp eq i32 %val.2, 0
29 %cond = zext i1 %cmp6 to i32
32 for.body: ; preds = %for.body, %entry
33 %i.018 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
34 %val.017 = phi i32 [ 0, %entry ], [ %val.2, %for.body ]
35 %a.addr.016 = phi i64 [ %a, %entry ], [ %add, %for.body ]
36 %b.addr.015 = phi i64 [ %b, %entry ], [ %add5, %for.body ]
37 %cmp1 = icmp ugt i64 %a.addr.016, %b.addr.015
38 %add = add i64 %a.addr.016, %b.addr.015
39 %cmp2 = icmp ugt i64 %b.addr.015, %c
40 %0 = or i1 %cmp2, %cmp1
41 %val.2 = select i1 %0, i32 1, i32 %val.017
42 %add5 = add i64 %b.addr.015, %c
43 %inc = add nuw nsw i64 %i.018, 1
44 %exitcond = icmp eq i64 %inc, 100
45 br i1 %exitcond, label %for.cond.cleanup, label %for.body, !llvm.loop !2
47 ; CHECK: [[VAL:r[0-9]+]] = w{{[0-9]+}}
48 ; CHECK-NOT: [[VAL:r[0-9]+]] <<= 32
49 ; CHECK-NOT: [[VAL]] >>= 32
50 ; CHECK: if [[VAL]] == 0 goto
52 !2 = distinct !{!2, !3}
53 !3 = !{!"llvm.loop.unroll.disable"}