2 ; RUN: opt < %s -S -debug-only=loop-unroll -passes=loop-unroll -unroll-runtime 2>&1 | FileCheck %s
3 ; RUN: opt < %s -S -debug-only=loop-unroll -passes='require<profile-summary>,function(require<opt-remark-emit>,loop-unroll)' 2>&1 | FileCheck %s
5 ; Regression test for setting the correct idom for exit blocks.
7 ; CHECK: Loop Unroll: F[basic]
8 ; CHECK: PEELING loop %for.body with iteration count 2!
10 define i32 @basic(ptr %p, i32 %k, i1 %c1, i1 %c2) #0 !prof !3 {
12 %cmp3 = icmp slt i32 0, %k
13 br i1 %cmp3, label %for.body.lr.ph, label %for.end
15 for.body.lr.ph: ; preds = %entry
18 for.body: ; preds = %for.body.lr.ph, %for.body
19 %i.05 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %latch ]
20 %p.addr.04 = phi ptr [ %p, %for.body.lr.ph ], [ %incdec.ptr, %latch ]
21 %incdec.ptr = getelementptr inbounds i32, ptr %p.addr.04, i32 1
22 store i32 %i.05, ptr %p.addr.04, align 4
23 %inc = add nsw i32 %i.05, 1
24 %cmp = icmp slt i32 %inc, %k
25 br i1 %c1, label %continue, label %to_side_exit
28 br i1 %c2, label %latch, label %side_exit, !prof !2
31 br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge, !prof !1
33 for.cond.for.end_crit_edge: ; preds = %for.body
37 br i1 %c2, label %continue, label %side_exit, !prof !2
40 for.end: ; preds = %for.cond.for.end_crit_edge, %entry
41 %res = phi i32 [ 0, %entry ], [ %inc, %for.cond.for.end_crit_edge ]
45 %rval = call i32(...) @llvm.experimental.deoptimize.i32() [ "deopt"(i32 %inc) ]
49 declare i32 @llvm.experimental.deoptimize.i32(...)
51 attributes #0 = { nounwind }
53 !1 = !{!"branch_weights", i32 1, i32 1}
54 !2 = !{!"branch_weights", i32 1, i32 0}
55 !3 = !{!"function_entry_count", i64 1}