1; REQUIRES: asserts 2; RUN: opt < %s -S -debug-only=loop-unroll -loop-unroll -unroll-runtime -unroll-peel-multi-deopt-exit 2>&1 | FileCheck %s 3; RUN: opt < %s -S -debug-only=loop-unroll -unroll-peel-multi-deopt-exit -passes='require<profile-summary>,function(require<opt-remark-emit>,loop-unroll)' 2>&1 | FileCheck %s 4 5; Regression test for setting the correct idom for exit blocks. 6 7; CHECK: Loop Unroll: F[basic] 8; CHECK: PEELING loop %for.body with iteration count 2! 9 10define i32 @basic(i32* %p, i32 %k, i1 %c1, i1 %c2) #0 !prof !3 { 11entry: 12 %cmp3 = icmp slt i32 0, %k 13 br i1 %cmp3, label %for.body.lr.ph, label %for.end 14 15for.body.lr.ph: ; preds = %entry 16 br label %for.body 17 18for.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 i32* [ %p, %for.body.lr.ph ], [ %incdec.ptr, %latch ] 21 %incdec.ptr = getelementptr inbounds i32, i32* %p.addr.04, i32 1 22 store i32 %i.05, i32* %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 26 27continue: 28 br i1 %c2, label %latch, label %side_exit, !prof !2 29 30latch: 31 br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge, !prof !1 32 33for.cond.for.end_crit_edge: ; preds = %for.body 34 br label %for.end 35 36to_side_exit: 37 br i1 %c2, label %continue, label %side_exit, !prof !2 38 39 40for.end: ; preds = %for.cond.for.end_crit_edge, %entry 41 %res = phi i32 [ 0, %entry ], [ %inc, %for.cond.for.end_crit_edge ] 42 ret i32 %res 43 44side_exit: 45 %rval = call i32(...) @llvm.experimental.deoptimize.i32() [ "deopt"(i32 %inc) ] 46 ret i32 %rval 47} 48 49declare i32 @llvm.experimental.deoptimize.i32(...) 50 51attributes #0 = { nounwind } 52 53!1 = !{!"branch_weights", i32 1, i32 1} 54!2 = !{!"branch_weights", i32 1, i32 0} 55!3 = !{!"function_entry_count", i64 1} 56