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; REQUIRES: asserts
; RUN: opt < %s -S -debug-only=loop-unroll -loop-unroll -unroll-runtime -unroll-peel-multi-deopt-exit 2>&1 | FileCheck %s
; 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
; Regression test for setting the correct idom for exit blocks.
; CHECK: Loop Unroll: F[basic]
; CHECK: PEELING loop %for.body with iteration count 2!
define i32 @basic(i32* %p, i32 %k, i1 %c1, i1 %c2) #0 !prof !3 {
entry:
%cmp3 = icmp slt i32 0, %k
br i1 %cmp3, label %for.body.lr.ph, label %for.end
for.body.lr.ph: ; preds = %entry
br label %for.body
for.body: ; preds = %for.body.lr.ph, %for.body
%i.05 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %latch ]
%p.addr.04 = phi i32* [ %p, %for.body.lr.ph ], [ %incdec.ptr, %latch ]
%incdec.ptr = getelementptr inbounds i32, i32* %p.addr.04, i32 1
store i32 %i.05, i32* %p.addr.04, align 4
%inc = add nsw i32 %i.05, 1
%cmp = icmp slt i32 %inc, %k
br i1 %c1, label %continue, label %to_side_exit
continue:
br i1 %c2, label %latch, label %side_exit, !prof !2
latch:
br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge, !prof !1
for.cond.for.end_crit_edge: ; preds = %for.body
br label %for.end
to_side_exit:
br i1 %c2, label %continue, label %side_exit, !prof !2
for.end: ; preds = %for.cond.for.end_crit_edge, %entry
%res = phi i32 [ 0, %entry ], [ %inc, %for.cond.for.end_crit_edge ]
ret i32 %res
side_exit:
%rval = call i32(...) @llvm.experimental.deoptimize.i32() [ "deopt"(i32 %inc) ]
ret i32 %rval
}
declare i32 @llvm.experimental.deoptimize.i32(...)
attributes #0 = { nounwind }
!1 = !{!"branch_weights", i32 1, i32 1}
!2 = !{!"branch_weights", i32 1, i32 0}
!3 = !{!"function_entry_count", i64 1}
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