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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=loop-deletion -verify-dom-info -S | FileCheck %s
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64"
; loop1 contains an irreducible cycle, which may loop infinitely. Do not remove
; the loop.
define void @irreducible_subloop_no_mustprogress(i1 %c1, i1 %c2, i1 %c3) {
; CHECK-LABEL: @irreducible_subloop_no_mustprogress(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP1:%.*]]
; CHECK: loop1:
; CHECK-NEXT: br i1 [[C1:%.*]], label [[LOOP1_BB1:%.*]], label [[IRR_BB1:%.*]]
; CHECK: loop1.bb1:
; CHECK-NEXT: br label [[IRR_BB2:%.*]]
; CHECK: irr.bb1:
; CHECK-NEXT: br i1 [[C2:%.*]], label [[LOOP1_LATCH:%.*]], label [[IRR_BB2]]
; CHECK: irr.bb2:
; CHECK-NEXT: br i1 [[C3:%.*]], label [[LOOP1_LATCH]], label [[IRR_BB1]]
; CHECK: loop1.latch:
; CHECK-NEXT: br label [[EXIT:%.*]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
entry:
br label %loop1
loop1:
br i1 %c1, label %loop1.bb1, label %irr.bb1
loop1.bb1:
br label %irr.bb2
irr.bb1:
br i1 %c2, label %loop1.latch, label %irr.bb2
irr.bb2:
br i1 %c3, label %loop1.latch, label %irr.bb1
loop1.latch:
br i1 false, label %loop1, label %exit
exit:
ret void
}
define void @irreducible_subloop_with_mustprogress(i1 %c1, i1 %c2, i1 %c3) mustprogress {
; CHECK-LABEL: @irreducible_subloop_with_mustprogress(
; CHECK-NEXT: br label [[EXIT:%.*]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
br label %loop1
loop1:
br i1 %c1, label %loop1.bb1, label %irr.bb1
loop1.bb1:
br label %irr.bb2
irr.bb1:
br i1 %c2, label %loop1.latch, label %irr.bb2
irr.bb2:
br i1 %c3, label %loop1.latch, label %irr.bb1
loop1.latch:
br i1 false, label %loop1, label %exit
exit:
ret void
}
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