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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -indvars -S | FileCheck %s

define void @test1() nounwind {
; CHECK-LABEL: @test1(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[BB:%.*]]
; CHECK:       bb:
; CHECK-NEXT:    [[IV_INT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[DOTINT:%.*]], [[BB]] ]
; CHECK-NEXT:    [[INDVAR_CONV:%.*]] = sitofp i32 [[IV_INT]] to double
; CHECK-NEXT:    [[TMP0:%.*]] = tail call i32 @foo(double [[INDVAR_CONV]]) #0
; CHECK-NEXT:    [[DOTINT]] = add nuw nsw i32 [[IV_INT]], 1
; CHECK-NEXT:    [[TMP1:%.*]] = icmp ult i32 [[DOTINT]], 10000
; CHECK-NEXT:    br i1 [[TMP1]], label [[BB]], label [[RETURN:%.*]]
; CHECK:       return:
; CHECK-NEXT:    ret void
;
entry:
  br label %bb

bb:		; preds = %bb, %entry
  %iv = phi double [ 0.000000e+00, %entry ], [ %1, %bb ]
  %0 = tail call i32 @foo(double %iv) nounwind
  %1 = fadd double %iv, 1.000000e+00
  %2 = fcmp olt double %1, 1.000000e+04
  br i1 %2, label %bb, label %return

return:		; preds = %bb
  ret void
}

declare i32 @foo(double)

define void @test2() nounwind {
; CHECK-LABEL: @test2(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[BB:%.*]]
; CHECK:       bb:
; CHECK-NEXT:    [[IV_INT:%.*]] = phi i32 [ -10, [[ENTRY:%.*]] ], [ [[DOTINT:%.*]], [[BB]] ]
; CHECK-NEXT:    [[INDVAR_CONV:%.*]] = sitofp i32 [[IV_INT]] to double
; CHECK-NEXT:    [[TMP0:%.*]] = tail call i32 @foo(double [[INDVAR_CONV]]) #0
; CHECK-NEXT:    [[DOTINT]] = add nsw i32 [[IV_INT]], 2
; CHECK-NEXT:    [[TMP1:%.*]] = icmp slt i32 [[DOTINT]], -1
; CHECK-NEXT:    br i1 [[TMP1]], label [[BB]], label [[RETURN:%.*]]
; CHECK:       return:
; CHECK-NEXT:    ret void
;
entry:
  br label %bb

bb:		; preds = %bb, %entry
  %iv = phi double [ -10.000000e+00, %entry ], [ %1, %bb ]
  %0 = tail call i32 @foo(double %iv) nounwind
  %1 = fadd double %iv, 2.000000e+00
  %2 = fcmp olt double %1, -1.000000e+00
  br i1 %2, label %bb, label %return

return:		; preds = %bb
  ret void
}


define void @test3() nounwind {
; CHECK-LABEL: @test3(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[BB:%.*]]
; CHECK:       bb:
; CHECK-NEXT:    [[IV:%.*]] = phi double [ 0.000000e+00, [[ENTRY:%.*]] ], [ [[TMP1:%.*]], [[BB]] ]
; CHECK-NEXT:    [[TMP0:%.*]] = tail call i32 @foo(double [[IV]]) #0
; CHECK-NEXT:    [[TMP1]] = fadd double [[IV]], 1.000000e+00
; CHECK-NEXT:    br i1 false, label [[BB]], label [[RETURN:%.*]]
; CHECK:       return:
; CHECK-NEXT:    ret void
;
entry:
  br label %bb

bb:		; preds = %bb, %entry
  %iv = phi double [ 0.000000e+00, %entry ], [ %1, %bb ]
  %0 = tail call i32 @foo(double %iv) nounwind
  %1 = fadd double %iv, 1.000000e+00
  %2 = fcmp olt double %1, -1.000000e+00
  br i1 %2, label %bb, label %return

return:
  ret void
}

define void @test4() nounwind {
; CHECK-LABEL: @test4(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[BB:%.*]]
; CHECK:       bb:
; CHECK-NEXT:    [[IV_INT:%.*]] = phi i32 [ 40, [[ENTRY:%.*]] ], [ [[DOTINT:%.*]], [[BB]] ]
; CHECK-NEXT:    [[INDVAR_CONV:%.*]] = sitofp i32 [[IV_INT]] to double
; CHECK-NEXT:    [[TMP0:%.*]] = tail call i32 @foo(double [[INDVAR_CONV]]) #0
; CHECK-NEXT:    [[DOTINT]] = add nsw i32 [[IV_INT]], -1
; CHECK-NEXT:    br i1 false, label [[BB]], label [[RETURN:%.*]]
; CHECK:       return:
; CHECK-NEXT:    ret void
;
entry:
  br label %bb

bb:		; preds = %bb, %entry
  %iv = phi double [ 40.000000e+00, %entry ], [ %1, %bb ]
  %0 = tail call i32 @foo(double %iv) nounwind
  %1 = fadd double %iv, -1.000000e+00
  %2 = fcmp olt double %1, 1.000000e+00
  br i1 %2, label %bb, label %return

return:
  ret void
}

; PR6761
define void @test5() nounwind {
; <label>:0
; CHECK-LABEL: @test5(
; CHECK-NEXT:    br label [[TMP1:%.*]]
; CHECK:       1:
; CHECK-NEXT:    [[DOTINT:%.*]] = phi i32 [ 9, [[TMP0:%.*]] ], [ [[DOTINT1:%.*]], [[TMP1]] ]
; CHECK-NEXT:    [[TMP2:%.*]] = tail call i32 @foo(double 0.000000e+00)
; CHECK-NEXT:    [[DOTINT1]] = add nsw i32 [[DOTINT]], -1
; CHECK-NEXT:    [[TMP3:%.*]] = icmp slt i32 [[DOTINT1]], 0
; CHECK-NEXT:    br i1 [[TMP3]], label [[EXIT:%.*]], label [[TMP1]]
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
  br label %1

; <label>:1
  %2 = phi double [ 9.000000e+00, %0 ], [ %4, %1 ]
  %3 = tail call i32 @foo(double 0.0)
  %4 = fadd double %2, -1.000000e+00
  %5 = fcmp ult double %4, 0.000000e+00
  br i1 %5, label %exit, label %1

exit:
  ret void
}