llvm/llvm/test/Analysis/ScalarEvolution/trip-count8.ll

; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py
; RUN: opt < %s -disable-output "-passes=print<scalar-evolution>" -scalar-evolution-classify-expressions=0 2>&1 | FileCheck %s
; PR4599

target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"

define i32 @foo(i32 %ecx) nounwind {
; CHECK-LABEL: 'foo'
; CHECK-NEXT:  Determining loop execution counts for: @foo
; CHECK-NEXT:  Loop %for.body: backedge-taken count is (-1 + %ecx)
; CHECK-NEXT:  Loop %for.body: constant max backedge-taken count is i32 -2
; CHECK-NEXT:  Loop %for.body: symbolic max backedge-taken count is (-1 + %ecx)
; CHECK-NEXT:  Loop %for.body: Trip multiple is 1
;
entry:
  %cmp2 = icmp eq i32 %ecx, 0		; <i1> [#uses=1]
  br i1 %cmp2, label %for.end, label %bb.nph

for.cond:		; preds = %for.inc
  %cmp = icmp ult i32 %inc, %ecx		; <i1> [#uses=1]
  br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge

for.cond.for.end_crit_edge:		; preds = %for.cond
  %phitmp = add i32 %i.01, 2		; <i32> [#uses=1]
  br label %for.end

bb.nph:		; preds = %entry
  br label %for.body

for.body:		; preds = %bb.nph, %for.cond
  %i.01 = phi i32 [ %inc, %for.cond ], [ 0, %bb.nph ]		; <i32> [#uses=3]
  %call = call i32 @bar(i32 %i.01) nounwind		; <i32> [#uses=0]
  br label %for.inc

for.inc:		; preds = %for.body
  %inc = add i32 %i.01, 1		; <i32> [#uses=2]
  br label %for.cond

for.end:		; preds = %for.cond.for.end_crit_edge, %entry
  %i.0.lcssa = phi i32 [ %phitmp, %for.cond.for.end_crit_edge ], [ 1, %entry ]		; <i32> [#uses=1]
  ret i32 %i.0.lcssa
}

declare i32 @bar(i32)