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; RUN: opt -indvars -S %s -o - | FileCheck %s
; When bailing out in rewriteLoopExitValues() you would be left with a PHI node
; that was not deleted, and the IndVar pass would return an incorrect modified
; status. This was caught by the expensive check introduced in D86589.
; CHECK-LABEL: header:
; CHECK-NEXT: %idx = phi i64 [ %idx.next, %latch ], [ undef, %entry ]
; CHECK-NEXT: %cond = icmp sgt i64 %n, %idx
; CHECK-NEXT: br i1 %cond, label %end, label %inner.preheader
; CHECK-LABEL: latch:
; CHECK-NEXT: %idx.next = add nsw i64 %idx, -1
; CHECK-NEXT: br label %header
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
@ptr = external global i64
define dso_local void @hoge() local_unnamed_addr {
entry: ; preds = %entry
%n = sdiv exact i64 undef, 40
br label %header
header: ; preds = %latch, %entry
%idx = phi i64 [ %idx.next, %latch ], [ undef, %entry ]
%cond = icmp sgt i64 %n, %idx
br i1 %cond, label %end, label %inner
inner: ; preds = %inner, %header
%i = phi i64 [ %i.next, %inner ], [ 0, %header ]
%j = phi i64 [ %j.next, %inner ], [ %n, %header ]
%i.next = add nsw i64 %i, 1
%j.next = add nsw i64 %j, 1
store i64 undef, i64* @ptr
%cond1 = icmp slt i64 %j, %idx
br i1 %cond1, label %inner, label %inner_exit
inner_exit: ; preds = %inner
%indvar = phi i64 [ %i.next, %inner ]
%indvar_use = add i64 %indvar, 1
br label %latch
latch: ; preds = %inner_exit
%idx.next = add nsw i64 %idx, -1
br label %header
end: ; preds = %header
ret void
}
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