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; RUN: opt < %s -indvars -S | FileCheck %s
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
; PR25372
; We can compute the expression of %phi0 and that is a SCEV
; constant. However, instcombine can't deduce this, so we can
; potentially end up trying to handle a constant when replacing
; congruent IVs.
; CHECK-LABEL: crash
define void @crash() {
entry:
br i1 false, label %not_taken, label %pre
not_taken:
br label %pre
pre:
; %phi0.pre and %phi1.pre are evaluated by SCEV to constant 0.
%phi0.pre = phi i32 [ 0, %entry ], [ 2, %not_taken ]
%phi1.pre = phi i32 [ 0, %entry ], [ 1, %not_taken ]
br label %loop
loop:
; %phi0 and %phi1 are evaluated by SCEV to constant 0.
%phi0 = phi i32 [ 0, %loop ], [ %phi0.pre, %pre ]
%phi1 = phi i32 [ 0, %loop ], [ %phi1.pre, %pre ]
br i1 undef, label %exit, label %loop
exit:
ret void
}
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