| ; 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 | |
| } |