| ; 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 |
| } |
