| ; RUN: opt -loop-reduce -S < %s | FileCheck %s |
| ; |
| ; PR11571: handle a postinc user outside of for.body7 that requires |
| ; recursive expansion of a quadratic recurrence within for.body7. LSR |
| ; needs to forget that for.body7 is a postinc loop during expansion. |
| |
| target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32-n8:16:32-S128" |
| target triple = "i386-unknown-freebsd10.0" |
| |
| @b = external global [121 x i32] |
| |
| ; CHECK: @vb |
| ; Outer recurrence: |
| ; CHECK: %lsr.iv1 = phi [121 x i32]* |
| ; Inner recurrence: |
| ; CHECK: %lsr.iv = phi i32 |
| ; Outer step (relative to inner recurrence): |
| ; CHECK: %scevgep = getelementptr i1* %{{.*}}, i32 %lsr.iv |
| ; Outer use: |
| ; CHECK: %lsr.iv3 = phi [121 x i32]* [ %lsr.iv1, %for.body43.preheader ] |
| define void @vb() nounwind { |
| for.cond.preheader: |
| br label %for.body7 |
| |
| for.body7: |
| %indvars.iv77 = phi i32 [ %indvars.iv.next78, %for.body7 ], [ 1, %for.cond.preheader ] |
| %bf.072 = phi i32 [ %t1, %for.body7 ], [ 0, %for.cond.preheader ] |
| %t1 = add i32 %bf.072, %indvars.iv77 |
| %indvars.iv.next78 = add i32 %indvars.iv77, 1 |
| br i1 undef, label %for.body43, label %for.body7 |
| |
| for.body43: |
| %bf.459 = phi i32 [ %inc44, %for.body43 ], [ %t1, %for.body7 ] |
| %inc44 = add nsw i32 %bf.459, 1 |
| %arrayidx45 = getelementptr inbounds [121 x i32]* @b, i32 0, i32 %bf.459 |
| %t2 = load i32* %arrayidx45, align 4 |
| br label %for.body43 |
| } |
| |
