| ; RUN: opt -passes=indvars -S < %s | FileCheck %s |
| |
| target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" |
| |
| ; indvars will try to replace %b.0.lcssa with %t.1. If it does this, |
| ; it will break LCSSA. |
| |
| @c = external global i32, align 4 |
| |
| ; CHECK-LABEL: @fn1 |
| define void @fn1(i1 %arg) { |
| entry: |
| br label %for.body |
| |
| for.cond1.preheader: ; preds = %for.body |
| %0 = load i32, ptr @c, align 4 |
| br i1 %arg, label %for.cond1.us.preheader, label %for.cond1 |
| |
| for.cond1.us.preheader: ; preds = %for.cond1.preheader |
| br label %for.cond1.us |
| |
| for.cond1.us: ; preds = %for.cond1.us, %for.cond1.us.preheader |
| br label %for.cond1.us |
| |
| for.body: ; preds = %for.body, %entry |
| br i1 %arg, label %for.body, label %for.cond1.preheader |
| |
| for.cond1: ; preds = %for.cond1.preheader |
| br i1 true, label %for.body9.lr.ph, label %for.cond13.preheader |
| |
| for.body9.lr.ph: ; preds = %for.cond1 |
| br i1 %arg, label %for.body9.us.preheader, label %for.body9 |
| |
| for.body9.us.preheader: ; preds = %for.body9.lr.ph |
| br label %for.body9.us |
| |
| for.body9.us: ; preds = %for.body9.us, %for.body9.us.preheader |
| br label %for.body9.us |
| |
| for.cond13.preheader: ; preds = %for.body9, %for.cond1 |
| %b.0.lcssa = phi i32 [ %0, %for.body9 ], [ 0, %for.cond1 ] |
| br label %for.cond13 |
| |
| for.body9: ; preds = %for.body9.lr.ph |
| br label %for.cond13.preheader |
| |
| for.cond13: ; preds = %for.cond13, %for.cond13.preheader |
| %d.1 = phi i32 [ %t.1, %for.cond13 ], [ %0, %for.cond13.preheader ] |
| %t.1 = phi i32 [ %b.0.lcssa, %for.cond13 ], [ %0, %for.cond13.preheader ] |
| br i1 %arg, label %for.cond18.preheader, label %for.cond13 |
| |
| for.cond18.preheader: ; preds = %for.cond13 |
| br label %for.cond18 |
| |
| for.cond18: ; preds = %for.cond18, %for.cond18.preheader |
| %b.1 = phi i32 [ %xor, %for.cond18 ], [ %b.0.lcssa, %for.cond18.preheader ] |
| %add = add nsw i32 %b.1, %d.1 |
| %xor = xor i32 %add, %b.1 |
| br label %for.cond18 |
| } |
