1 ; RUN: opt -indvars -S < %s | FileCheck %s 2 3 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 4 5 ; indvars will try to replace %b.0.lcssa with %t.1. If it does this, 6 ; it will break LCSSA. 7 8 @c = external global i32, align 4 9 10 ; CHECK-LABEL: @fn1 11 define void @fn1() { 12 entry: 13 br label %for.body 14 15 for.cond1.preheader: ; preds = %for.body 16 %0 = load i32, i32* @c, align 4 17 br i1 undef, label %for.cond1.us.preheader, label %for.cond1 18 19 for.cond1.us.preheader: ; preds = %for.cond1.preheader 20 br label %for.cond1.us 21 22 for.cond1.us: ; preds = %for.cond1.us, %for.cond1.us.preheader 23 br label %for.cond1.us 24 25 for.body: ; preds = %for.body, %entry 26 br i1 undef, label %for.body, label %for.cond1.preheader 27 28 for.cond1: ; preds = %for.cond1.preheader 29 br i1 true, label %for.body9.lr.ph, label %for.cond13.preheader 30 31 for.body9.lr.ph: ; preds = %for.cond1 32 br i1 undef, label %for.body9.us.preheader, label %for.body9 33 34 for.body9.us.preheader: ; preds = %for.body9.lr.ph 35 br label %for.body9.us 36 37 for.body9.us: ; preds = %for.body9.us, %for.body9.us.preheader 38 br label %for.body9.us 39 40 for.cond13.preheader: ; preds = %for.body9, %for.cond1 41 %b.0.lcssa = phi i32 [ %0, %for.body9 ], [ 0, %for.cond1 ] 42 br label %for.cond13 43 44 for.body9: ; preds = %for.body9.lr.ph 45 br label %for.cond13.preheader 46 47 for.cond13: ; preds = %for.cond13, %for.cond13.preheader 48 %d.1 = phi i32 [ %t.1, %for.cond13 ], [ %0, %for.cond13.preheader ] 49 %t.1 = phi i32 [ %b.0.lcssa, %for.cond13 ], [ %0, %for.cond13.preheader ] 50 br i1 undef, label %for.cond18.preheader, label %for.cond13 51 52 for.cond18.preheader: ; preds = %for.cond13 53 br label %for.cond18 54 55 for.cond18: ; preds = %for.cond18, %for.cond18.preheader 56 %b.1 = phi i32 [ %xor, %for.cond18 ], [ %b.0.lcssa, %for.cond18.preheader ] 57 %add = add nsw i32 %b.1, %d.1 58 %xor = xor i32 %add, %b.1 59 br label %for.cond18 60 } 61
