1; RUN: llc -mcpu=pwr7 < %s | FileCheck %s 2target datalayout = "E-m:e-p:32:32-i64:64-n32" 3target triple = "powerpc-unknown-linux-gnu" 4 5; This code would cause code generation like this after PPCCTRLoops ran: 6; %indvar = phi i32 [ 0, %for.body ], [ %indvar.next, %if.then6 ] 7; %j.1.ph13 = phi i32 [ %j.110, %if.then6 ], [ 0, %for.body ], [ 0, %for.body ] 8; %c.0.ph12 = phi i32 [ %dec, %if.then6 ], [ %2, %for.body ], [ %2, %for.body ] 9; which would fail verification because the created induction variable does not 10; have as many predecessor entries as the other PHIs. 11; CHECK-LABEL: @fn1 12; CHECK: mtctr 13 14%struct.anon = type { i32 } 15%struct.anon.0 = type { i32 } 16 17@b = common global %struct.anon* null, align 4 18@a = common global %struct.anon.0* null, align 4 19 20; Function Attrs: nounwind readonly uwtable 21define i32 @fn1() #0 { 22entry: 23 %0 = load %struct.anon*, %struct.anon** @b, align 4 24 %1 = ptrtoint %struct.anon* %0 to i32 25 %cmp = icmp sgt %struct.anon* %0, null 26 %2 = load %struct.anon.0*, %struct.anon.0** @a, align 4 27 br i1 %cmp, label %for.bodythread-pre-split, label %if.end8 28 29for.bodythread-pre-split: ; preds = %entry 30 %aclass = getelementptr inbounds %struct.anon.0, %struct.anon.0* %2, i32 0, i32 0 31 %.pr = load i32, i32* %aclass, align 4 32 br label %for.body 33 34for.body: ; preds = %for.bodythread-pre-split, %for.body 35 switch i32 %.pr, label %for.body [ 36 i32 0, label %while.body.lr.ph.preheader 37 i32 2, label %while.body.lr.ph.preheader 38 ] 39 40while.body.lr.ph.preheader: ; preds = %for.body, %for.body 41 br label %while.body.lr.ph 42 43while.body.lr.ph: ; preds = %while.body.lr.ph.preheader, %if.then6 44 %j.1.ph13 = phi i32 [ %j.110.lcssa, %if.then6 ], [ 0, %while.body.lr.ph.preheader ] 45 %c.0.ph12 = phi i32 [ %dec, %if.then6 ], [ %1, %while.body.lr.ph.preheader ] 46 br label %while.body 47 48while.cond: ; preds = %while.body 49 %cmp2 = icmp slt i32 %inc7, %c.0.ph12 50 br i1 %cmp2, label %while.body, label %if.end8.loopexit 51 52while.body: ; preds = %while.body.lr.ph, %while.cond 53 %j.110 = phi i32 [ %j.1.ph13, %while.body.lr.ph ], [ %inc7, %while.cond ] 54 %aclass_index = getelementptr inbounds %struct.anon, %struct.anon* %0, i32 %j.110, i32 0 55 %3 = load i32, i32* %aclass_index, align 4 56 %aclass5 = getelementptr inbounds %struct.anon.0, %struct.anon.0* %2, i32 %3, i32 0 57 %4 = load i32, i32* %aclass5, align 4 58 %tobool = icmp eq i32 %4, 0 59 %inc7 = add nsw i32 %j.110, 1 60 br i1 %tobool, label %while.cond, label %if.then6 61 62if.then6: ; preds = %while.body 63 %j.110.lcssa = phi i32 [ %j.110, %while.body ] 64 %dec = add nsw i32 %c.0.ph12, -1 65 %cmp29 = icmp slt i32 %j.110.lcssa, %dec 66 br i1 %cmp29, label %while.body.lr.ph, label %if.end8.loopexit17 67 68if.end8.loopexit: ; preds = %while.cond 69 br label %if.end8 70 71if.end8.loopexit17: ; preds = %if.then6 72 br label %if.end8 73 74if.end8: ; preds = %if.end8.loopexit17, %if.end8.loopexit, %entry 75 ret i32 undef 76} 77 78attributes #0 = { nounwind readonly uwtable } 79 80