1 ; RUN: opt -S < %s -indvars | opt -analyze -iv-users | grep "%cmp = icmp slt i32" | grep "= {%\.ph,+,1}<%for.cond>" 2 ; PR8079 3 4 ; LoopSimplify should invalidate indvars when splitting out the 5 ; inner loop. 6 7 @maxStat = external global i32 8 9 define i32 @test() nounwind { 10 entry: 11 br label %for.cond 12 13 for.cond: ; preds = %if.then5, %if.end, %entry 14 %cuts.1 = phi i32 [ 0, %entry ], [ %inc, %if.then5 ], [ %cuts.1, %if.end ] 15 %0 = phi i32 [ 0, %entry ], [ %add, %if.end ], [ %add, %if.then5 ] 16 %add = add i32 %0, 1 17 %cmp = icmp slt i32 %0, 1 18 %tmp1 = load i32* @maxStat, align 4 19 br i1 %cmp, label %for.body, label %for.cond14.preheader 20 21 for.cond14.preheader: ; preds = %for.cond 22 %cmp1726 = icmp sgt i32 %tmp1, 0 23 br i1 %cmp1726, label %for.body18, label %return 24 25 for.body: ; preds = %for.cond 26 %cmp2 = icmp sgt i32 %tmp1, 100 27 br i1 %cmp2, label %return, label %if.end 28 29 if.end: ; preds = %for.body 30 %cmp4 = icmp sgt i32 %tmp1, -1 31 br i1 %cmp4, label %if.then5, label %for.cond 32 33 if.then5: ; preds = %if.end 34 call void @foo() nounwind 35 %inc = add i32 %cuts.1, 1 36 br label %for.cond 37 38 for.body18: ; preds = %for.body18, %for.cond14.preheader 39 %i13.027 = phi i32 [ %1, %for.body18 ], [ 0, %for.cond14.preheader ] 40 call void @foo() nounwind 41 %1 = add nsw i32 %i13.027, 1 42 %tmp16 = load i32* @maxStat, align 4 43 %cmp17 = icmp slt i32 %1, %tmp16 44 br i1 %cmp17, label %for.body18, label %return 45 46 return: ; preds = %for.body18, %for.body, %for.cond14.preheader 47 ret i32 0 48 } 49 50 declare void @foo() nounwind 51 52 ; Notify SCEV when removing an ExitingBlock. 53 ; CHECK-LABEL: @mergeExit( 54 ; CHECK: while.cond191: 55 ; CHECK: br i1 %or.cond, label %while.body197 56 ; CHECK-NOT: land.rhs: 57 ; CHECK: ret 58 define void @mergeExit(i32 %MapAttrCount) nounwind uwtable ssp { 59 entry: 60 br i1 undef, label %if.then124, label %if.end126 61 62 if.then124: ; preds = %entry 63 unreachable 64 65 if.end126: ; preds = %entry 66 br i1 undef, label %while.body.lr.ph, label %if.end591 67 68 while.body.lr.ph: ; preds = %if.end126 69 br i1 undef, label %if.end140, label %if.then137 70 71 if.then137: ; preds = %while.body.lr.ph 72 unreachable 73 74 if.end140: ; preds = %while.body.lr.ph 75 br i1 undef, label %while.cond191.outer, label %if.then148 76 77 if.then148: ; preds = %if.end140 78 unreachable 79 80 while.cond191.outer: ; preds = %if.then205, %if.end140 81 br label %while.cond191 82 83 while.cond191: ; preds = %while.body197, %while.cond191.outer 84 %CppIndex.0 = phi i32 [ %inc, %while.body197 ], [ undef, %while.cond191.outer ] 85 br i1 undef, label %land.rhs, label %if.then216 86 87 land.rhs: ; preds = %while.cond191 88 %inc = add i32 %CppIndex.0, 1 89 %cmp196 = icmp ult i32 %inc, %MapAttrCount 90 br i1 %cmp196, label %while.body197, label %if.then216 91 92 while.body197: ; preds = %land.rhs 93 br i1 undef, label %if.then205, label %while.cond191 94 95 if.then205: ; preds = %while.body197 96 br label %while.cond191.outer 97 98 if.then216: ; preds = %land.rhs, %while.cond191 99 br i1 undef, label %if.else, label %if.then221 100 101 if.then221: ; preds = %if.then216 102 unreachable 103 104 if.else: ; preds = %if.then216 105 br i1 undef, label %if.then266, label %if.end340 106 107 if.then266: ; preds = %if.else 108 switch i32 undef, label %if.else329 [ 109 i32 17, label %if.then285 110 i32 19, label %if.then285 111 i32 18, label %if.then285 112 i32 15, label %if.then285 113 ] 114 115 if.then285: ; preds = %if.then266, %if.then266, %if.then266, %if.then266 116 br i1 undef, label %if.then317, label %if.else324 117 118 if.then317: ; preds = %if.then285 119 br label %if.end340 120 121 if.else324: ; preds = %if.then285 122 unreachable 123 124 if.else329: ; preds = %if.then266 125 unreachable 126 127 if.end340: ; preds = %if.then317, %if.else 128 unreachable 129 130 if.end591: ; preds = %if.end126 131 br i1 undef, label %cond.end, label %cond.false 132 133 cond.false: ; preds = %if.end591 134 unreachable 135 136 cond.end: ; preds = %if.end591 137 ret void 138 } 139
