1; RUN: opt -S < %s -indvars | opt -analyze -iv-users | grep "%cmp = icmp slt i32" | grep "= {%\.ph,+,1}<%for.cond>" 2; PR8079 3 4; Provide legal integer types. 5target datalayout = "n8:16:32:64" 6 7; LoopSimplify should invalidate indvars when splitting out the 8; inner loop. 9 10@maxStat = external global i32 11 12define i32 @test() nounwind { 13entry: 14 br label %for.cond 15 16for.cond: ; preds = %if.then5, %if.end, %entry 17 %cuts.1 = phi i32 [ 0, %entry ], [ %inc, %if.then5 ], [ %cuts.1, %if.end ] 18 %0 = phi i32 [ 0, %entry ], [ %add, %if.end ], [ %add, %if.then5 ] 19 %add = add i32 %0, 1 20 %cmp = icmp slt i32 %0, 1 21 %tmp1 = load i32, i32* @maxStat, align 4 22 br i1 %cmp, label %for.body, label %for.cond14.preheader 23 24for.cond14.preheader: ; preds = %for.cond 25 %cmp1726 = icmp sgt i32 %tmp1, 0 26 br i1 %cmp1726, label %for.body18, label %return 27 28for.body: ; preds = %for.cond 29 %cmp2 = icmp sgt i32 %tmp1, 100 30 br i1 %cmp2, label %return, label %if.end 31 32if.end: ; preds = %for.body 33 %cmp4 = icmp sgt i32 %tmp1, -1 34 br i1 %cmp4, label %if.then5, label %for.cond 35 36if.then5: ; preds = %if.end 37 call void @foo() nounwind 38 %inc = add i32 %cuts.1, 1 39 br label %for.cond 40 41for.body18: ; preds = %for.body18, %for.cond14.preheader 42 %i13.027 = phi i32 [ %1, %for.body18 ], [ 0, %for.cond14.preheader ] 43 call void @foo() nounwind 44 %1 = add nsw i32 %i13.027, 1 45 %tmp16 = load i32, i32* @maxStat, align 4 46 %cmp17 = icmp slt i32 %1, %tmp16 47 br i1 %cmp17, label %for.body18, label %return 48 49return: ; preds = %for.body18, %for.body, %for.cond14.preheader 50 ret i32 0 51} 52 53declare void @foo() nounwind 54 55; Notify SCEV when removing an ExitingBlock. 56; CHECK-LABEL: @mergeExit( 57; CHECK: while.cond191: 58; CHECK: br i1 %or.cond, label %while.body197 59; CHECK-NOT: land.rhs: 60; CHECK: ret 61define void @mergeExit(i32 %MapAttrCount) nounwind uwtable ssp { 62entry: 63 br i1 undef, label %if.then124, label %if.end126 64 65if.then124: ; preds = %entry 66 unreachable 67 68if.end126: ; preds = %entry 69 br i1 undef, label %while.body.lr.ph, label %if.end591 70 71while.body.lr.ph: ; preds = %if.end126 72 br i1 undef, label %if.end140, label %if.then137 73 74if.then137: ; preds = %while.body.lr.ph 75 unreachable 76 77if.end140: ; preds = %while.body.lr.ph 78 br i1 undef, label %while.cond191.outer, label %if.then148 79 80if.then148: ; preds = %if.end140 81 unreachable 82 83while.cond191.outer: ; preds = %if.then205, %if.end140 84 br label %while.cond191 85 86while.cond191: ; preds = %while.body197, %while.cond191.outer 87 %CppIndex.0 = phi i32 [ %inc, %while.body197 ], [ undef, %while.cond191.outer ] 88 br i1 undef, label %land.rhs, label %if.then216 89 90land.rhs: ; preds = %while.cond191 91 %inc = add i32 %CppIndex.0, 1 92 %cmp196 = icmp ult i32 %inc, %MapAttrCount 93 br i1 %cmp196, label %while.body197, label %if.then216 94 95while.body197: ; preds = %land.rhs 96 br i1 undef, label %if.then205, label %while.cond191 97 98if.then205: ; preds = %while.body197 99 br label %while.cond191.outer 100 101if.then216: ; preds = %land.rhs, %while.cond191 102 br i1 undef, label %if.else, label %if.then221 103 104if.then221: ; preds = %if.then216 105 unreachable 106 107if.else: ; preds = %if.then216 108 br i1 undef, label %if.then266, label %if.end340 109 110if.then266: ; preds = %if.else 111 switch i32 undef, label %if.else329 [ 112 i32 17, label %if.then285 113 i32 19, label %if.then285 114 i32 18, label %if.then285 115 i32 15, label %if.then285 116 ] 117 118if.then285: ; preds = %if.then266, %if.then266, %if.then266, %if.then266 119 br i1 undef, label %if.then317, label %if.else324 120 121if.then317: ; preds = %if.then285 122 br label %if.end340 123 124if.else324: ; preds = %if.then285 125 unreachable 126 127if.else329: ; preds = %if.then266 128 unreachable 129 130if.end340: ; preds = %if.then317, %if.else 131 unreachable 132 133if.end591: ; preds = %if.end126 134 br i1 undef, label %cond.end, label %cond.false 135 136cond.false: ; preds = %if.end591 137 unreachable 138 139cond.end: ; preds = %if.end591 140 ret void 141} 142