| ; RUN: opt -S < %s -indvars | opt -analyze -iv-users | grep {%cmp = icmp slt i32} | grep {= \{%\\.ph,+,1\}<%for.cond>} |
| ; PR8079 |
| |
| ; LoopSimplify should invalidate indvars when splitting out the |
| ; inner loop. |
| |
| @maxStat = external global i32 |
| |
| define i32 @test() nounwind { |
| entry: |
| br label %for.cond |
| |
| for.cond: ; preds = %if.then5, %if.end, %entry |
| %cuts.1 = phi i32 [ 0, %entry ], [ %inc, %if.then5 ], [ %cuts.1, %if.end ] |
| %0 = phi i32 [ 0, %entry ], [ %add, %if.end ], [ %add, %if.then5 ] |
| %add = add i32 %0, 1 |
| %cmp = icmp slt i32 %0, 1 |
| %tmp1 = load i32* @maxStat, align 4 |
| br i1 %cmp, label %for.body, label %for.cond14.preheader |
| |
| for.cond14.preheader: ; preds = %for.cond |
| %cmp1726 = icmp sgt i32 %tmp1, 0 |
| br i1 %cmp1726, label %for.body18, label %return |
| |
| for.body: ; preds = %for.cond |
| %cmp2 = icmp sgt i32 %tmp1, 100 |
| br i1 %cmp2, label %return, label %if.end |
| |
| if.end: ; preds = %for.body |
| %cmp4 = icmp sgt i32 %tmp1, -1 |
| br i1 %cmp4, label %if.then5, label %for.cond |
| |
| if.then5: ; preds = %if.end |
| call void @foo() nounwind |
| %inc = add i32 %cuts.1, 1 |
| br label %for.cond |
| |
| for.body18: ; preds = %for.body18, %for.cond14.preheader |
| %i13.027 = phi i32 [ %1, %for.body18 ], [ 0, %for.cond14.preheader ] |
| call void @foo() nounwind |
| %1 = add nsw i32 %i13.027, 1 |
| %tmp16 = load i32* @maxStat, align 4 |
| %cmp17 = icmp slt i32 %1, %tmp16 |
| br i1 %cmp17, label %for.body18, label %return |
| |
| return: ; preds = %for.body18, %for.body, %for.cond14.preheader |
| ret i32 0 |
| } |
| |
| declare void @foo() nounwind |
| |
| ; Notify SCEV when removing an ExitingBlock. |
| ; CHECK: @mergeExit |
| ; CHECK: while.cond191: |
| ; CHECK: br i1 %or.cond, label %while.body197 |
| ; CHECK-NOT: land.rhs: |
| ; CHECK: ret |
| define void @mergeExit(i32 %MapAttrCount) nounwind uwtable ssp { |
| entry: |
| br i1 undef, label %if.then124, label %if.end126 |
| |
| if.then124: ; preds = %entry |
| unreachable |
| |
| if.end126: ; preds = %entry |
| br i1 undef, label %while.body.lr.ph, label %if.end591 |
| |
| while.body.lr.ph: ; preds = %if.end126 |
| br i1 undef, label %if.end140, label %if.then137 |
| |
| if.then137: ; preds = %while.body.lr.ph |
| unreachable |
| |
| if.end140: ; preds = %while.body.lr.ph |
| br i1 undef, label %while.cond191.outer, label %if.then148 |
| |
| if.then148: ; preds = %if.end140 |
| unreachable |
| |
| while.cond191.outer: ; preds = %if.then205, %if.end140 |
| br label %while.cond191 |
| |
| while.cond191: ; preds = %while.body197, %while.cond191.outer |
| %CppIndex.0 = phi i32 [ %inc, %while.body197 ], [ undef, %while.cond191.outer ] |
| br i1 undef, label %land.rhs, label %if.then216 |
| |
| land.rhs: ; preds = %while.cond191 |
| %inc = add i32 %CppIndex.0, 1 |
| %cmp196 = icmp ult i32 %inc, %MapAttrCount |
| br i1 %cmp196, label %while.body197, label %if.then216 |
| |
| while.body197: ; preds = %land.rhs |
| br i1 undef, label %if.then205, label %while.cond191 |
| |
| if.then205: ; preds = %while.body197 |
| br label %while.cond191.outer |
| |
| if.then216: ; preds = %land.rhs, %while.cond191 |
| br i1 undef, label %if.else, label %if.then221 |
| |
| if.then221: ; preds = %if.then216 |
| unreachable |
| |
| if.else: ; preds = %if.then216 |
| br i1 undef, label %if.then266, label %if.end340 |
| |
| if.then266: ; preds = %if.else |
| switch i32 undef, label %if.else329 [ |
| i32 17, label %if.then285 |
| i32 19, label %if.then285 |
| i32 18, label %if.then285 |
| i32 15, label %if.then285 |
| ] |
| |
| if.then285: ; preds = %if.then266, %if.then266, %if.then266, %if.then266 |
| br i1 undef, label %if.then317, label %if.else324 |
| |
| if.then317: ; preds = %if.then285 |
| br label %if.end340 |
| |
| if.else324: ; preds = %if.then285 |
| unreachable |
| |
| if.else329: ; preds = %if.then266 |
| unreachable |
| |
| if.end340: ; preds = %if.then317, %if.else |
| unreachable |
| |
| if.end591: ; preds = %if.end126 |
| br i1 undef, label %cond.end, label %cond.false |
| |
| cond.false: ; preds = %if.end591 |
| unreachable |
| |
| cond.end: ; preds = %if.end591 |
| ret void |
| } |
