| ; 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 | |
| } |