You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
31 lines
996 B
31 lines
996 B
; RUN: opt < %s -iv-users -S -disable-output
|
|
;
|
|
; PR12868: Infinite recursion:
|
|
; getUDivExpr()->getZeroExtendExpr()->isLoopBackedgeGuardedBy()
|
|
;
|
|
; We actually want SCEV simplification to fail gracefully in this
|
|
; case, so there's no output to check, just the absence of stack overflow.
|
|
|
|
@c = common global i8 0, align 1
|
|
|
|
define i32 @func() {
|
|
entry:
|
|
br label %for.cond
|
|
|
|
for.cond: ; preds = %for.body, %entry
|
|
%storemerge = phi i8 [ -1, %entry ], [ %inc, %for.body ]
|
|
%ui.0 = phi i32 [ undef, %entry ], [ %div, %for.body ]
|
|
%tobool = icmp eq i8 %storemerge, 0
|
|
br i1 %tobool, label %for.end, label %for.body
|
|
|
|
for.body: ; preds = %for.cond
|
|
%conv = sext i8 %storemerge to i32
|
|
%div = lshr i32 %conv, 1
|
|
%tobool2 = icmp eq i32 %div, 0
|
|
%inc = add i8 %storemerge, 1
|
|
br i1 %tobool2, label %for.cond, label %for.end
|
|
|
|
for.end: ; preds = %for.body, %for.cond
|
|
ret i32 0
|
|
}
|