mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-24 11:42:57 +01:00
31 lines
996 B
LLVM
31 lines
996 B
LLVM
|
; 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 absense 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
|
||
|
|
}
|