mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-24 06:30:19 +00:00
28 lines
978 B
LLVM
28 lines
978 B
LLVM
|
; RUN: opt < %s -analyze -scalar-evolution | FileCheck %s
|
||
|
|
|
||
|
|
; PR13228
|
||
|
|
define void @f() nounwind uwtable readnone {
|
||
|
|
entry:
|
||
|
|
br label %for.cond
|
||
|
|
|
||
|
|
for.cond: ; preds = %for.cond, %entry
|
||
|
|
%c.0 = phi i8 [ 1, %entry ], [ 0, %for.cond ]
|
||
|
|
%i.0 = phi i8 [ 0, %entry ], [ %inc, %for.cond ]
|
||
|
|
%lnot = icmp eq i8 %i.0, 0
|
||
|
|
%inc = add i8 %i.0, 1
|
||
|
|
br i1 %lnot, label %for.cond, label %while.cond
|
||
|
|
|
||
|
|
while.cond: ; preds = %while.body, %for.cond
|
||
|
|
%b.2 = phi i8 [ %add, %while.body ], [ 0, %for.cond ]
|
||
|
|
br i1 undef, label %while.end, label %while.body
|
||
|
|
|
||
|
|
while.body: ; preds = %while.cond
|
||
|
|
%add = add i8 %b.2, %c.0
|
||
|
|
%tobool7 = icmp eq i8 %add, 0
|
||
|
|
br i1 %tobool7, label %while.end, label %while.cond
|
||
|
|
|
||
|
|
while.end: ; preds = %while.body, %while.cond
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
;CHECK: Loop %while.cond: <multiple exits> Unpredictable backedge-taken count.
|