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; Make sure we don't end up in an infinite recursion in singleReachablePHIPath().
; RUN: opt < %s -passes=newgvn -S | FileCheck %s
@c = external global i64, align 8
; CHECK-LABEL: define void @tinkywinky() {
; CHECK: entry:
; CHECK-NEXT: br i1 undef, label %l2, label %if.then
; CHECK: if.then: ; preds = %entry
; CHECK-NEXT: br label %for.body
; CHECK: ph: ; preds = %back, %ontrue
; CHECK-NEXT: br label %for.body
; CHECK: for.body: ; preds = %ph, %if.then
; CHECK-NEXT: br i1 undef, label %ontrue, label %onfalse
; CHECK: onfalse: ; preds = %for.body
; CHECK-NEXT: %patatino = load i64, ptr @c
; CHECK-NEXT: ret void
; CHECK: ontrue: ; preds = %for.body
; CHECK-NEXT: %dipsy = load i64, ptr @c
; CHECK-NEXT: br label %ph
; CHECK: back: ; preds = %l2
; CHECK-NEXT: store i8 poison, ptr null
; CHECK-NEXT: br label %ph
; CHECK: end: ; preds = %l2
; CHECK-NEXT: ret void
; CHECK: l2: ; preds = %entry
; CHECK-NEXT: br i1 false, label %back, label %end
; CHECK-NEXT: }
define void @tinkywinky() {
entry:
br i1 undef, label %l2, label %if.then
if.then:
br label %for.body
ph:
br label %for.body
for.body:
br i1 undef, label %ontrue, label %onfalse
onfalse:
%patatino = load i64, ptr @c
store i64 %patatino, ptr @c
ret void
ontrue:
%dipsy = load i64, ptr @c
store i64 %dipsy, ptr @c
br label %ph
back:
br label %ph
end:
ret void
l2:
br i1 false, label %back, label %end
}
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