; RUN: opt < %s -disable-output -passes='print<cycles>' 2>&1 | FileCheck %s -check-prefix=CHECK
define void @empty() {
; CHECK-LABEL: CycleInfo for function: empty
; CHECK-NOT: depth
ret void
}
define void @simple() {
; CHECK-LABEL: CycleInfo for function: simple
; CHECK: depth=1: entries(loop)
entry:
br label %loop
loop:
br i1 undef, label %loop, label %exit
exit:
ret void
}
define void @two_latches() {
; CHECK-LABEL: CycleInfo for function: two_latches
; CHECK: depth=1: entries(loop) loop_next
entry:
br label %loop
loop:
br i1 undef, label %loop, label %loop_next
loop_next:
br i1 undef, label %exit, label %loop
exit:
ret void
}
define void @nested_simple() {
; CHECK-LABEL: CycleInfo for function: nested_simple
; CHECK: depth=1: entries(outer_header) outer_latch inner
; CHECK: depth=2: entries(inner)
entry:
br label %outer_header
outer_header:
br label %inner
inner:
br i1 undef, label %inner, label %outer_latch
outer_latch:
br i1 undef, label %outer_header, label %exit
exit:
ret void
}
define void @nested_outer_latch_in_inner_loop() {
; CHECK-LABEL: CycleInfo for function: nested_outer_latch_in_inner_loop
; CHECK: depth=1: entries(outer_header) inner_header inner_latch
; CHECK: depth=2: entries(inner_header) inner_latch
entry:
br label %outer_header
outer_header:
br label %inner_header
inner_header:
br i1 undef, label %inner_latch, label %outer_header
inner_latch:
br i1 undef, label %exit, label %inner_header
exit:
ret void
}
define void @sibling_loops() {
; CHECK-LABEL: CycleInfo for function: sibling_loops
; CHECK-DAG: depth=1: entries(left)
; CHECK-DAG: depth=1: entries(right)
entry:
br i1 undef, label %left, label %right
left:
br i1 undef, label %left, label %exit
right:
br i1 undef, label %right, label %exit
exit:
ret void
}
define void @serial_loops() {
; CHECK-LABEL: CycleInfo for function: serial_loops
; CHECK-DAG: depth=1: entries(second)
; CHECK-DAG: depth=1: entries(first)
entry:
br label %first
first:
br i1 undef, label %first, label %second
second:
br i1 undef, label %second, label %exit
exit:
ret void
}
define void @nested_sibling_loops() {
; CHECK-LABEL: CycleInfo for function: nested_sibling_loops
; CHECK: depth=1: entries(outer_header) left right
; CHECK-DAG: depth=2: entries(right)
; CHECK-DAG: depth=2: entries(left)
entry:
br label %outer_header
outer_header:
br i1 undef, label %left, label %right
left:
switch i32 undef, label %exit [ i32 0, label %left
i32 1, label %outer_header ]
right:
switch i32 undef, label %outer_header [ i32 0, label %exit
i32 1, label %right ]
exit:
ret void
}
define void @deeper_nest() {
; CHECK-LABEL: CycleInfo for function: deeper_nest
; CHECK: depth=1: entries(outer_header) outer_latch middle_header inner_header inner_latch
; CHECK: depth=2: entries(middle_header) inner_header inner_latch
; CHECK: depth=3: entries(inner_header) inner_latch
entry:
br label %outer_header
outer_header:
br label %middle_header
middle_header:
br label %inner_header
inner_header:
br i1 undef, label %middle_header, label %inner_latch
inner_latch:
br i1 undef, label %inner_header, label %outer_latch
outer_latch:
br i1 undef, label %outer_header, label %exit
exit:
ret void
}
define void @irreducible_basic() {
; CHECK-LABEL: CycleInfo for function: irreducible_basic
; CHECK: depth=1: entries(right left)
entry:
br i1 undef, label %left, label %right
left:
br i1 undef, label %right, label %exit
right:
br i1 undef, label %left, label %exit
exit:
ret void
}
define void @irreducible_mess() {
; CHECK-LABEL: CycleInfo for function: irreducible_mess
; CHECK: depth=1: entries(B A) D C
; CHECK: depth=2: entries(D C A)
; CHECK: depth=3: entries(C A)
entry:
br i1 undef, label %A, label %B
A:
br i1 undef, label %C, label %D
B:
br i1 undef, label %C, label %D
C:
switch i32 undef, label %A [ i32 0, label %D
i32 1, label %exit ]
D:
switch i32 undef, label %B [ i32 0, label %C
i32 1, label %exit ]
exit:
ret void
}
define void @irreducible_into_simple_cycle() {
; CHECK-LABEL: CycleInfo for function: irreducible_into_simple_cycle
; CHECK: depth=1: entries(F C A) E D B
entry:
switch i32 undef, label %A [ i32 0, label %C
i32 1, label %F ]
A:
br label %B
B:
br label %C
C:
br label %D
D:
br i1 undef, label %E, label %exit
E:
br label %F
F:
br i1 undef, label %A, label %exit
exit:
ret void
}
define void @irreducible_mountain_bug() {
; CHECK-LABEL: CycleInfo for function: irreducible_mountain_bug
; CHECK: depth=1: entries(while.cond)
; CHECK: depth=2: entries(cond.end61 cond.true49) while.body63 while.cond47
; CHECK: depth=3: entries(while.body63 cond.true49) while.cond47
entry:
br i1 undef, label %if.end, label %if.then
if.end:
br i1 undef, label %if.then7, label %if.else
if.then7:
br label %if.end16
if.else:
br label %if.end16
if.end16:
br i1 undef, label %while.cond.preheader, label %if.then39
while.cond.preheader:
br label %while.cond
while.cond:
br i1 undef, label %cond.true49, label %lor.rhs
cond.true49:
br i1 undef, label %if.then69, label %while.body63
while.body63:
br i1 undef, label %exit, label %while.cond47
while.cond47:
br i1 undef, label %cond.true49, label %cond.end61
cond.end61:
br i1 undef, label %while.body63, label %while.cond
if.then69:
br i1 undef, label %exit, label %while.cond
lor.rhs:
br i1 undef, label %cond.end61, label %while.end76
while.end76:
br label %exit
if.then39:
br i1 undef, label %exit, label %if.end.i145
if.end.i145:
br i1 undef, label %exit, label %if.end8.i149
if.end8.i149:
br label %exit
if.then:
br i1 undef, label %exit, label %if.end.i
if.end.i:
br i1 undef, label %exit, label %if.end8.i
if.end8.i:
br label %exit
exit:
ret void
}