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| ; RUN: opt -attributor --attributor-disable=false -attributor-max-iterations-verify -attributor-max-iterations=3 -S < %s | FileCheck %s
declare void @no_return_call() nofree noreturn nounwind readnone
declare void @normal_call() readnone
declare i32 @foo()
declare i32 @foo_noreturn_nounwind() noreturn nounwind
declare i32 @foo_noreturn() noreturn
declare i32 @bar() nosync readnone
; This internal function has no live call sites, so all its BBs are considered dead,
; and nothing should be deduced for it.
; CHECK-NOT: define internal i32 @dead_internal_func(i32 %0)
define internal i32 @dead_internal_func(i32 %0) {
%2 = icmp slt i32 %0, 1
br i1 %2, label %3, label %5
; <label>:3: ; preds = %5, %1
%4 = phi i32 [ 1, %1 ], [ %8, %5 ]
ret i32 %4
; <label>:5: ; preds = %1, %5
%6 = phi i32 [ %9, %5 ], [ 1, %1 ]
%7 = phi i32 [ %8, %5 ], [ 1, %1 ]
%8 = mul nsw i32 %6, %7
%9 = add nuw nsw i32 %6, 1
%10 = icmp eq i32 %6, %0
br i1 %10, label %3, label %5
}
; CHECK: Function Attrs: nofree norecurse nounwind uwtable willreturn
define i32 @volatile_load(i32*) norecurse nounwind uwtable {
%2 = load volatile i32, i32* %0, align 4
ret i32 %2
}
; CHECK: Function Attrs: nofree norecurse nosync nounwind readonly uwtable willreturn
; CHECK-NEXT: define internal i32 @internal_load(i32* nocapture nonnull readonly dereferenceable(4) %0)
define internal i32 @internal_load(i32*) norecurse nounwind uwtable {
%2 = load i32, i32* %0, align 4
ret i32 %2
}
; TEST 1: Only first block is live.
; CHECK: Function Attrs: nofree noreturn nosync nounwind
; CHECK-NEXT: define i32 @first_block_no_return(i32 %a, i32* nocapture nonnull readonly %ptr1, i32* nocapture readnone %ptr2)
define i32 @first_block_no_return(i32 %a, i32* nonnull %ptr1, i32* %ptr2) #0 {
entry:
call i32 @internal_load(i32* %ptr1)
; CHECK: call i32 @internal_load(i32* nocapture nonnull readonly %ptr1)
call void @no_return_call()
; CHECK: call void @no_return_call()
; CHECK-NEXT: unreachable
; CHECK-NEXT: }
call i32 @dead_internal_func(i32 10)
%cmp = icmp eq i32 %a, 0
br i1 %cmp, label %cond.true, label %cond.false
cond.true: ; preds = %entry
call i32 @internal_load(i32* %ptr2)
%load = call i32 @volatile_load(i32* %ptr1)
call void @normal_call()
%call = call i32 @foo()
br label %cond.end
cond.false: ; preds = %entry
call void @normal_call()
%call1 = call i32 @bar()
br label %cond.end
cond.end: ; preds = %cond.false, %cond.true
%cond = phi i32 [ %call, %cond.true ], [ %call1, %cond.false ]
ret i32 %cond
}
; TEST 2: cond.true is dead, but cond.end is not, since cond.false is live
; This is just an example. For example we can put a sync call in a
; dead block and check if it is deduced.
; CHECK: Function Attrs: nosync
; CHECK-NEXT: define i32 @dead_block_present(i32 %a, i32* nocapture readnone %ptr1)
define i32 @dead_block_present(i32 %a, i32* %ptr1) #0 {
entry:
%cmp = icmp eq i32 %a, 0
br i1 %cmp, label %cond.true, label %cond.false
cond.true: ; preds = %entry
call void @no_return_call()
; CHECK: call void @no_return_call()
; CHECK-NEXT: unreachable
%call = call i32 @volatile_load(i32* %ptr1)
br label %cond.end
cond.false: ; preds = %entry
call void @normal_call()
%call1 = call i32 @bar()
br label %cond.end
cond.end: ; preds = %cond.false, %cond.true
; CHECK: cond.end:
; CHECK-NEXT: ret i32 %call1
%cond = phi i32 [ %call, %cond.true ], [ %call1, %cond.false ]
ret i32 %cond
}
; TEST 3: both cond.true and cond.false are dead, therfore cond.end is dead as well.
define i32 @all_dead(i32 %a) #0 {
entry:
%cmp = icmp eq i32 %a, 0
br i1 %cmp, label %cond.true, label %cond.false
cond.true: ; preds = %entry
call void @no_return_call()
; CHECK: call void @no_return_call()
; CHECK-NEXT: unreachable
call i32 @dead_internal_func(i32 10)
; CHECK-NOT: call
%call = call i32 @foo()
br label %cond.end
cond.false: ; preds = %entry
call void @no_return_call()
; CHECK: call void @no_return_call()
; CHECK-NEXT: unreachable
call i32 @dead_internal_func(i32 10)
; CHECK-NEXT: }
%call1 = call i32 @bar()
br label %cond.end
cond.end: ; preds = %cond.false, %cond.true
%cond = phi i32 [ %call, %cond.true ], [ %call1, %cond.false ]
ret i32 %cond
}
declare i32 @__gxx_personality_v0(...)
; TEST 4: All blocks are live.
; CHECK: define i32 @all_live(i32 %a)
define i32 @all_live(i32 %a) #0 {
entry:
%cmp = icmp eq i32 %a, 0
br i1 %cmp, label %cond.true, label %cond.false
cond.true: ; preds = %entry
call void @normal_call()
%call = call i32 @foo_noreturn()
br label %cond.end
cond.false: ; preds = %entry
call void @normal_call()
%call1 = call i32 @bar()
br label %cond.end
cond.end: ; preds = %cond.false, %cond.true
%cond = phi i32 [ %call, %cond.true ], [ %call1, %cond.false ]
ret i32 %cond
}
; TEST 5 noreturn invoke instruction with a unreachable normal successor block.
; CHECK: define i32 @invoke_noreturn(i32 %a)
define i32 @invoke_noreturn(i32 %a) personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
entry:
%cmp = icmp eq i32 %a, 0
br i1 %cmp, label %cond.true, label %cond.false
cond.true: ; preds = %entry
call void @normal_call()
%call = invoke i32 @foo_noreturn() to label %continue
unwind label %cleanup
; CHECK: %call = invoke i32 @foo_noreturn()
; CHECK-NEXT: to label %continue unwind label %cleanup
cond.false: ; preds = %entry
call void @normal_call()
%call1 = call i32 @bar()
br label %cond.end
cond.end: ; preds = %cond.false, %continue
%cond = phi i32 [ %call, %continue ], [ %call1, %cond.false ]
ret i32 %cond
continue:
; CHECK: continue:
; CHECK-NEXT: unreachable
br label %cond.end
cleanup:
%res = landingpad { i8*, i32 }
catch i8* null
ret i32 0
}
; TEST 4.1 noreturn invoke instruction replaced by a call and an unreachable instruction
; put after it.
; CHECK: define i32 @invoke_noreturn_nounwind(i32 %a)
define i32 @invoke_noreturn_nounwind(i32 %a) personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
entry:
%cmp = icmp eq i32 %a, 0
br i1 %cmp, label %cond.true, label %cond.false
cond.true: ; preds = %entry
call void @normal_call()
%call = invoke i32 @foo_noreturn_nounwind() to label %continue
unwind label %cleanup
; CHECK: call void @normal_call()
; CHECK-NEXT: call i32 @foo_noreturn_nounwind()
; CHECK-NEXT: unreachable
; CHECK-NOT: @foo_noreturn_nounwind()
cond.false: ; preds = %entry
call void @normal_call()
%call1 = call i32 @bar()
br label %cond.end
cond.end: ; preds = %cond.false, %continue
%cond = phi i32 [ %call, %continue ], [ %call1, %cond.false ]
ret i32 %cond
continue:
br label %cond.end
cleanup:
%res = landingpad { i8*, i32 }
catch i8* null
ret i32 0
}
; TEST 6: Undefined behvior, taken from LangRef.
; FIXME: Should be able to detect undefined behavior.
; CHECK: define void @ub(i32* nocapture writeonly %0)
define void @ub(i32* %0) {
%poison = sub nuw i32 0, 1 ; Results in a poison value.
%still_poison = and i32 %poison, 0 ; 0, but also poison.
%poison_yet_again = getelementptr i32, i32* %0, i32 %still_poison
store i32 0, i32* %poison_yet_again ; Undefined behavior due to store to poison.
ret void
}
define void @inf_loop() #0 {
entry:
br label %while.body
while.body: ; preds = %entry, %while.body
br label %while.body
}
; TEST 7: Infinite loop.
; FIXME: Detect infloops, and mark affected blocks dead.
define i32 @test5(i32, i32) #0 {
%3 = icmp sgt i32 %0, %1
br i1 %3, label %cond.if, label %cond.elseif
cond.if: ; preds = %2
%4 = tail call i32 @bar()
br label %cond.end
cond.elseif: ; preds = %2
call void @inf_loop()
%5 = icmp slt i32 %0, %1
br i1 %5, label %cond.end, label %cond.else
cond.else: ; preds = %cond.elseif
%6 = tail call i32 @foo()
br label %cond.end
cond.end: ; preds = %cond.if, %cond.else, %cond.elseif
%7 = phi i32 [ %1, %cond.elseif ], [ 0, %cond.else ], [ 0, %cond.if ]
ret i32 %7
}
define void @rec() #0 {
entry:
call void @rec()
ret void
}
; TEST 8: Recursion
; FIXME: everything after first block should be marked dead
; and unreachable should be put after call to @rec().
define i32 @test6(i32, i32) #0 {
call void @rec()
%3 = icmp sgt i32 %0, %1
br i1 %3, label %cond.if, label %cond.elseif
cond.if: ; preds = %2
%4 = tail call i32 @bar()
br label %cond.end
cond.elseif: ; preds = %2
call void @rec()
%5 = icmp slt i32 %0, %1
br i1 %5, label %cond.end, label %cond.else
cond.else: ; preds = %cond.elseif
%6 = tail call i32 @foo()
br label %cond.end
cond.end: ; preds = %cond.if, %cond.else, %cond.elseif
%7 = phi i32 [ %1, %cond.elseif ], [ 0, %cond.else ], [ 0, %cond.if ]
ret i32 %7
}
; TEST 9: Recursion
; FIXME: contains recursive call to itself in cond.elseif block
define i32 @test7(i32, i32) #0 {
%3 = icmp sgt i32 %0, %1
br i1 %3, label %cond.if, label %cond.elseif
cond.if: ; preds = %2
%4 = tail call i32 @bar()
br label %cond.end
cond.elseif: ; preds = %2
%5 = tail call i32 @test7(i32 %0, i32 %1)
%6 = icmp slt i32 %0, %1
br i1 %6, label %cond.end, label %cond.else
cond.else: ; preds = %cond.elseif
%7 = tail call i32 @foo()
br label %cond.end
cond.end: ; preds = %cond.if, %cond.else, %cond.elseif
%8 = phi i32 [ %1, %cond.elseif ], [ 0, %cond.else ], [ 0, %cond.if ]
ret i32 %8
}
; SCC test
;
; char a1 __attribute__((aligned(8)));
; char a2 __attribute__((aligned(16)));
;
; char* f1(char* a ){
; return a?a:f2(&a1);
; }
; char* f2(char* a){
; return a?f1(a):f3(&a2);
; }
;
; char* f3(char* a){
; return a?&a1: f1(&a2);
; }
@a1 = common global i8 0, align 8
@a2 = common global i8 0, align 16
define internal i8* @f1(i8* readnone %0) local_unnamed_addr #0 {
; ATTRIBUTOR: define internal i8* @f1(i8* readnone %0)
%2 = icmp eq i8* %0, null
br i1 %2, label %3, label %5
; <label>:3: ; preds = %1
; ATTRIBUTOR: %4 = tail call i8* undef(i8* nonnull align 8 @a1)
%4 = tail call i8* @f2(i8* nonnull @a1)
br label %5
; <label>:5: ; preds = %1, %3
%6 = phi i8* [ %4, %3 ], [ %0, %1 ]
ret i8* %6
}
define internal i8* @f2(i8* readnone %0) local_unnamed_addr #0 {
; ATTRIBUTOR: define internal i8* @f2(i8* readnone %0)
%2 = icmp eq i8* %0, null
br i1 %2, label %5, label %3
; <label>:3: ; preds = %1
; ATTRIBUTOR: %4 = tail call i8* undef(i8* nonnull align 8 %0)
%4 = tail call i8* @f1(i8* nonnull %0)
br label %7
; <label>:5: ; preds = %1
; ATTRIBUTOR: %6 = tail call i8* undef(i8* nonnull align 16 @a2)
%6 = tail call i8* @f3(i8* nonnull @a2)
br label %7
; <label>:7: ; preds = %5, %3
%8 = phi i8* [ %4, %3 ], [ %6, %5 ]
ret i8* %8
}
define internal i8* @f3(i8* readnone %0) local_unnamed_addr #0 {
; ATTRIBUTOR: define internal i8* @f3(i8* readnone %0)
%2 = icmp eq i8* %0, null
br i1 %2, label %3, label %5
; <label>:3: ; preds = %1
; ATTRIBUTOR: %4 = tail call i8* undef(i8* nonnull align 16 @a2)
%4 = tail call i8* @f1(i8* nonnull @a2)
br label %5
; <label>:5: ; preds = %1, %3
%6 = phi i8* [ %4, %3 ], [ @a1, %1 ]
ret i8* %6
}
define void @test_unreachable() {
; CHECK: define void @test_unreachable()
; CHECK-NEXT: call void @test_unreachable()
; CHECK-NEXT: unreachable
; CHECK-NEXT: }
call void @test_unreachable()
unreachable
}
define linkonce_odr void @non_exact1() {
call void @non_dead_a0()
call void @non_dead_a1()
call void @non_dead_a2()
call void @non_dead_a3()
call void @non_dead_a4()
call void @non_dead_a5()
call void @non_dead_a6()
call void @non_dead_a7()
call void @non_dead_a8()
call void @non_dead_a9()
call void @non_dead_a10()
call void @non_dead_a11()
call void @non_dead_a12()
call void @non_dead_a13()
call void @non_dead_a14()
call void @non_dead_a15()
call void @middle()
ret void
}
define internal void @middle() {
bb0:
call void @non_dead_b0()
call void @non_dead_b1()
call void @non_dead_b2()
call void @non_dead_b3()
br label %bb1
bb1:
call void @non_dead_b4()
call void @non_dead_b5()
call void @non_dead_b6()
call void @non_dead_b7()
br label %bb2
bb2:
call void @non_dead_b8()
call void @non_dead_b9()
call void @non_dead_b10()
call void @non_dead_b11()
br label %bb3
bb3:
call void @non_dead_b12()
call void @non_dead_b13()
call void @non_dead_b14()
call void @non_dead_b15()
br label %bb4
bb4:
call void @non_exact2()
ret void
}
define linkonce_odr void @non_exact2() {
call void @non_dead_c0()
call void @non_dead_c1()
call void @non_dead_c2()
call void @non_dead_c3()
call void @non_dead_c4()
call void @non_dead_c5()
call void @non_dead_c6()
call void @non_dead_c7()
call void @non_dead_c8()
call void @non_dead_c9()
call void @non_dead_c10()
call void @non_dead_c11()
call void @non_dead_c12()
call void @non_dead_c13()
call void @non_dead_c14()
call void @non_dead_c15()
call void @non_exact3()
ret void
}
define linkonce_odr void @non_exact3() {
call void @non_dead_d0()
call void @non_dead_d1()
call void @non_dead_d2()
call void @non_dead_d3()
call void @non_dead_d4()
call void @non_dead_d5()
call void @non_dead_d6()
call void @non_dead_d7()
call void @non_dead_d8()
call void @non_dead_d9()
call void @non_dead_d10()
call void @non_dead_d11()
call void @non_dead_d12()
call void @non_dead_d13()
call void @non_dead_d14()
call void @non_dead_d15()
%nr = call i32 @foo_noreturn()
call void @dead_e1()
ret void
}
; CHECK: define linkonce_odr void @non_exact3() {
; CHECK-NEXT: call void @non_dead_d0()
; CHECK-NEXT: call void @non_dead_d1()
; CHECK-NEXT: call void @non_dead_d2()
; CHECK-NEXT: call void @non_dead_d3()
; CHECK-NEXT: call void @non_dead_d4()
; CHECK-NEXT: call void @non_dead_d5()
; CHECK-NEXT: call void @non_dead_d6()
; CHECK-NEXT: call void @non_dead_d7()
; CHECK-NEXT: call void @non_dead_d8()
; CHECK-NEXT: call void @non_dead_d9()
; CHECK-NEXT: call void @non_dead_d10()
; CHECK-NEXT: call void @non_dead_d11()
; CHECK-NEXT: call void @non_dead_d12()
; CHECK-NEXT: call void @non_dead_d13()
; CHECK-NEXT: call void @non_dead_d14()
; CHECK-NEXT: call void @non_dead_d15()
; CHECK-NEXT: %nr = call i32 @foo_noreturn()
; CHECK-NEXT: unreachable
; CHECK-NEXT: }
define internal void @non_dead_a0() { ret void }
define internal void @non_dead_a1() { ret void }
define internal void @non_dead_a2() { ret void }
define internal void @non_dead_a3() { ret void }
define internal void @non_dead_a4() { ret void }
define internal void @non_dead_a5() { ret void }
define internal void @non_dead_a6() { ret void }
define internal void @non_dead_a7() { ret void }
define internal void @non_dead_a8() { ret void }
define internal void @non_dead_a9() { ret void }
define internal void @non_dead_a10() { ret void }
define internal void @non_dead_a11() { ret void }
define internal void @non_dead_a12() { ret void }
define internal void @non_dead_a13() { ret void }
define internal void @non_dead_a14() { ret void }
define internal void @non_dead_a15() { ret void }
define internal void @non_dead_b0() { ret void }
define internal void @non_dead_b1() { ret void }
define internal void @non_dead_b2() { ret void }
define internal void @non_dead_b3() { ret void }
define internal void @non_dead_b4() { ret void }
define internal void @non_dead_b5() { ret void }
define internal void @non_dead_b6() { ret void }
define internal void @non_dead_b7() { ret void }
define internal void @non_dead_b8() { ret void }
define internal void @non_dead_b9() { ret void }
define internal void @non_dead_b10() { ret void }
define internal void @non_dead_b11() { ret void }
define internal void @non_dead_b12() { ret void }
define internal void @non_dead_b13() { ret void }
define internal void @non_dead_b14() { ret void }
define internal void @non_dead_b15() { ret void }
define internal void @non_dead_c0() { ret void }
define internal void @non_dead_c1() { ret void }
define internal void @non_dead_c2() { ret void }
define internal void @non_dead_c3() { ret void }
define internal void @non_dead_c4() { ret void }
define internal void @non_dead_c5() { ret void }
define internal void @non_dead_c6() { ret void }
define internal void @non_dead_c7() { ret void }
define internal void @non_dead_c8() { ret void }
define internal void @non_dead_c9() { ret void }
define internal void @non_dead_c10() { ret void }
define internal void @non_dead_c11() { ret void }
define internal void @non_dead_c12() { ret void }
define internal void @non_dead_c13() { ret void }
define internal void @non_dead_c14() { ret void }
define internal void @non_dead_c15() { ret void }
define internal void @non_dead_d0() { ret void }
define internal void @non_dead_d1() { ret void }
define internal void @non_dead_d2() { ret void }
define internal void @non_dead_d3() { ret void }
define internal void @non_dead_d4() { ret void }
define internal void @non_dead_d5() { ret void }
define internal void @non_dead_d6() { ret void }
define internal void @non_dead_d7() { ret void }
define internal void @non_dead_d8() { ret void }
define internal void @non_dead_d9() { ret void }
define internal void @non_dead_d10() { ret void }
define internal void @non_dead_d11() { ret void }
define internal void @non_dead_d12() { ret void }
define internal void @non_dead_d13() { ret void }
define internal void @non_dead_d14() { ret void }
define internal void @non_dead_d15() { ret void }
define internal void @dead_e0() { call void @dead_e1() ret void }
define internal void @dead_e1() { call void @dead_e2() ret void }
define internal void @dead_e2() { ret void }
; CHECK: define internal void @non_dead_a0()
; CHECK: define internal void @non_dead_a1()
; CHECK: define internal void @non_dead_a2()
; CHECK: define internal void @non_dead_a3()
; CHECK: define internal void @non_dead_a4()
; CHECK: define internal void @non_dead_a5()
; CHECK: define internal void @non_dead_a6()
; CHECK: define internal void @non_dead_a7()
; CHECK: define internal void @non_dead_a8()
; CHECK: define internal void @non_dead_a9()
; CHECK: define internal void @non_dead_a10()
; CHECK: define internal void @non_dead_a11()
; CHECK: define internal void @non_dead_a12()
; CHECK: define internal void @non_dead_a13()
; CHECK: define internal void @non_dead_a14()
; CHECK: define internal void @non_dead_a15()
; CHECK: define internal void @non_dead_b0()
; CHECK: define internal void @non_dead_b1()
; CHECK: define internal void @non_dead_b2()
; CHECK: define internal void @non_dead_b3()
; CHECK: define internal void @non_dead_b4()
; CHECK: define internal void @non_dead_b5()
; CHECK: define internal void @non_dead_b6()
; CHECK: define internal void @non_dead_b7()
; CHECK: define internal void @non_dead_b8()
; CHECK: define internal void @non_dead_b9()
; CHECK: define internal void @non_dead_b10()
; CHECK: define internal void @non_dead_b11()
; CHECK: define internal void @non_dead_b12()
; CHECK: define internal void @non_dead_b13()
; CHECK: define internal void @non_dead_b14()
; CHECK: define internal void @non_dead_b15()
; CHECK: define internal void @non_dead_c0()
; CHECK: define internal void @non_dead_c1()
; CHECK: define internal void @non_dead_c2()
; CHECK: define internal void @non_dead_c3()
; CHECK: define internal void @non_dead_c4()
; CHECK: define internal void @non_dead_c5()
; CHECK: define internal void @non_dead_c6()
; CHECK: define internal void @non_dead_c7()
; CHECK: define internal void @non_dead_c8()
; CHECK: define internal void @non_dead_c9()
; CHECK: define internal void @non_dead_c10()
; CHECK: define internal void @non_dead_c11()
; CHECK: define internal void @non_dead_c12()
; CHECK: define internal void @non_dead_c13()
; CHECK: define internal void @non_dead_c14()
; CHECK: define internal void @non_dead_c15()
; CHECK: define internal void @non_dead_d0()
; CHECK: define internal void @non_dead_d1()
; CHECK: define internal void @non_dead_d2()
; CHECK: define internal void @non_dead_d3()
; CHECK: define internal void @non_dead_d4()
; CHECK: define internal void @non_dead_d5()
; CHECK: define internal void @non_dead_d6()
; CHECK: define internal void @non_dead_d7()
; CHECK: define internal void @non_dead_d8()
; CHECK: define internal void @non_dead_d9()
; CHECK: define internal void @non_dead_d10()
; CHECK: define internal void @non_dead_d11()
; CHECK: define internal void @non_dead_d12()
; CHECK: define internal void @non_dead_d13()
; CHECK: define internal void @non_dead_d14()
; Verify we actually deduce information for these functions.
; CHECK: Function Attrs: nofree nosync nounwind readnone willreturn
; CHECK-NEXT: define internal void @non_dead_d15()
; CHECK-NOT: define internal void @dead_e
declare void @blowup() noreturn
define void @live_with_dead_entry() personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
; CHECK: define void @live_with_dead_entry(
; CHECK-NEXT: entry:
; CHECK-NEXT: invoke void @blowup()
; CHECK-NEXT: to label %live_with_dead_entry.dead unwind label %lpad
; CHECK: lpad: ; preds = %entry
; CHECK-NEXT: %0 = landingpad { i8*, i32 }
; CHECK-NEXT: catch i8* null
; CHECK-NEXT: br label %live_with_dead_entry
; CHECK: live_with_dead_entry.dead: ; preds = %entry
; CHECK-NEXT: unreachable
; CHECK: live_with_dead_entry: ; preds = %lpad
; CHECK-NEXT: ret void
entry:
invoke void @blowup() to label %live_with_dead_entry unwind label %lpad
lpad:
%0 = landingpad { i8*, i32 } catch i8* null
br label %live_with_dead_entry
live_with_dead_entry:
ret void
}
define void @live_with_dead_entry_lp() personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
; CHECK: define void @live_with_dead_entry_lp(
; CHECK-NEXT: entry:
; CHECK-NEXT: invoke void @blowup()
; CHECK-NEXT: to label %live_with_dead_entry.dead unwind label %lp1
; CHECK: lp1: ; preds = %entry
; CHECK-NEXT: %lp = landingpad { i8*, i32 }
; CHECK-NEXT: catch i8* null
; CHECK-NEXT: invoke void @blowup()
; CHECK-NEXT: to label %live_with_dead_entry.dead1 unwind label %lp2
; CHECK: lp2: ; preds = %lp1
; CHECK-NEXT: %0 = landingpad { i8*, i32 }
; CHECK-NEXT: catch i8* null
; CHECK-NEXT: br label %live_with_dead_entry
; CHECK: live_with_dead_entry.dead: ; preds = %entry
; CHECK-NEXT: unreachable
; CHECK: live_with_dead_entry.dead1: ; preds = %lp1
; CHECK-NEXT: unreachable
; CHECK: live_with_dead_entry: ; preds = %lp2
; CHECK-NEXT: ret void
entry:
invoke void @blowup() to label %live_with_dead_entry unwind label %lp1
lp1:
%lp = landingpad { i8*, i32 } catch i8* null
invoke void @blowup() to label %live_with_dead_entry unwind label %lp2
lp2:
%0 = landingpad { i8*, i32 } catch i8* null
br label %live_with_dead_entry
live_with_dead_entry:
ret void
}
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