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llvm-6502/test/Transforms/ObjCARC/nested.ll
Michael Gottesman 6bc127e1dd [objc-arc] Make the ARC optimizer more conservative by forcing it to be non-safe in both direction, but mitigate the problem by noting that we just care if there was a further use. 
The problem here is the infamous one direction known safe. I was
hesitant to turn it off before b/c of the potential for regressions
without an actual bug from users hitting the problem. This is that bug ;
).

The main performance impact of having known safe in both directions is
that often times it is very difficult to find two releases without a use
in-between them since we are so conservative with determining potential
uses. The one direction known safe gets around that problem by taking
advantage of many situations where we have two retains in a row,
allowing us to avoid that problem. That being said, the one direction
known safe is unsafe. Consider the following situation:

retain(x)
retain(x)
call(x)
call(x)
release(x)

Then we know the following about the reference count of x:

// rc(x) == N (for some N).
retain(x)
// rc(x) == N+1
retain(x)
// rc(x) == N+2
call A(x)
call B(x)
// rc(x) >= 1 (since we can not release a deallocated pointer).
release(x)
// rc(x) >= 0

That is all the information that we can know statically. That means that
we know that A(x), B(x) together can release (x) at most N+1 times. Lets
say that we remove the inner retain, release pair.

// rc(x) == N (for some N).
retain(x)
// rc(x) == N+1
call A(x)
call B(x)
// rc(x) >= 1
release(x)
// rc(x) >= 0

We knew before that A(x), B(x) could release x up to N+1 times meaning
that rc(x) may be zero at the release(x). That is not safe. On the other
hand, consider the following situation where we have a must use of
release(x) that x must be kept alive for after the release(x)**. Then we
know that:

// rc(x) == N (for some N).
retain(x)
// rc(x) == N+1
retain(x)
// rc(x) == N+2
call A(x)
call B(x)
// rc(x) >= 2 (since we know that we are going to release x and that that release can not be the last use of x).
release(x)
// rc(x) >= 1 (since we can not deallocate the pointer since we have a must use after x).
…
// rc(x) >= 1
use(x)

Thus we know that statically the calls to A(x), B(x) can together only
release rc(x) N times. Thus if we remove the inner retain, release pair:

// rc(x) == N (for some N).
retain(x)
// rc(x) == N+1
call A(x)
call B(x)
// rc(x) >= 1
…
// rc(x) >= 1
use(x)

We are still safe unless in the final … there are unbalanced retains,
releases which would have caused the program to blow up anyways even
before optimization occurred. The simplest form of must use is an
additional release that has not been paired up with any retain (if we
had paired the release with a retain and removed it we would not have
the additional use). This fits nicely into the ARC framework since
basically what you do is say that given any nested releases regardless
of what is in between, the inner release is known safe. This enables us to get
back the lost performance.

<rdar://problem/19023795>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@232351 91177308-0d34-0410-b5e6-96231b3b80d8
2015-03-16 07:02:36 +00:00

824 lines
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; RUN: opt -objc-arc -S < %s | FileCheck %s
%struct.__objcFastEnumerationState = type { i64, i8**, i64*, [5 x i64] }
@"\01L_OBJC_METH_VAR_NAME_" = internal global [43 x i8] c"countByEnumeratingWithState:objects:count:\00", section "__TEXT,__objc_methname,cstring_literals", align 1
@"\01L_OBJC_SELECTOR_REFERENCES_" = internal global i8* getelementptr inbounds ([43 x i8], [43 x i8]* @"\01L_OBJC_METH_VAR_NAME_", i64 0, i64 0), section "__DATA, __objc_selrefs, literal_pointers, no_dead_strip"
@g = common global i8* null, align 8
@"\01L_OBJC_IMAGE_INFO" = internal constant [2 x i32] [i32 0, i32 16], section "__DATA, __objc_imageinfo, regular, no_dead_strip"
declare void @callee()
declare i8* @returner()
declare i8* @objc_retainAutoreleasedReturnValue(i8*)
declare i8* @objc_retain(i8*)
declare void @objc_enumerationMutation(i8*)
declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i32, i1) nounwind
declare i8* @objc_msgSend(i8*, i8*, ...) nonlazybind
declare void @use(i8*)
declare void @objc_release(i8*)
declare i8* @def()
declare void @__crasher_block_invoke(i8* nocapture)
declare i8* @objc_retainBlock(i8*)
declare void @__crasher_block_invoke1(i8* nocapture)
!0 = !{}
; Delete a nested retain+release pair.
; CHECK-LABEL: define void @test0(
; CHECK: call i8* @objc_retain
; CHECK-NOT: @objc_retain
; CHECK: }
define void @test0(i8* %a) nounwind {
entry:
%state.ptr = alloca %struct.__objcFastEnumerationState, align 8
%items.ptr = alloca [16 x i8*], align 8
%0 = call i8* @objc_retain(i8* %a) nounwind
%tmp = bitcast %struct.__objcFastEnumerationState* %state.ptr to i8*
call void @llvm.memset.p0i8.i64(i8* %tmp, i8 0, i64 64, i32 8, i1 false)
%1 = call i8* @objc_retain(i8* %0) nounwind
%tmp2 = load i8*, i8** @"\01L_OBJC_SELECTOR_REFERENCES_", align 8
%call = call i64 bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to i64 (i8*, i8*, %struct.__objcFastEnumerationState*, [16 x i8*]*, i64)*)(i8* %1, i8* %tmp2, %struct.__objcFastEnumerationState* %state.ptr, [16 x i8*]* %items.ptr, i64 16)
%iszero = icmp eq i64 %call, 0
br i1 %iszero, label %forcoll.empty, label %forcoll.loopinit
forcoll.loopinit:
%mutationsptr.ptr = getelementptr inbounds %struct.__objcFastEnumerationState, %struct.__objcFastEnumerationState* %state.ptr, i64 0, i32 2
%mutationsptr = load i64*, i64** %mutationsptr.ptr, align 8
%forcoll.initial-mutations = load i64, i64* %mutationsptr, align 8
%stateitems.ptr = getelementptr inbounds %struct.__objcFastEnumerationState, %struct.__objcFastEnumerationState* %state.ptr, i64 0, i32 1
br label %forcoll.loopbody.outer
forcoll.loopbody.outer:
%forcoll.count.ph = phi i64 [ %call, %forcoll.loopinit ], [ %call6, %forcoll.refetch ]
%tmp7 = icmp ugt i64 %forcoll.count.ph, 1
%umax = select i1 %tmp7, i64 %forcoll.count.ph, i64 1
br label %forcoll.loopbody
forcoll.loopbody:
%forcoll.index = phi i64 [ 0, %forcoll.loopbody.outer ], [ %4, %forcoll.notmutated ]
%mutationsptr3 = load i64*, i64** %mutationsptr.ptr, align 8
%statemutations = load i64, i64* %mutationsptr3, align 8
%2 = icmp eq i64 %statemutations, %forcoll.initial-mutations
br i1 %2, label %forcoll.notmutated, label %forcoll.mutated
forcoll.mutated:
call void @objc_enumerationMutation(i8* %1)
br label %forcoll.notmutated
forcoll.notmutated:
%stateitems = load i8**, i8*** %stateitems.ptr, align 8
%currentitem.ptr = getelementptr i8*, i8** %stateitems, i64 %forcoll.index
%3 = load i8*, i8** %currentitem.ptr, align 8
call void @use(i8* %3)
%4 = add i64 %forcoll.index, 1
%exitcond = icmp eq i64 %4, %umax
br i1 %exitcond, label %forcoll.refetch, label %forcoll.loopbody
forcoll.refetch:
%tmp5 = load i8*, i8** @"\01L_OBJC_SELECTOR_REFERENCES_", align 8
%call6 = call i64 bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to i64 (i8*, i8*, %struct.__objcFastEnumerationState*, [16 x i8*]*, i64)*)(i8* %1, i8* %tmp5, %struct.__objcFastEnumerationState* %state.ptr, [16 x i8*]* %items.ptr, i64 16)
%5 = icmp eq i64 %call6, 0
br i1 %5, label %forcoll.empty, label %forcoll.loopbody.outer
forcoll.empty:
call void @objc_release(i8* %1) nounwind
call void @objc_release(i8* %0) nounwind, !clang.imprecise_release !0
ret void
}
; Delete a nested retain+release pair.
; CHECK-LABEL: define void @test2(
; CHECK: call i8* @objc_retain
; CHECK-NOT: @objc_retain
; CHECK: }
define void @test2() nounwind {
entry:
%state.ptr = alloca %struct.__objcFastEnumerationState, align 8
%items.ptr = alloca [16 x i8*], align 8
%call = call i8* @returner()
%0 = call i8* @objc_retainAutoreleasedReturnValue(i8* %call) nounwind
%tmp = bitcast %struct.__objcFastEnumerationState* %state.ptr to i8*
call void @llvm.memset.p0i8.i64(i8* %tmp, i8 0, i64 64, i32 8, i1 false)
%1 = call i8* @objc_retain(i8* %0) nounwind
%tmp2 = load i8*, i8** @"\01L_OBJC_SELECTOR_REFERENCES_", align 8
%call3 = call i64 bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to i64 (i8*, i8*, %struct.__objcFastEnumerationState*, [16 x i8*]*, i64)*)(i8* %1, i8* %tmp2, %struct.__objcFastEnumerationState* %state.ptr, [16 x i8*]* %items.ptr, i64 16)
%iszero = icmp eq i64 %call3, 0
br i1 %iszero, label %forcoll.empty, label %forcoll.loopinit
forcoll.loopinit:
%mutationsptr.ptr = getelementptr inbounds %struct.__objcFastEnumerationState, %struct.__objcFastEnumerationState* %state.ptr, i64 0, i32 2
%mutationsptr = load i64*, i64** %mutationsptr.ptr, align 8
%forcoll.initial-mutations = load i64, i64* %mutationsptr, align 8
%stateitems.ptr = getelementptr inbounds %struct.__objcFastEnumerationState, %struct.__objcFastEnumerationState* %state.ptr, i64 0, i32 1
br label %forcoll.loopbody.outer
forcoll.loopbody.outer:
%forcoll.count.ph = phi i64 [ %call3, %forcoll.loopinit ], [ %call7, %forcoll.refetch ]
%tmp8 = icmp ugt i64 %forcoll.count.ph, 1
%umax = select i1 %tmp8, i64 %forcoll.count.ph, i64 1
br label %forcoll.loopbody
forcoll.loopbody:
%forcoll.index = phi i64 [ 0, %forcoll.loopbody.outer ], [ %4, %forcoll.notmutated ]
%mutationsptr4 = load i64*, i64** %mutationsptr.ptr, align 8
%statemutations = load i64, i64* %mutationsptr4, align 8
%2 = icmp eq i64 %statemutations, %forcoll.initial-mutations
br i1 %2, label %forcoll.notmutated, label %forcoll.mutated
forcoll.mutated:
call void @objc_enumerationMutation(i8* %1)
br label %forcoll.notmutated
forcoll.notmutated:
%stateitems = load i8**, i8*** %stateitems.ptr, align 8
%currentitem.ptr = getelementptr i8*, i8** %stateitems, i64 %forcoll.index
%3 = load i8*, i8** %currentitem.ptr, align 8
call void @use(i8* %3)
%4 = add i64 %forcoll.index, 1
%exitcond = icmp eq i64 %4, %umax
br i1 %exitcond, label %forcoll.refetch, label %forcoll.loopbody
forcoll.refetch:
%tmp6 = load i8*, i8** @"\01L_OBJC_SELECTOR_REFERENCES_", align 8
%call7 = call i64 bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to i64 (i8*, i8*, %struct.__objcFastEnumerationState*, [16 x i8*]*, i64)*)(i8* %1, i8* %tmp6, %struct.__objcFastEnumerationState* %state.ptr, [16 x i8*]* %items.ptr, i64 16)
%5 = icmp eq i64 %call7, 0
br i1 %5, label %forcoll.empty, label %forcoll.loopbody.outer
forcoll.empty:
call void @objc_release(i8* %1) nounwind
call void @objc_release(i8* %0) nounwind, !clang.imprecise_release !0
ret void
}
; Delete a nested retain+release pair.
; CHECK-LABEL: define void @test4(
; CHECK: call i8* @objc_retain
; CHECK-NOT: @objc_retain
; CHECK: }
define void @test4() nounwind {
entry:
%state.ptr = alloca %struct.__objcFastEnumerationState, align 8
%items.ptr = alloca [16 x i8*], align 8
%tmp = load i8*, i8** @g, align 8
%0 = call i8* @objc_retain(i8* %tmp) nounwind
%tmp2 = bitcast %struct.__objcFastEnumerationState* %state.ptr to i8*
call void @llvm.memset.p0i8.i64(i8* %tmp2, i8 0, i64 64, i32 8, i1 false)
%1 = call i8* @objc_retain(i8* %0) nounwind
%tmp4 = load i8*, i8** @"\01L_OBJC_SELECTOR_REFERENCES_", align 8
%call = call i64 bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to i64 (i8*, i8*, %struct.__objcFastEnumerationState*, [16 x i8*]*, i64)*)(i8* %1, i8* %tmp4, %struct.__objcFastEnumerationState* %state.ptr, [16 x i8*]* %items.ptr, i64 16)
%iszero = icmp eq i64 %call, 0
br i1 %iszero, label %forcoll.empty, label %forcoll.loopinit
forcoll.loopinit:
%mutationsptr.ptr = getelementptr inbounds %struct.__objcFastEnumerationState, %struct.__objcFastEnumerationState* %state.ptr, i64 0, i32 2
%mutationsptr = load i64*, i64** %mutationsptr.ptr, align 8
%forcoll.initial-mutations = load i64, i64* %mutationsptr, align 8
%stateitems.ptr = getelementptr inbounds %struct.__objcFastEnumerationState, %struct.__objcFastEnumerationState* %state.ptr, i64 0, i32 1
br label %forcoll.loopbody.outer
forcoll.loopbody.outer:
%forcoll.count.ph = phi i64 [ %call, %forcoll.loopinit ], [ %call8, %forcoll.refetch ]
%tmp9 = icmp ugt i64 %forcoll.count.ph, 1
%umax = select i1 %tmp9, i64 %forcoll.count.ph, i64 1
br label %forcoll.loopbody
forcoll.loopbody:
%forcoll.index = phi i64 [ 0, %forcoll.loopbody.outer ], [ %4, %forcoll.notmutated ]
%mutationsptr5 = load i64*, i64** %mutationsptr.ptr, align 8
%statemutations = load i64, i64* %mutationsptr5, align 8
%2 = icmp eq i64 %statemutations, %forcoll.initial-mutations
br i1 %2, label %forcoll.notmutated, label %forcoll.mutated
forcoll.mutated:
call void @objc_enumerationMutation(i8* %1)
br label %forcoll.notmutated
forcoll.notmutated:
%stateitems = load i8**, i8*** %stateitems.ptr, align 8
%currentitem.ptr = getelementptr i8*, i8** %stateitems, i64 %forcoll.index
%3 = load i8*, i8** %currentitem.ptr, align 8
call void @use(i8* %3)
%4 = add i64 %forcoll.index, 1
%exitcond = icmp eq i64 %4, %umax
br i1 %exitcond, label %forcoll.refetch, label %forcoll.loopbody
forcoll.refetch:
%tmp7 = load i8*, i8** @"\01L_OBJC_SELECTOR_REFERENCES_", align 8
%call8 = call i64 bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to i64 (i8*, i8*, %struct.__objcFastEnumerationState*, [16 x i8*]*, i64)*)(i8* %1, i8* %tmp7, %struct.__objcFastEnumerationState* %state.ptr, [16 x i8*]* %items.ptr, i64 16)
%5 = icmp eq i64 %call8, 0
br i1 %5, label %forcoll.empty, label %forcoll.loopbody.outer
forcoll.empty:
call void @objc_release(i8* %1) nounwind
call void @objc_release(i8* %0) nounwind, !clang.imprecise_release !0
ret void
}
; Delete a nested retain+release pair.
; CHECK-LABEL: define void @test5(
; CHECK: call i8* @objc_retain
; CHECK-NOT: @objc_retain
; CHECK: }
define void @test5() nounwind {
entry:
%state.ptr = alloca %struct.__objcFastEnumerationState, align 8
%items.ptr = alloca [16 x i8*], align 8
%call = call i8* @returner()
%0 = call i8* @objc_retainAutoreleasedReturnValue(i8* %call) nounwind
%tmp = bitcast %struct.__objcFastEnumerationState* %state.ptr to i8*
call void @llvm.memset.p0i8.i64(i8* %tmp, i8 0, i64 64, i32 8, i1 false)
%1 = call i8* @objc_retain(i8* %0) nounwind
%tmp2 = load i8*, i8** @"\01L_OBJC_SELECTOR_REFERENCES_", align 8
%call3 = call i64 bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to i64 (i8*, i8*, %struct.__objcFastEnumerationState*, [16 x i8*]*, i64)*)(i8* %1, i8* %tmp2, %struct.__objcFastEnumerationState* %state.ptr, [16 x i8*]* %items.ptr, i64 16)
%iszero = icmp eq i64 %call3, 0
br i1 %iszero, label %forcoll.empty, label %forcoll.loopinit
forcoll.loopinit:
%mutationsptr.ptr = getelementptr inbounds %struct.__objcFastEnumerationState, %struct.__objcFastEnumerationState* %state.ptr, i64 0, i32 2
%mutationsptr = load i64*, i64** %mutationsptr.ptr, align 8
%forcoll.initial-mutations = load i64, i64* %mutationsptr, align 8
%stateitems.ptr = getelementptr inbounds %struct.__objcFastEnumerationState, %struct.__objcFastEnumerationState* %state.ptr, i64 0, i32 1
br label %forcoll.loopbody.outer
forcoll.loopbody.outer:
%forcoll.count.ph = phi i64 [ %call3, %forcoll.loopinit ], [ %call7, %forcoll.refetch ]
%tmp8 = icmp ugt i64 %forcoll.count.ph, 1
%umax = select i1 %tmp8, i64 %forcoll.count.ph, i64 1
br label %forcoll.loopbody
forcoll.loopbody:
%forcoll.index = phi i64 [ 0, %forcoll.loopbody.outer ], [ %4, %forcoll.notmutated ]
%mutationsptr4 = load i64*, i64** %mutationsptr.ptr, align 8
%statemutations = load i64, i64* %mutationsptr4, align 8
%2 = icmp eq i64 %statemutations, %forcoll.initial-mutations
br i1 %2, label %forcoll.notmutated, label %forcoll.mutated
forcoll.mutated:
call void @objc_enumerationMutation(i8* %1)
br label %forcoll.notmutated
forcoll.notmutated:
%stateitems = load i8**, i8*** %stateitems.ptr, align 8
%currentitem.ptr = getelementptr i8*, i8** %stateitems, i64 %forcoll.index
%3 = load i8*, i8** %currentitem.ptr, align 8
call void @use(i8* %3)
%4 = add i64 %forcoll.index, 1
%exitcond = icmp eq i64 %4, %umax
br i1 %exitcond, label %forcoll.refetch, label %forcoll.loopbody
forcoll.refetch:
%tmp6 = load i8*, i8** @"\01L_OBJC_SELECTOR_REFERENCES_", align 8
%call7 = call i64 bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to i64 (i8*, i8*, %struct.__objcFastEnumerationState*, [16 x i8*]*, i64)*)(i8* %1, i8* %tmp6, %struct.__objcFastEnumerationState* %state.ptr, [16 x i8*]* %items.ptr, i64 16)
%5 = icmp eq i64 %call7, 0
br i1 %5, label %forcoll.empty, label %forcoll.loopbody.outer
forcoll.empty:
call void @objc_release(i8* %1) nounwind
call void @objc_release(i8* %0) nounwind, !clang.imprecise_release !0
ret void
}
; We handle this now due to the fact that a release just needs a post dominating
; use.
;
; CHECK-LABEL: define void @test6(
; CHECK: call i8* @objc_retain
; CHECK-NOT: @objc_retain
; CHECK: }
define void @test6() nounwind {
entry:
%state.ptr = alloca %struct.__objcFastEnumerationState, align 8
%items.ptr = alloca [16 x i8*], align 8
%call = call i8* @returner()
%0 = call i8* @objc_retainAutoreleasedReturnValue(i8* %call) nounwind
%tmp = bitcast %struct.__objcFastEnumerationState* %state.ptr to i8*
call void @llvm.memset.p0i8.i64(i8* %tmp, i8 0, i64 64, i32 8, i1 false)
%1 = call i8* @objc_retain(i8* %0) nounwind
%tmp2 = load i8*, i8** @"\01L_OBJC_SELECTOR_REFERENCES_", align 8
%call3 = call i64 bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to i64 (i8*, i8*, %struct.__objcFastEnumerationState*, [16 x i8*]*, i64)*)(i8* %1, i8* %tmp2, %struct.__objcFastEnumerationState* %state.ptr, [16 x i8*]* %items.ptr, i64 16)
%iszero = icmp eq i64 %call3, 0
br i1 %iszero, label %forcoll.empty, label %forcoll.loopinit
forcoll.loopinit:
%mutationsptr.ptr = getelementptr inbounds %struct.__objcFastEnumerationState, %struct.__objcFastEnumerationState* %state.ptr, i64 0, i32 2
%mutationsptr = load i64*, i64** %mutationsptr.ptr, align 8
%forcoll.initial-mutations = load i64, i64* %mutationsptr, align 8
%stateitems.ptr = getelementptr inbounds %struct.__objcFastEnumerationState, %struct.__objcFastEnumerationState* %state.ptr, i64 0, i32 1
br label %forcoll.loopbody.outer
forcoll.loopbody.outer:
%forcoll.count.ph = phi i64 [ %call3, %forcoll.loopinit ], [ %call7, %forcoll.refetch ]
%tmp8 = icmp ugt i64 %forcoll.count.ph, 1
%umax = select i1 %tmp8, i64 %forcoll.count.ph, i64 1
br label %forcoll.loopbody
forcoll.loopbody:
%forcoll.index = phi i64 [ 0, %forcoll.loopbody.outer ], [ %4, %forcoll.notmutated ]
%mutationsptr4 = load i64*, i64** %mutationsptr.ptr, align 8
%statemutations = load i64, i64* %mutationsptr4, align 8
%2 = icmp eq i64 %statemutations, %forcoll.initial-mutations
br i1 %2, label %forcoll.notmutated, label %forcoll.mutated
forcoll.mutated:
call void @objc_enumerationMutation(i8* %1)
br label %forcoll.notmutated
forcoll.notmutated:
%stateitems = load i8**, i8*** %stateitems.ptr, align 8
%currentitem.ptr = getelementptr i8*, i8** %stateitems, i64 %forcoll.index
%3 = load i8*, i8** %currentitem.ptr, align 8
call void @use(i8* %3)
%4 = add i64 %forcoll.index, 1
%exitcond = icmp eq i64 %4, %umax
br i1 %exitcond, label %forcoll.refetch, label %forcoll.loopbody
forcoll.refetch:
%tmp6 = load i8*, i8** @"\01L_OBJC_SELECTOR_REFERENCES_", align 8
%call7 = call i64 bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to i64 (i8*, i8*, %struct.__objcFastEnumerationState*, [16 x i8*]*, i64)*)(i8* %1, i8* %tmp6, %struct.__objcFastEnumerationState* %state.ptr, [16 x i8*]* %items.ptr, i64 16)
%5 = icmp eq i64 %call7, 0
br i1 %5, label %forcoll.empty, label %forcoll.loopbody.outer
forcoll.empty:
call void @objc_release(i8* %1) nounwind
call void @callee()
call void @objc_release(i8* %0) nounwind, !clang.imprecise_release !0
ret void
}
; TODO: Delete a nested retain+release pair.
; The optimizer currently can't do this, because isn't isn't sophisticated enough in
; reasnoning about nesting.
; CHECK-LABEL: define void @test7(
; CHECK: call i8* @objc_retain
; CHECK: @objc_retain
; CHECK: }
define void @test7() nounwind {
entry:
%state.ptr = alloca %struct.__objcFastEnumerationState, align 8
%items.ptr = alloca [16 x i8*], align 8
%call = call i8* @returner()
%0 = call i8* @objc_retainAutoreleasedReturnValue(i8* %call) nounwind
call void @callee()
%tmp = bitcast %struct.__objcFastEnumerationState* %state.ptr to i8*
call void @llvm.memset.p0i8.i64(i8* %tmp, i8 0, i64 64, i32 8, i1 false)
%1 = call i8* @objc_retain(i8* %0) nounwind
%tmp2 = load i8*, i8** @"\01L_OBJC_SELECTOR_REFERENCES_", align 8
%call3 = call i64 bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to i64 (i8*, i8*, %struct.__objcFastEnumerationState*, [16 x i8*]*, i64)*)(i8* %1, i8* %tmp2, %struct.__objcFastEnumerationState* %state.ptr, [16 x i8*]* %items.ptr, i64 16)
%iszero = icmp eq i64 %call3, 0
br i1 %iszero, label %forcoll.empty, label %forcoll.loopinit
forcoll.loopinit:
%mutationsptr.ptr = getelementptr inbounds %struct.__objcFastEnumerationState, %struct.__objcFastEnumerationState* %state.ptr, i64 0, i32 2
%mutationsptr = load i64*, i64** %mutationsptr.ptr, align 8
%forcoll.initial-mutations = load i64, i64* %mutationsptr, align 8
%stateitems.ptr = getelementptr inbounds %struct.__objcFastEnumerationState, %struct.__objcFastEnumerationState* %state.ptr, i64 0, i32 1
br label %forcoll.loopbody.outer
forcoll.loopbody.outer:
%forcoll.count.ph = phi i64 [ %call3, %forcoll.loopinit ], [ %call7, %forcoll.refetch ]
%tmp8 = icmp ugt i64 %forcoll.count.ph, 1
%umax = select i1 %tmp8, i64 %forcoll.count.ph, i64 1
br label %forcoll.loopbody
forcoll.loopbody:
%forcoll.index = phi i64 [ 0, %forcoll.loopbody.outer ], [ %4, %forcoll.notmutated ]
%mutationsptr4 = load i64*, i64** %mutationsptr.ptr, align 8
%statemutations = load i64, i64* %mutationsptr4, align 8
%2 = icmp eq i64 %statemutations, %forcoll.initial-mutations
br i1 %2, label %forcoll.notmutated, label %forcoll.mutated
forcoll.mutated:
call void @objc_enumerationMutation(i8* %1)
br label %forcoll.notmutated
forcoll.notmutated:
%stateitems = load i8**, i8*** %stateitems.ptr, align 8
%currentitem.ptr = getelementptr i8*, i8** %stateitems, i64 %forcoll.index
%3 = load i8*, i8** %currentitem.ptr, align 8
call void @use(i8* %3)
%4 = add i64 %forcoll.index, 1
%exitcond = icmp eq i64 %4, %umax
br i1 %exitcond, label %forcoll.refetch, label %forcoll.loopbody
forcoll.refetch:
%tmp6 = load i8*, i8** @"\01L_OBJC_SELECTOR_REFERENCES_", align 8
%call7 = call i64 bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to i64 (i8*, i8*, %struct.__objcFastEnumerationState*, [16 x i8*]*, i64)*)(i8* %1, i8* %tmp6, %struct.__objcFastEnumerationState* %state.ptr, [16 x i8*]* %items.ptr, i64 16)
%5 = icmp eq i64 %call7, 0
br i1 %5, label %forcoll.empty, label %forcoll.loopbody.outer
forcoll.empty:
call void @objc_release(i8* %1) nounwind
call void @callee()
call void @objc_release(i8* %0) nounwind, !clang.imprecise_release !0
ret void
}
; Delete a nested retain+release pair.
; CHECK-LABEL: define void @test8(
; CHECK: call i8* @objc_retain
; CHECK-NOT: @objc_retain
; CHECK: }
define void @test8() nounwind {
entry:
%state.ptr = alloca %struct.__objcFastEnumerationState, align 8
%items.ptr = alloca [16 x i8*], align 8
%call = call i8* @returner()
%0 = call i8* @objc_retainAutoreleasedReturnValue(i8* %call) nounwind
%tmp = bitcast %struct.__objcFastEnumerationState* %state.ptr to i8*
call void @llvm.memset.p0i8.i64(i8* %tmp, i8 0, i64 64, i32 8, i1 false)
%1 = call i8* @objc_retain(i8* %0) nounwind
%tmp2 = load i8*, i8** @"\01L_OBJC_SELECTOR_REFERENCES_", align 8
%call3 = call i64 bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to i64 (i8*, i8*, %struct.__objcFastEnumerationState*, [16 x i8*]*, i64)*)(i8* %1, i8* %tmp2, %struct.__objcFastEnumerationState* %state.ptr, [16 x i8*]* %items.ptr, i64 16)
%iszero = icmp eq i64 %call3, 0
br i1 %iszero, label %forcoll.empty, label %forcoll.loopinit
forcoll.loopinit:
%mutationsptr.ptr = getelementptr inbounds %struct.__objcFastEnumerationState, %struct.__objcFastEnumerationState* %state.ptr, i64 0, i32 2
%mutationsptr = load i64*, i64** %mutationsptr.ptr, align 8
%forcoll.initial-mutations = load i64, i64* %mutationsptr, align 8
%stateitems.ptr = getelementptr inbounds %struct.__objcFastEnumerationState, %struct.__objcFastEnumerationState* %state.ptr, i64 0, i32 1
br label %forcoll.loopbody.outer
forcoll.loopbody.outer:
%forcoll.count.ph = phi i64 [ %call3, %forcoll.loopinit ], [ %call7, %forcoll.refetch ]
%tmp8 = icmp ugt i64 %forcoll.count.ph, 1
%umax = select i1 %tmp8, i64 %forcoll.count.ph, i64 1
br label %forcoll.loopbody
forcoll.loopbody:
%forcoll.index = phi i64 [ 0, %forcoll.loopbody.outer ], [ %4, %forcoll.next ]
%mutationsptr4 = load i64*, i64** %mutationsptr.ptr, align 8
%statemutations = load i64, i64* %mutationsptr4, align 8
%2 = icmp eq i64 %statemutations, %forcoll.initial-mutations
br i1 %2, label %forcoll.notmutated, label %forcoll.mutated
forcoll.mutated:
call void @objc_enumerationMutation(i8* %1)
br label %forcoll.notmutated
forcoll.notmutated:
%stateitems = load i8**, i8*** %stateitems.ptr, align 8
%currentitem.ptr = getelementptr i8*, i8** %stateitems, i64 %forcoll.index
%3 = load i8*, i8** %currentitem.ptr, align 8
%tobool = icmp eq i8* %3, null
br i1 %tobool, label %forcoll.next, label %if.then
if.then:
call void @callee()
br label %forcoll.next
forcoll.next:
%4 = add i64 %forcoll.index, 1
%exitcond = icmp eq i64 %4, %umax
br i1 %exitcond, label %forcoll.refetch, label %forcoll.loopbody
forcoll.refetch:
%tmp6 = load i8*, i8** @"\01L_OBJC_SELECTOR_REFERENCES_", align 8
%call7 = call i64 bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to i64 (i8*, i8*, %struct.__objcFastEnumerationState*, [16 x i8*]*, i64)*)(i8* %1, i8* %tmp6, %struct.__objcFastEnumerationState* %state.ptr, [16 x i8*]* %items.ptr, i64 16)
%5 = icmp eq i64 %call7, 0
br i1 %5, label %forcoll.empty, label %forcoll.loopbody.outer
forcoll.empty:
call void @objc_release(i8* %1) nounwind
call void @objc_release(i8* %0) nounwind, !clang.imprecise_release !0
ret void
}
; TODO: Delete a nested retain+release pair.
; The optimizer currently can't do this, because of a split loop backedge.
; See test9b for the same testcase without a split backedge.
; CHECK-LABEL: define void @test9(
; CHECK: call i8* @objc_retain
; CHECK: call i8* @objc_retain
; CHECK: call i8* @objc_retain
; CHECK: }
define void @test9() nounwind {
entry:
%state.ptr = alloca %struct.__objcFastEnumerationState, align 8
%items.ptr = alloca [16 x i8*], align 8
%call = call i8* @returner()
%0 = call i8* @objc_retainAutoreleasedReturnValue(i8* %call) nounwind
%call1 = call i8* @returner()
%1 = call i8* @objc_retainAutoreleasedReturnValue(i8* %call1) nounwind
%tmp = bitcast %struct.__objcFastEnumerationState* %state.ptr to i8*
call void @llvm.memset.p0i8.i64(i8* %tmp, i8 0, i64 64, i32 8, i1 false)
%2 = call i8* @objc_retain(i8* %0) nounwind
%tmp3 = load i8*, i8** @"\01L_OBJC_SELECTOR_REFERENCES_", align 8
%call4 = call i64 bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to i64 (i8*, i8*, %struct.__objcFastEnumerationState*, [16 x i8*]*, i64)*)(i8* %2, i8* %tmp3, %struct.__objcFastEnumerationState* %state.ptr, [16 x i8*]* %items.ptr, i64 16)
%iszero = icmp eq i64 %call4, 0
br i1 %iszero, label %forcoll.empty, label %forcoll.loopinit
forcoll.loopinit:
%mutationsptr.ptr = getelementptr inbounds %struct.__objcFastEnumerationState, %struct.__objcFastEnumerationState* %state.ptr, i64 0, i32 2
%mutationsptr = load i64*, i64** %mutationsptr.ptr, align 8
%forcoll.initial-mutations = load i64, i64* %mutationsptr, align 8
br label %forcoll.loopbody.outer
forcoll.loopbody.outer:
%forcoll.count.ph = phi i64 [ %call4, %forcoll.loopinit ], [ %call7, %forcoll.refetch ]
%tmp9 = icmp ugt i64 %forcoll.count.ph, 1
%umax = select i1 %tmp9, i64 %forcoll.count.ph, i64 1
br label %forcoll.loopbody
forcoll.loopbody:
%forcoll.index = phi i64 [ %phitmp, %forcoll.notmutated.forcoll.loopbody_crit_edge ], [ 1, %forcoll.loopbody.outer ]
%mutationsptr5 = load i64*, i64** %mutationsptr.ptr, align 8
%statemutations = load i64, i64* %mutationsptr5, align 8
%3 = icmp eq i64 %statemutations, %forcoll.initial-mutations
br i1 %3, label %forcoll.notmutated, label %forcoll.mutated
forcoll.mutated:
call void @objc_enumerationMutation(i8* %2)
br label %forcoll.notmutated
forcoll.notmutated:
%exitcond = icmp eq i64 %forcoll.index, %umax
br i1 %exitcond, label %forcoll.refetch, label %forcoll.notmutated.forcoll.loopbody_crit_edge
forcoll.notmutated.forcoll.loopbody_crit_edge:
%phitmp = add i64 %forcoll.index, 1
br label %forcoll.loopbody
forcoll.refetch:
%tmp6 = load i8*, i8** @"\01L_OBJC_SELECTOR_REFERENCES_", align 8
%call7 = call i64 bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to i64 (i8*, i8*, %struct.__objcFastEnumerationState*, [16 x i8*]*, i64)*)(i8* %2, i8* %tmp6, %struct.__objcFastEnumerationState* %state.ptr, [16 x i8*]* %items.ptr, i64 16)
%4 = icmp eq i64 %call7, 0
br i1 %4, label %forcoll.empty, label %forcoll.loopbody.outer
forcoll.empty:
call void @objc_release(i8* %2) nounwind
call void @objc_release(i8* %1) nounwind, !clang.imprecise_release !0
call void @objc_release(i8* %0) nounwind, !clang.imprecise_release !0
ret void
}
; Like test9, but without a split backedge. TODO: optimize this.
; CHECK-LABEL: define void @test9b(
; CHECK: call i8* @objc_retain
; CHECK: call i8* @objc_retain
; CHECK: @objc_retain
; CHECK: }
define void @test9b() nounwind {
entry:
%state.ptr = alloca %struct.__objcFastEnumerationState, align 8
%items.ptr = alloca [16 x i8*], align 8
%call = call i8* @returner()
%0 = call i8* @objc_retainAutoreleasedReturnValue(i8* %call) nounwind
%call1 = call i8* @returner()
%1 = call i8* @objc_retainAutoreleasedReturnValue(i8* %call1) nounwind
%tmp = bitcast %struct.__objcFastEnumerationState* %state.ptr to i8*
call void @llvm.memset.p0i8.i64(i8* %tmp, i8 0, i64 64, i32 8, i1 false)
%2 = call i8* @objc_retain(i8* %0) nounwind
%tmp3 = load i8*, i8** @"\01L_OBJC_SELECTOR_REFERENCES_", align 8
%call4 = call i64 bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to i64 (i8*, i8*, %struct.__objcFastEnumerationState*, [16 x i8*]*, i64)*)(i8* %2, i8* %tmp3, %struct.__objcFastEnumerationState* %state.ptr, [16 x i8*]* %items.ptr, i64 16)
%iszero = icmp eq i64 %call4, 0
br i1 %iszero, label %forcoll.empty, label %forcoll.loopinit
forcoll.loopinit:
%mutationsptr.ptr = getelementptr inbounds %struct.__objcFastEnumerationState, %struct.__objcFastEnumerationState* %state.ptr, i64 0, i32 2
%mutationsptr = load i64*, i64** %mutationsptr.ptr, align 8
%forcoll.initial-mutations = load i64, i64* %mutationsptr, align 8
br label %forcoll.loopbody.outer
forcoll.loopbody.outer:
%forcoll.count.ph = phi i64 [ %call4, %forcoll.loopinit ], [ %call7, %forcoll.refetch ]
%tmp9 = icmp ugt i64 %forcoll.count.ph, 1
%umax = select i1 %tmp9, i64 %forcoll.count.ph, i64 1
br label %forcoll.loopbody
forcoll.loopbody:
%forcoll.index = phi i64 [ %phitmp, %forcoll.notmutated ], [ 0, %forcoll.loopbody.outer ]
%mutationsptr5 = load i64*, i64** %mutationsptr.ptr, align 8
%statemutations = load i64, i64* %mutationsptr5, align 8
%3 = icmp eq i64 %statemutations, %forcoll.initial-mutations
br i1 %3, label %forcoll.notmutated, label %forcoll.mutated
forcoll.mutated:
call void @objc_enumerationMutation(i8* %2)
br label %forcoll.notmutated
forcoll.notmutated:
%phitmp = add i64 %forcoll.index, 1
%exitcond = icmp eq i64 %phitmp, %umax
br i1 %exitcond, label %forcoll.refetch, label %forcoll.loopbody
forcoll.refetch:
%tmp6 = load i8*, i8** @"\01L_OBJC_SELECTOR_REFERENCES_", align 8
%call7 = call i64 bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to i64 (i8*, i8*, %struct.__objcFastEnumerationState*, [16 x i8*]*, i64)*)(i8* %2, i8* %tmp6, %struct.__objcFastEnumerationState* %state.ptr, [16 x i8*]* %items.ptr, i64 16)
%4 = icmp eq i64 %call7, 0
br i1 %4, label %forcoll.empty, label %forcoll.loopbody.outer
forcoll.empty:
call void @objc_release(i8* %2) nounwind
call void @objc_release(i8* %1) nounwind, !clang.imprecise_release !0
call void @objc_release(i8* %0) nounwind, !clang.imprecise_release !0
ret void
}
; TODO: Delete a nested retain+release pair.
; The optimizer currently can't do this, because of a split loop backedge.
; See test10b for the same testcase without a split backedge.
; CHECK-LABEL: define void @test10(
; CHECK: call i8* @objc_retain
; CHECK: call i8* @objc_retain
; CHECK: call i8* @objc_retain
; CHECK: }
define void @test10() nounwind {
entry:
%state.ptr = alloca %struct.__objcFastEnumerationState, align 8
%items.ptr = alloca [16 x i8*], align 8
%call = call i8* @returner()
%0 = call i8* @objc_retainAutoreleasedReturnValue(i8* %call) nounwind
%call1 = call i8* @returner()
%1 = call i8* @objc_retainAutoreleasedReturnValue(i8* %call1) nounwind
call void @callee()
%tmp = bitcast %struct.__objcFastEnumerationState* %state.ptr to i8*
call void @llvm.memset.p0i8.i64(i8* %tmp, i8 0, i64 64, i32 8, i1 false)
%2 = call i8* @objc_retain(i8* %0) nounwind
%tmp3 = load i8*, i8** @"\01L_OBJC_SELECTOR_REFERENCES_", align 8
%call4 = call i64 bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to i64 (i8*, i8*, %struct.__objcFastEnumerationState*, [16 x i8*]*, i64)*)(i8* %2, i8* %tmp3, %struct.__objcFastEnumerationState* %state.ptr, [16 x i8*]* %items.ptr, i64 16)
%iszero = icmp eq i64 %call4, 0
br i1 %iszero, label %forcoll.empty, label %forcoll.loopinit
forcoll.loopinit:
%mutationsptr.ptr = getelementptr inbounds %struct.__objcFastEnumerationState, %struct.__objcFastEnumerationState* %state.ptr, i64 0, i32 2
%mutationsptr = load i64*, i64** %mutationsptr.ptr, align 8
%forcoll.initial-mutations = load i64, i64* %mutationsptr, align 8
br label %forcoll.loopbody.outer
forcoll.loopbody.outer:
%forcoll.count.ph = phi i64 [ %call4, %forcoll.loopinit ], [ %call7, %forcoll.refetch ]
%tmp9 = icmp ugt i64 %forcoll.count.ph, 1
%umax = select i1 %tmp9, i64 %forcoll.count.ph, i64 1
br label %forcoll.loopbody
forcoll.loopbody:
%forcoll.index = phi i64 [ %phitmp, %forcoll.notmutated.forcoll.loopbody_crit_edge ], [ 1, %forcoll.loopbody.outer ]
%mutationsptr5 = load i64*, i64** %mutationsptr.ptr, align 8
%statemutations = load i64, i64* %mutationsptr5, align 8
%3 = icmp eq i64 %statemutations, %forcoll.initial-mutations
br i1 %3, label %forcoll.notmutated, label %forcoll.mutated
forcoll.mutated:
call void @objc_enumerationMutation(i8* %2)
br label %forcoll.notmutated
forcoll.notmutated:
%exitcond = icmp eq i64 %forcoll.index, %umax
br i1 %exitcond, label %forcoll.refetch, label %forcoll.notmutated.forcoll.loopbody_crit_edge
forcoll.notmutated.forcoll.loopbody_crit_edge:
%phitmp = add i64 %forcoll.index, 1
br label %forcoll.loopbody
forcoll.refetch:
%tmp6 = load i8*, i8** @"\01L_OBJC_SELECTOR_REFERENCES_", align 8
%call7 = call i64 bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to i64 (i8*, i8*, %struct.__objcFastEnumerationState*, [16 x i8*]*, i64)*)(i8* %2, i8* %tmp6, %struct.__objcFastEnumerationState* %state.ptr, [16 x i8*]* %items.ptr, i64 16)
%4 = icmp eq i64 %call7, 0
br i1 %4, label %forcoll.empty, label %forcoll.loopbody.outer
forcoll.empty:
call void @objc_release(i8* %2) nounwind
call void @objc_release(i8* %1) nounwind, !clang.imprecise_release !0
call void @objc_release(i8* %0) nounwind, !clang.imprecise_release !0
ret void
}
; Like test10, but without a split backedge. TODO: optimize this.
; CHECK-LABEL: define void @test10b(
; CHECK: call i8* @objc_retain
; CHECK: call i8* @objc_retain
; CHECK: @objc_retain
; CHECK: }
define void @test10b() nounwind {
entry:
%state.ptr = alloca %struct.__objcFastEnumerationState, align 8
%items.ptr = alloca [16 x i8*], align 8
%call = call i8* @returner()
%0 = call i8* @objc_retainAutoreleasedReturnValue(i8* %call) nounwind
%call1 = call i8* @returner()
%1 = call i8* @objc_retainAutoreleasedReturnValue(i8* %call1) nounwind
call void @callee()
%tmp = bitcast %struct.__objcFastEnumerationState* %state.ptr to i8*
call void @llvm.memset.p0i8.i64(i8* %tmp, i8 0, i64 64, i32 8, i1 false)
%2 = call i8* @objc_retain(i8* %0) nounwind
%tmp3 = load i8*, i8** @"\01L_OBJC_SELECTOR_REFERENCES_", align 8
%call4 = call i64 bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to i64 (i8*, i8*, %struct.__objcFastEnumerationState*, [16 x i8*]*, i64)*)(i8* %2, i8* %tmp3, %struct.__objcFastEnumerationState* %state.ptr, [16 x i8*]* %items.ptr, i64 16)
%iszero = icmp eq i64 %call4, 0
br i1 %iszero, label %forcoll.empty, label %forcoll.loopinit
forcoll.loopinit:
%mutationsptr.ptr = getelementptr inbounds %struct.__objcFastEnumerationState, %struct.__objcFastEnumerationState* %state.ptr, i64 0, i32 2
%mutationsptr = load i64*, i64** %mutationsptr.ptr, align 8
%forcoll.initial-mutations = load i64, i64* %mutationsptr, align 8
br label %forcoll.loopbody.outer
forcoll.loopbody.outer:
%forcoll.count.ph = phi i64 [ %call4, %forcoll.loopinit ], [ %call7, %forcoll.refetch ]
%tmp9 = icmp ugt i64 %forcoll.count.ph, 1
%umax = select i1 %tmp9, i64 %forcoll.count.ph, i64 1
br label %forcoll.loopbody
forcoll.loopbody:
%forcoll.index = phi i64 [ %phitmp, %forcoll.notmutated ], [ 0, %forcoll.loopbody.outer ]
%mutationsptr5 = load i64*, i64** %mutationsptr.ptr, align 8
%statemutations = load i64, i64* %mutationsptr5, align 8
%3 = icmp eq i64 %statemutations, %forcoll.initial-mutations
br i1 %3, label %forcoll.notmutated, label %forcoll.mutated
forcoll.mutated:
call void @objc_enumerationMutation(i8* %2)
br label %forcoll.notmutated
forcoll.notmutated:
%phitmp = add i64 %forcoll.index, 1
%exitcond = icmp eq i64 %phitmp, %umax
br i1 %exitcond, label %forcoll.refetch, label %forcoll.loopbody
forcoll.refetch:
%tmp6 = load i8*, i8** @"\01L_OBJC_SELECTOR_REFERENCES_", align 8
%call7 = call i64 bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to i64 (i8*, i8*, %struct.__objcFastEnumerationState*, [16 x i8*]*, i64)*)(i8* %2, i8* %tmp6, %struct.__objcFastEnumerationState* %state.ptr, [16 x i8*]* %items.ptr, i64 16)
%4 = icmp eq i64 %call7, 0
br i1 %4, label %forcoll.empty, label %forcoll.loopbody.outer
forcoll.empty:
call void @objc_release(i8* %2) nounwind
call void @objc_release(i8* %1) nounwind, !clang.imprecise_release !0
call void @objc_release(i8* %0) nounwind, !clang.imprecise_release !0
ret void
}
; Pointers to strong pointers can obscure provenance relationships. Be conservative
; in the face of escaping pointers. rdar://12150909.
%struct.__block_d = type { i64, i64 }
@_NSConcreteStackBlock = external global i8*
@__block_d_tmp = external hidden constant { i64, i64, i8*, i8*, i8*, i8* }
@__block_d_tmp5 = external hidden constant { i64, i64, i8*, i8*, i8*, i8* }
; CHECK-LABEL: define void @test11(
; CHECK: tail call i8* @objc_retain(i8* %call) [[NUW:#[0-9]+]]
; CHECK: tail call i8* @objc_retain(i8* %call) [[NUW]]
; CHECK: call void @objc_release(i8* %call) [[NUW]], !clang.imprecise_release !0
; CHECK: }
define void @test11() {
entry:
%block = alloca <{ i8*, i32, i32, i8*, %struct.__block_d*, i8* }>, align 8
%block9 = alloca <{ i8*, i32, i32, i8*, %struct.__block_d*, i8* }>, align 8
%call = call i8* @def(), !clang.arc.no_objc_arc_exceptions !0
%foo = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_d*, i8* }>, <{ i8*, i32, i32, i8*, %struct.__block_d*, i8* }>* %block, i64 0, i32 5
%block.isa = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_d*, i8* }>, <{ i8*, i32, i32, i8*, %struct.__block_d*, i8* }>* %block, i64 0, i32 0
store i8* bitcast (i8** @_NSConcreteStackBlock to i8*), i8** %block.isa, align 8
%block.flags = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_d*, i8* }>, <{ i8*, i32, i32, i8*, %struct.__block_d*, i8* }>* %block, i64 0, i32 1
store i32 1107296256, i32* %block.flags, align 8
%block.reserved = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_d*, i8* }>, <{ i8*, i32, i32, i8*, %struct.__block_d*, i8* }>* %block, i64 0, i32 2
store i32 0, i32* %block.reserved, align 4
%block.invoke = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_d*, i8* }>, <{ i8*, i32, i32, i8*, %struct.__block_d*, i8* }>* %block, i64 0, i32 3
store i8* bitcast (void (i8*)* @__crasher_block_invoke to i8*), i8** %block.invoke, align 8
%block.d = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_d*, i8* }>, <{ i8*, i32, i32, i8*, %struct.__block_d*, i8* }>* %block, i64 0, i32 4
store %struct.__block_d* bitcast ({ i64, i64, i8*, i8*, i8*, i8* }* @__block_d_tmp to %struct.__block_d*), %struct.__block_d** %block.d, align 8
%foo2 = tail call i8* @objc_retain(i8* %call) nounwind
store i8* %foo2, i8** %foo, align 8
%foo4 = bitcast <{ i8*, i32, i32, i8*, %struct.__block_d*, i8* }>* %block to i8*
%foo5 = call i8* @objc_retainBlock(i8* %foo4) nounwind
call void @use(i8* %foo5), !clang.arc.no_objc_arc_exceptions !0
call void @objc_release(i8* %foo5) nounwind
%strongdestroy = load i8*, i8** %foo, align 8
call void @objc_release(i8* %strongdestroy) nounwind, !clang.imprecise_release !0
%foo10 = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_d*, i8* }>, <{ i8*, i32, i32, i8*, %struct.__block_d*, i8* }>* %block9, i64 0, i32 5
%block.isa11 = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_d*, i8* }>, <{ i8*, i32, i32, i8*, %struct.__block_d*, i8* }>* %block9, i64 0, i32 0
store i8* bitcast (i8** @_NSConcreteStackBlock to i8*), i8** %block.isa11, align 8
%block.flags12 = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_d*, i8* }>, <{ i8*, i32, i32, i8*, %struct.__block_d*, i8* }>* %block9, i64 0, i32 1
store i32 1107296256, i32* %block.flags12, align 8
%block.reserved13 = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_d*, i8* }>, <{ i8*, i32, i32, i8*, %struct.__block_d*, i8* }>* %block9, i64 0, i32 2
store i32 0, i32* %block.reserved13, align 4
%block.invoke14 = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_d*, i8* }>, <{ i8*, i32, i32, i8*, %struct.__block_d*, i8* }>* %block9, i64 0, i32 3
store i8* bitcast (void (i8*)* @__crasher_block_invoke1 to i8*), i8** %block.invoke14, align 8
%block.d15 = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_d*, i8* }>, <{ i8*, i32, i32, i8*, %struct.__block_d*, i8* }>* %block9, i64 0, i32 4
store %struct.__block_d* bitcast ({ i64, i64, i8*, i8*, i8*, i8* }* @__block_d_tmp5 to %struct.__block_d*), %struct.__block_d** %block.d15, align 8
%foo18 = call i8* @objc_retain(i8* %call) nounwind
store i8* %call, i8** %foo10, align 8
%foo20 = bitcast <{ i8*, i32, i32, i8*, %struct.__block_d*, i8* }>* %block9 to i8*
%foo21 = call i8* @objc_retainBlock(i8* %foo20) nounwind
call void @use(i8* %foo21), !clang.arc.no_objc_arc_exceptions !0
call void @objc_release(i8* %foo21) nounwind
%strongdestroy25 = load i8*, i8** %foo10, align 8
call void @objc_release(i8* %strongdestroy25) nounwind, !clang.imprecise_release !0
call void @objc_release(i8* %call) nounwind, !clang.imprecise_release !0
ret void
}
; CHECK: attributes [[NUW]] = { nounwind }
; CHECK: attributes #1 = { nonlazybind }
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