caio/clang-p2996
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
Files
1daf2994de49d1ecba4bee4e6842aa8a564cbc96
clang-p2996/clang/test/CodeGenObjC/arc-blocks.m
Aaron Ballman 0f1c1be196 [clang] Remove rdar links; NFC 
We have a new policy in place making links to private resources
something we try to avoid in source and test files. Normally, we'd
organically switch to the new policy rather than make a sweeping change
across a project. However, Clang is in a somewhat special circumstance
currently: recently, I've had several new contributors run into rdar
links around test code which their patch was changing the behavior of.
This turns out to be a surprisingly bad experience, especially for
newer folks, for a handful of reasons: not understanding what the link
is and feeling intimidated by it, wondering whether their changes are
actually breaking something important to a downstream in some way,
having to hunt down strangers not involved with the patch to impose on
them for help, accidental pressure from asking for potentially private
IP to be made public, etc. Because folks run into these links entirely
by chance (through fixing bugs or working on new features), there's not
really a set of problematic links to focus on -- all of the links have
basically the same potential for causing these problems. As a result,
this is an omnibus patch to remove all such links.

This was not a mechanical change; it was done by manually searching for
rdar, radar, radr, and other variants to find all the various
problematic links. From there, I tried to retain or reword the
surrounding comments so that we would lose as little context as
possible. However, because most links were just a plain link with no
supporting context, the majority of the changes are simple removals.

Differential Review: https://reviews.llvm.org/D158071
2023-08-28 12:13:42 -04:00

701 lines
33 KiB
Objective-C
Raw Blame History

// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -emit-llvm -fblocks -fobjc-arc -fobjc-runtime-has-weak -O2 -disable-llvm-passes -o - %s | FileCheck -check-prefix=CHECK -check-prefix=CHECK-HEAP -check-prefix=CHECK-COMMON %s
// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -emit-llvm -fblocks -fobjc-arc -fobjc-runtime-has-weak -O2 -disable-llvm-passes -fobjc-avoid-heapify-local-blocks -o - %s | FileCheck -check-prefix=CHECK -check-prefix=CHECK-NOHEAP -check-prefix=CHECK-COMMON %s
// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -emit-llvm -fblocks -fobjc-arc -fobjc-runtime-has-weak -o - %s | FileCheck -check-prefix=CHECK-UNOPT -check-prefix=CHECK-COMMON %s
// CHECK-COMMON: @[[BLOCK_DESCRIPTOR_TMP44:.*]] = linkonce_odr hidden unnamed_addr constant { i64, i64, ptr, ptr, ptr, i64 } { i64 0, i64 40, ptr @__copy_helper_block_8_32s, ptr @__destroy_helper_block_8_32s, ptr @{{.*}}, i64 256 }, align 8
// CHECK-COMMON: @[[BLOCK_DESCRIPTOR_TMP9:.*]] = linkonce_odr hidden unnamed_addr constant { i64, i64, ptr, ptr, ptr, i64 } { i64 0, i64 40, ptr @__copy_helper_block_8_32r, ptr @__destroy_helper_block_8_32r, ptr @{{.*}}, i64 16 }, align 8
// CHECK-COMMON: @[[BLOCK_DESCRIPTOR_TMP46:.*]] = linkonce_odr hidden unnamed_addr constant { i64, i64, ptr, ptr, ptr, ptr } { i64 0, i64 48, ptr @__copy_helper_block_8_32s, ptr @__destroy_helper_block_8_32s, ptr @{{.*}}, ptr @{{.*}} }, align 8
// CHECK-COMMON: @[[BLOCK_DESCRIPTOR_TMP48:.*]] = linkonce_odr hidden unnamed_addr constant { i64, i64, ptr, ptr, ptr, i64 } { i64 0, i64 40, ptr @__copy_helper_block_8_32b, ptr @__destroy_helper_block_8_32s, ptr @{{.*}}, i64 256 }, align 8
// Check that no copy/dispose helpers are emitted for this block.
// CHECK-COMMON: @[[BLOCK_DESCRIPTOR_TMP10:.*]] = linkonce_odr hidden unnamed_addr constant { i64, i64, ptr, ptr } { i64 0, i64 40, ptr @{{.*}}, ptr @{{.*}} }, align 8
// This shouldn't crash.
void test0(id (^maker)(void)) {
maker();
}
int (^test1(int x))(void) {
// CHECK-LABEL: define{{.*}} ptr @test1(
// CHECK: [[X:%.*]] = alloca i32,
// CHECK-NEXT: [[BLOCK:%.*]] = alloca [[BLOCK_T:<{.*}>]],
// CHECK-NEXT: store i32 {{%.*}}, ptr [[X]]
// CHECK: [[T2:%.*]] = call ptr @llvm.objc.retainBlock(ptr [[BLOCK]]) [[NUW:#[0-9]+]]
// CHECK-NEXT: [[T5:%.*]] = tail call ptr @llvm.objc.autoreleaseReturnValue(ptr [[T2]]) [[NUW]]
// CHECK-NEXT: ret ptr [[T5]]
return ^{ return x; };
}
void test2(id x) {
// CHECK-LABEL: define{{.*}} void @test2(
// CHECK: [[X:%.*]] = alloca ptr,
// CHECK-NEXT: [[BLOCK:%.*]] = alloca [[BLOCK_T:<{.*}>]],
// CHECK-NEXT: [[PARM:%.*]] = call ptr @llvm.objc.retain(ptr {{%.*}})
// CHECK-NEXT: store ptr [[PARM]], ptr [[X]]
// CHECK: [[SLOT:%.*]] = getelementptr inbounds [[BLOCK_T]], ptr [[BLOCK]], i32 0, i32 5
// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr [[X]],
// CHECK-NEXT: [[T1:%.*]] = call ptr @llvm.objc.retain(ptr [[T0]])
// CHECK-NEXT: store ptr [[T1]], ptr [[SLOT]],
// CHECK-NEXT: call void @test2_helper(
// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr [[SLOT]]
// CHECK-NEXT: call void @llvm.objc.release(ptr [[T0]]) [[NUW]], !clang.imprecise_release
// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr [[X]]
// CHECK-NEXT: call void @llvm.objc.release(ptr [[T0]]) [[NUW]], !clang.imprecise_release
// CHECK-NEXT: ret void
extern void test2_helper(id (^)(void));
test2_helper(^{ return x; });
// CHECK: define linkonce_odr hidden void @__copy_helper_block_8_32s(ptr noundef %0, ptr noundef %1) unnamed_addr #{{[0-9]+}} {
// CHECK: [[SRC:%.*]] = load ptr, ptr
// CHECK-NEXT: [[DST:%.*]] = load ptr, ptr
// CHECK-NEXT: [[T0:%.*]] = getelementptr inbounds [[BLOCK_T]], ptr [[SRC]], i32 0, i32 5
// CHECK-NEXT: [[T1:%.*]] = load ptr, ptr [[T0]]
// CHECK-NEXT: [[T2:%.*]] = call ptr @llvm.objc.retain(ptr [[T1]]) [[NUW]]
// CHECK-NEXT: ret void
// CHECK: define linkonce_odr hidden void @__destroy_helper_block_8_32s(ptr noundef %0) unnamed_addr #{{[0-9]+}} {
// CHECK: [[T0:%.*]] = load ptr, ptr
// CHECK-NEXT: [[T2:%.*]] = getelementptr inbounds [[BLOCK_T]], ptr [[T0]], i32 0, i32 5
// CHECK-NEXT: [[T3:%.*]] = load ptr, ptr [[T2]]
// CHECK-NEXT: call void @llvm.objc.release(ptr [[T3]])
// CHECK-NEXT: ret void
}
void test3(void (^sink)(id*)) {
__strong id strong;
sink(&strong);
// CHECK-LABEL: define{{.*}} void @test3(
// CHECK: [[SINK:%.*]] = alloca ptr
// CHECK-NEXT: [[STRONG:%.*]] = alloca ptr
// CHECK-NEXT: [[TEMP:%.*]] = alloca ptr
// CHECK-NEXT: call ptr @llvm.objc.retain(
// CHECK-NEXT: store ptr {{%.*}}, ptr [[SINK]]
// CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 8, ptr [[STRONG]])
// CHECK-NEXT: store ptr null, ptr [[STRONG]]
// CHECK-NEXT: [[BLOCK:%.*]] = load ptr, ptr [[SINK]]
// CHECK-NEXT: getelementptr
// CHECK-NEXT: [[V:%.*]] = load ptr, ptr [[STRONG]]
// CHECK-NEXT: store ptr [[V]], ptr [[TEMP]]
// CHECK-NEXT: [[F0:%.*]] = load ptr, ptr
// CHECK-NEXT: call void [[F0]](ptr noundef [[BLOCK]], ptr noundef [[TEMP]])
// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr [[TEMP]]
// CHECK-NEXT: [[T1:%.*]] = call ptr @llvm.objc.retain(ptr [[T0]])
// CHECK-NEXT: call void (...) @llvm.objc.clang.arc.use(ptr [[V]]) [[NUW]]
// CHECK-NEXT: [[T2:%.*]] = load ptr, ptr [[STRONG]]
// CHECK-NEXT: store ptr [[T1]], ptr [[STRONG]]
// CHECK-NEXT: call void @llvm.objc.release(ptr [[T2]])
// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr [[STRONG]]
// CHECK-NEXT: call void @llvm.objc.release(ptr [[T0]])
// CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 8, ptr [[STRONG]])
// CHECK-NEXT: load ptr, ptr [[SINK]]
// CHECK-NEXT: call void @llvm.objc.release
// CHECK-NEXT: ret void
}
void test4(void) {
id test4_source(void);
void test4_helper(void (^)(void));
__block id var = test4_source();
test4_helper(^{ var = 0; });
// CHECK-LABEL: define{{.*}} void @test4()
// CHECK: [[VAR:%.*]] = alloca [[BYREF_T:%.*]],
// CHECK-NEXT: [[BLOCK:%.*]] = alloca [[BLOCK_T:<{.*}>]],
// CHECK: [[T0:%.*]] = getelementptr inbounds [[BYREF_T]], ptr [[VAR]], i32 0, i32 2
// 0x02000000 - has copy/dispose helpers strong
// CHECK-NEXT: store i32 838860800, ptr [[T0]]
// CHECK: [[SLOT:%.*]] = getelementptr inbounds [[BYREF_T]], ptr [[VAR]], i32 0, i32 6
// CHECK-NEXT: [[T0:%.*]] = call ptr @test4_source() [ "clang.arc.attachedcall"(ptr @llvm.objc.retainAutoreleasedReturnValue) ]
// CHECK-NEXT: call void (...) @llvm.objc.clang.arc.noop.use(ptr [[T0]])
// CHECK-NEXT: store ptr [[T0]], ptr [[SLOT]]
// CHECK-NEXT: [[SLOT:%.*]] = getelementptr inbounds [[BYREF_T]], ptr [[VAR]], i32 0, i32 6
// 0x42800000 - has signature, copy/dispose helpers, as well as BLOCK_HAS_EXTENDED_LAYOUT
// CHECK: store i32 -1040187392,
// CHECK: store ptr [[VAR]], ptr
// CHECK: call void @test4_helper(
// CHECK: call void @_Block_object_dispose(ptr [[VAR]], i32 8)
// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr [[SLOT]]
// CHECK-NEXT: call void @llvm.objc.release(ptr [[T0]])
// CHECK: ret void
// CHECK-LABEL: define internal void @__Block_byref_object_copy_(ptr noundef %0, ptr noundef %1) #{{[0-9]+}} {
// CHECK: [[T0:%.*]] = getelementptr inbounds [[BYREF_T]], ptr {{%.*}}, i32 0, i32 6
// CHECK-NEXT: load ptr, ptr
// CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds [[BYREF_T]], ptr {{%.*}}, i32 0, i32 6
// CHECK-NEXT: [[T2:%.*]] = load ptr, ptr [[T1]]
// CHECK-NEXT: store ptr [[T2]], ptr [[T0]]
// CHECK-NEXT: store ptr null, ptr [[T1]]
// CHECK-LABEL: define internal void @__Block_byref_object_dispose_(ptr noundef %0) #{{[0-9]+}} {
// CHECK: [[T0:%.*]] = getelementptr inbounds [[BYREF_T]], ptr {{%.*}}, i32 0, i32 6
// CHECK-NEXT: [[T1:%.*]] = load ptr, ptr [[T0]]
// CHECK-NEXT: call void @llvm.objc.release(ptr [[T1]])
// CHECK-LABEL: define internal void @__test4_block_invoke
// CHECK: [[SLOT:%.*]] = getelementptr inbounds {{.*}}, i32 0, i32 6
// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr [[SLOT]], align 8
// CHECK-NEXT: store ptr null, ptr [[SLOT]],
// CHECK-NEXT: call void @llvm.objc.release(ptr [[T0]])
// CHECK-NEXT: ret void
// CHECK-LABEL: define linkonce_odr hidden void @__copy_helper_block_8_32r(ptr noundef %0, ptr noundef %1) unnamed_addr #{{[0-9]+}} {
// CHECK: call void @_Block_object_assign(ptr {{%.*}}, ptr {{%.*}}, i32 8)
// CHECK-LABEL: define linkonce_odr hidden void @__destroy_helper_block_8_32r(ptr noundef %0) unnamed_addr #{{[0-9]+}} {
// CHECK: call void @_Block_object_dispose(ptr {{%.*}}, i32 8)
}
void test5(void) {
extern id test5_source(void);
void test5_helper(void (^)(void));
__unsafe_unretained id var = test5_source();
test5_helper(^{ (void) var; });
// CHECK-LABEL: define{{.*}} void @test5()
// CHECK: [[VAR:%.*]] = alloca ptr
// CHECK-NEXT: [[BLOCK:%.*]] = alloca [[BLOCK_T:<{.*}>]],
// CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 8, ptr [[VAR]])
// CHECK: [[T1:%.*]] = call ptr @test5_source() [ "clang.arc.attachedcall"(ptr @llvm.objc.retainAutoreleasedReturnValue) ]
// CHECK-NEXT: call void (...) @llvm.objc.clang.arc.noop.use(ptr [[T1]])
// CHECK-NEXT: store ptr [[T1]], ptr [[VAR]],
// CHECK-NEXT: call void @llvm.objc.release(ptr [[T1]])
// 0x40800000 - has signature but no copy/dispose, as well as BLOCK_HAS_EXTENDED_LAYOUT
// CHECK: store i32 -1073741824, ptr
// CHECK: [[CAPTURE:%.*]] = getelementptr inbounds [[BLOCK_T]], ptr [[BLOCK]], i32 0, i32 5
// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr [[VAR]]
// CHECK-NEXT: store ptr [[T0]], ptr [[CAPTURE]]
// CHECK: call void @test5_helper
// CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 8, ptr [[VAR]])
// CHECK-NEXT: ret void
}
void test6(void) {
id test6_source(void);
void test6_helper(void (^)(void));
__block __weak id var = test6_source();
test6_helper(^{ var = 0; });
// CHECK-LABEL: define{{.*}} void @test6()
// CHECK: [[VAR:%.*]] = alloca [[BYREF_T:%.*]],
// CHECK-NEXT: [[BLOCK:%.*]] = alloca [[BLOCK_T:<{.*}>]],
// CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 48, ptr [[VAR]])
// CHECK: [[T0:%.*]] = getelementptr inbounds [[BYREF_T]], ptr [[VAR]], i32 0, i32 2
// 0x02000000 - has copy/dispose helpers weak
// CHECK-NEXT: store i32 1107296256, ptr [[T0]]
// CHECK: [[SLOT:%.*]] = getelementptr inbounds [[BYREF_T]], ptr [[VAR]], i32 0, i32 6
// CHECK-NEXT: [[T1:%.*]] = call ptr @test6_source() [ "clang.arc.attachedcall"(ptr @llvm.objc.retainAutoreleasedReturnValue) ]
// CHECK-NEXT: call void (...) @llvm.objc.clang.arc.noop.use(ptr [[T1]])
// CHECK-NEXT: call ptr @llvm.objc.initWeak(ptr [[SLOT]], ptr [[T1]])
// CHECK-NEXT: call void @llvm.objc.release(ptr [[T1]])
// CHECK-NEXT: [[SLOT:%.*]] = getelementptr inbounds [[BYREF_T]], ptr [[VAR]], i32 0, i32 6
// 0x42800000 - has signature, copy/dispose helpers, as well as BLOCK_HAS_EXTENDED_LAYOUT
// CHECK: store i32 -1040187392,
// CHECK: %[[BLOCK_DESCRIPTOR:.*]] = getelementptr inbounds <{ ptr, i32, i32, ptr, ptr, ptr }>, ptr %{{.*}}, i32 0, i32 4
// CHECK: store ptr @[[BLOCK_DESCRIPTOR_TMP9]], ptr %[[BLOCK_DESCRIPTOR]], align 8
// CHECK: store ptr [[VAR]], ptr
// CHECK: call void @test6_helper(
// CHECK: call void @_Block_object_dispose(ptr [[VAR]], i32 8)
// CHECK-NEXT: call void @llvm.objc.destroyWeak(ptr [[SLOT]])
// CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 48, ptr [[VAR]])
// CHECK-NEXT: ret void
// CHECK-LABEL: define internal void @__Block_byref_object_copy_.{{[0-9]+}}(ptr noundef %0, ptr noundef %1) #{{[0-9]+}} {
// CHECK: [[T0:%.*]] = getelementptr inbounds [[BYREF_T]], ptr {{%.*}}, i32 0, i32 6
// CHECK-NEXT: load ptr, ptr
// CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds [[BYREF_T]], ptr {{%.*}}, i32 0, i32 6
// CHECK-NEXT: call void @llvm.objc.moveWeak(ptr [[T0]], ptr [[T1]])
// CHECK-LABEL: define internal void @__Block_byref_object_dispose_.{{[0-9]+}}(ptr noundef %0) #{{[0-9]+}} {
// CHECK: [[T0:%.*]] = getelementptr inbounds [[BYREF_T]], ptr {{%.*}}, i32 0, i32 6
// CHECK-NEXT: call void @llvm.objc.destroyWeak(ptr [[T0]])
// CHECK-LABEL: define internal void @__test6_block_invoke
// CHECK: [[SLOT:%.*]] = getelementptr inbounds {{.*}}, i32 0, i32 6
// CHECK-NEXT: call ptr @llvm.objc.storeWeak(ptr [[SLOT]], ptr null)
// CHECK-NEXT: ret void
}
void test7(void) {
id test7_source(void);
void test7_helper(void (^)(void));
void test7_consume(id);
__weak id var = test7_source();
test7_helper(^{ test7_consume(var); });
// CHECK-LABEL: define{{.*}} void @test7()
// CHECK: [[VAR:%.*]] = alloca ptr,
// CHECK-NEXT: [[BLOCK:%.*]] = alloca [[BLOCK_T:<{.*}>]],
// CHECK: [[T1:%.*]] = call ptr @test7_source() [ "clang.arc.attachedcall"(ptr @llvm.objc.retainAutoreleasedReturnValue) ]
// CHECK-NEXT: call void (...) @llvm.objc.clang.arc.noop.use(ptr [[T1]])
// CHECK-NEXT: call ptr @llvm.objc.initWeak(ptr [[VAR]], ptr [[T1]])
// CHECK-NEXT: call void @llvm.objc.release(ptr [[T1]])
// 0x42800000 - has signature, copy/dispose helpers, as well as BLOCK_HAS_EXTENDED_LAYOUT
// CHECK: store i32 -1040187392,
// CHECK: [[SLOT:%.*]] = getelementptr inbounds [[BLOCK_T]], ptr [[BLOCK]], i32 0, i32 5
// CHECK-NEXT: call void @llvm.objc.copyWeak(ptr [[SLOT]], ptr [[VAR]])
// CHECK: call void @test7_helper(
// CHECK-NEXT: call void @llvm.objc.destroyWeak(ptr {{%.*}})
// CHECK-NEXT: call void @llvm.objc.destroyWeak(ptr [[VAR]])
// CHECK: ret void
// CHECK-LABEL: define internal void @__test7_block_invoke
// CHECK: [[SLOT:%.*]] = getelementptr inbounds [[BLOCK_T]], ptr {{%.*}}, i32 0, i32 5
// CHECK-NEXT: [[T0:%.*]] = call ptr @llvm.objc.loadWeakRetained(ptr [[SLOT]])
// CHECK-NEXT: call void @test7_consume(ptr noundef [[T0]])
// CHECK-NEXT: call void @llvm.objc.release(ptr [[T0]])
// CHECK: ret void
// CHECK-LABEL: define linkonce_odr hidden void @__copy_helper_block_8_32w(ptr noundef %0, ptr noundef %1) unnamed_addr #{{[0-9]+}} {
// CHECK: getelementptr
// CHECK-NEXT: getelementptr
// CHECK-NEXT: call void @llvm.objc.copyWeak(
// CHECK-LABEL: define linkonce_odr hidden void @__destroy_helper_block_8_32w(ptr noundef %0) unnamed_addr #{{[0-9]+}} {
// CHECK: getelementptr
// CHECK-NEXT: call void @llvm.objc.destroyWeak(
}
@interface Test8 @end
@implementation Test8
- (void) test {
// CHECK: define internal void @"\01-[Test8 test]"
// CHECK: [[SELF:%.*]] = alloca ptr,
// CHECK-NEXT: alloca ptr
// CHECK-NEXT: [[BLOCK:%.*]] = alloca [[BLOCK_T:<{.*}>]],
// CHECK: store
// CHECK-NEXT: store
// CHECK: [[T0:%.*]] = getelementptr inbounds [[BLOCK_T]], ptr [[BLOCK]], i32 0, i32 5
// CHECK-NEXT: [[T1:%.*]] = load ptr, ptr [[SELF]],
// CHECK-NEXT: store ptr [[T1]], ptr [[T0]]
// CHECK: call void @test8_helper(
// CHECK-NEXT: [[T2:%.*]] = load ptr, ptr [[T0]]
// CHECK-NEXT: call void (...) @llvm.objc.clang.arc.use(ptr [[T2]])
// CHECK: ret void
extern void test8_helper(void (^)(void));
test8_helper(^{ (void) self; });
}
@end
id test9(void) {
typedef id __attribute__((ns_returns_retained)) blocktype(void);
extern void test9_consume_block(blocktype^);
return ^blocktype {
extern id test9_produce(void);
return test9_produce();
}();
// CHECK-LABEL: define{{.*}} ptr @test9(
// CHECK: load ptr, ptr getelementptr
// CHECK-NEXT: call ptr
// CHECK-NEXT: tail call ptr @llvm.objc.autoreleaseReturnValue
// CHECK-NEXT: ret ptr
// CHECK: call ptr @test9_produce() [ "clang.arc.attachedcall"(ptr @llvm.objc.retainAutoreleasedReturnValue) ]
// CHECK-NEXT: call void (...) @llvm.objc.clang.arc.noop.use(
// CHECK-NEXT: ret ptr
}
// Test that we correctly initialize __block variables
// when the initialization captures the variable.
void test10a(void) {
__block void (^block)(void) = ^{ block(); };
// CHECK-LABEL: define{{.*}} void @test10a()
// CHECK: [[BYREF:%.*]] = alloca [[BYREF_T:%.*]],
// CHECK-NOHEAP: [[BLOCK1:%.*]] = alloca <{ ptr, i32, i32, ptr, ptr, ptr }>, align 8
// Zero-initialization before running the initializer.
// CHECK: [[T0:%.*]] = getelementptr inbounds [[BYREF_T]], ptr [[BYREF]], i32 0, i32 6
// CHECK-NEXT: store ptr null, ptr [[T0]], align 8
// Run the initializer as an assignment.
// CHECK-HEAP: [[T1:%.*]] = call ptr @llvm.objc.retainBlock(ptr {{%.*}})
// CHECK: [[T3:%.*]] = getelementptr inbounds [[BYREF_T]], ptr [[BYREF]], i32 0, i32 1
// CHECK-NEXT: [[T4:%.*]] = load ptr, ptr [[T3]]
// CHECK-NEXT: [[T5:%.*]] = getelementptr inbounds [[BYREF_T]], ptr [[T4]], i32 0, i32 6
// CHECK-NEXT: [[T6:%.*]] = load ptr, ptr [[T5]], align 8
// CHECK-HEAP-NEXT: store ptr {{%.*}}, ptr [[T5]], align 8
// CHECK-NOHEAP-NEXT: store ptr [[BLOCK1]], ptr [[T5]], align 8
// CHECK-NEXT: call void @llvm.objc.release(ptr [[T6]])
// Destroy at end of function.
// CHECK-NEXT: [[SLOT:%.*]] = getelementptr inbounds [[BYREF_T]], ptr [[BYREF]], i32 0, i32 6
// CHECK-NEXT: call void @_Block_object_dispose(ptr [[BYREF]], i32 8)
// CHECK-NEXT: [[T1:%.*]] = load ptr, ptr [[SLOT]]
// CHECK-NEXT: call void @llvm.objc.release(ptr [[T1]])
// CHECK: ret void
}
// do this copy and dispose with objc_retainBlock/release instead of
// _Block_object_assign/destroy. We can also use _Block_object_assign/destroy
// with BLOCK_FIELD_IS_BLOCK as long as we don't pass BLOCK_BYREF_CALLER.
// CHECK-LABEL: define internal void @__Block_byref_object_copy_.{{[0-9]+}}(ptr noundef %0, ptr noundef %1) #{{[0-9]+}} {
// CHECK: [[D0:%.*]] = load ptr, ptr {{%.*}}
// CHECK-NEXT: [[D2:%.*]] = getelementptr inbounds [[BYREF_T]], ptr [[D0]], i32 0, i32 6
// CHECK-NEXT: [[S0:%.*]] = load ptr, ptr {{%.*}}
// CHECK-NEXT: [[S2:%.*]] = getelementptr inbounds [[BYREF_T]], ptr [[S0]], i32 0, i32 6
// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr [[S2]], align 8
// CHECK-NEXT: [[T2:%.*]] = call ptr @llvm.objc.retainBlock(ptr [[T0]])
// CHECK-NEXT: store ptr [[T2]], ptr [[D2]], align 8
// CHECK: ret void
// CHECK-LABEL: define internal void @__Block_byref_object_dispose_.{{[0-9]+}}(ptr noundef %0) #{{[0-9]+}} {
// CHECK: [[T0:%.*]] = load ptr, ptr {{%.*}}
// CHECK-NEXT: [[T2:%.*]] = getelementptr inbounds [[BYREF_T]], ptr [[T0]], i32 0, i32 6
// CHECK-NEXT: [[T3:%.*]] = load ptr, ptr [[T2]]
// CHECK-NEXT: call void @llvm.objc.release(ptr [[T3]])
// CHECK-NEXT: ret void
// Test that we correctly assign to __block variables when the
// assignment captures the variable.
void test10b(void) {
__block void (^block)(void);
block = ^{ block(); };
// CHECK-LABEL: define{{.*}} void @test10b()
// CHECK: [[BYREF:%.*]] = alloca [[BYREF_T:%.*]],
// CHECK-NOHEAP: [[BLOCK3:%.*]] = alloca <{ ptr, i32, i32, ptr, ptr, ptr }>, align 8
// Zero-initialize.
// CHECK: [[T0:%.*]] = getelementptr inbounds [[BYREF_T]], ptr [[BYREF]], i32 0, i32 6
// CHECK-NEXT: store ptr null, ptr [[T0]], align 8
// CHECK-NEXT: [[SLOT:%.*]] = getelementptr inbounds [[BYREF_T]], ptr [[BYREF]], i32 0, i32 6
// The assignment.
// CHECK-HEAP: [[T1:%.*]] = call ptr @llvm.objc.retainBlock(ptr {{%.*}})
// CHECK: [[T3:%.*]] = getelementptr inbounds [[BYREF_T]], ptr [[BYREF]], i32 0, i32 1
// CHECK-NEXT: [[T4:%.*]] = load ptr, ptr [[T3]]
// CHECK-NEXT: [[T5:%.*]] = getelementptr inbounds [[BYREF_T]], ptr [[T4]], i32 0, i32 6
// CHECK-NEXT: [[T6:%.*]] = load ptr, ptr [[T5]], align 8
// CHECK-HEAP-NEXT: store ptr {{%.*}}, ptr [[T5]], align 8
// CHECK-NOHEAP-NEXT: store ptr [[BLOCK3]], ptr [[T5]], align 8
// CHECK-NEXT: call void @llvm.objc.release(ptr [[T6]])
// Destroy at end of function.
// CHECK-NEXT: call void @_Block_object_dispose(ptr [[BYREF]], i32 8)
// CHECK-NEXT: [[T1:%.*]] = load ptr, ptr [[SLOT]]
// CHECK-NEXT: call void @llvm.objc.release(ptr [[T1]])
// CHECK: ret void
}
void test11_helper(id);
void test11a(void) {
int x;
test11_helper(^{ (void) x; });
// CHECK-LABEL: define{{.*}} void @test11a()
// CHECK: [[X:%.*]] = alloca i32, align 4
// CHECK-NEXT: [[BLOCK:%.*]] = alloca [[BLOCK_T:<{.*}>]], align 8
// CHECK: [[T2:%.*]] = call ptr @llvm.objc.retainBlock(ptr [[BLOCK]])
// CHECK-NEXT: call void @test11_helper(ptr noundef [[T2]])
// CHECK-NEXT: call void @llvm.objc.release(ptr [[T2]])
// CHECK: ret void
}
void test11b(void) {
int x;
id b = ^{ (void) x; };
// CHECK-LABEL: define{{.*}} void @test11b()
// CHECK: [[X:%.*]] = alloca i32, align 4
// CHECK-NEXT: [[B:%.*]] = alloca ptr, align 8
// CHECK-NEXT: [[BLOCK:%.*]] = alloca [[BLOCK_T:<{.*}>]], align 8
// CHECK: [[T2:%.*]] = call ptr @llvm.objc.retainBlock(ptr [[BLOCK]])
// CHECK-NEXT: store ptr [[T2]], ptr [[B]], align 8
// CHECK-NEXT: [[T5:%.*]] = load ptr, ptr [[B]]
// CHECK-NEXT: call void @llvm.objc.release(ptr [[T5]])
// CHECK: ret void
}
@interface Test12
@property (strong) void(^ablock)(void);
@property (nonatomic, strong) void(^nblock)(void);
@end
@implementation Test12
@synthesize ablock, nblock;
// CHECK: define internal ptr @"\01-[Test12 ablock]"(
// CHECK: call ptr @objc_getProperty(ptr noundef {{%.*}}, ptr noundef {{%.*}}, i64 noundef {{%.*}}, i1 noundef zeroext true)
// CHECK: define internal void @"\01-[Test12 setAblock:]"(
// CHECK: call void @objc_setProperty(ptr noundef {{%.*}}, ptr noundef {{%.*}}, i64 noundef {{%.*}}, ptr noundef {{%.*}}, i1 noundef zeroext true, i1 noundef zeroext true)
// CHECK: define internal ptr @"\01-[Test12 nblock]"(
// CHECK: %add.ptr = getelementptr inbounds i8, ptr %0, i64 %ivar
// CHECK: define internal void @"\01-[Test12 setNblock:]"(
// CHECK: call void @objc_setProperty(ptr noundef {{%.*}}, ptr noundef {{%.*}}, i64 noundef {{%.*}}, ptr noundef {{%.*}}, i1 noundef zeroext false, i1 noundef zeroext true)
@end
void test13(id x) {
extern void test13_helper(id);
extern void test13_use(void(^)(void));
void (^b)(void) = (x ? ^{test13_helper(x);} : 0);
test13_use(b);
// CHECK-LABEL: define{{.*}} void @test13(
// CHECK: [[X:%.*]] = alloca ptr, align 8
// CHECK-NEXT: [[B:%.*]] = alloca ptr, align 8
// CHECK-NEXT: [[BLOCK:%.*]] = alloca [[BLOCK_T:.*]], align 8
// CHECK-NEXT: [[CLEANUP_ACTIVE:%.*]] = alloca i1
// CHECK-NEXT: [[COND_CLEANUP_SAVE:%.*]] = alloca ptr,
// CHECK-NEXT: [[T0:%.*]] = call ptr @llvm.objc.retain(ptr {{%.*}})
// CHECK-NEXT: store ptr [[T0]], ptr [[X]], align 8
// CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 8, ptr [[B]])
// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr [[X]], align 8
// CHECK-NEXT: [[T1:%.*]] = icmp ne ptr [[T0]], null
// CHECK-NEXT: store i1 false, ptr [[CLEANUP_ACTIVE]]
// CHECK-NEXT: br i1 [[T1]],
// CHECK-NOT: br
// CHECK: [[CAPTURE:%.*]] = getelementptr inbounds [[BLOCK_T]], ptr [[BLOCK]], i32 0, i32 5
// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr [[X]], align 8
// CHECK-NEXT: [[T1:%.*]] = call ptr @llvm.objc.retain(ptr [[T0]])
// CHECK-NEXT: store ptr [[T1]], ptr [[CAPTURE]], align 8
// CHECK-NEXT: store i1 true, ptr [[CLEANUP_ACTIVE]]
// CHECK-NEXT: store ptr [[CAPTURE]], ptr [[COND_CLEANUP_SAVE]], align 8
// CHECK-NEXT: br label
// CHECK: br label
// CHECK: [[T0:%.*]] = phi ptr
// CHECK-NEXT: [[T2:%.*]] = call ptr @llvm.objc.retainBlock(ptr [[T0]])
// CHECK-NEXT: store ptr [[T2]], ptr [[B]], align 8
// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr [[B]], align 8
// CHECK-NEXT: call void @test13_use(ptr noundef [[T0]])
// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr [[B]]
// CHECK-NEXT: call void @llvm.objc.release(ptr [[T0]])
// CHECK-NEXT: [[T0:%.*]] = load i1, ptr [[CLEANUP_ACTIVE]]
// CHECK-NEXT: br i1 [[T0]]
// CHECK: [[V12:%.*]] = load ptr, ptr [[COND_CLEANUP_SAVE]], align 8
// CHECK: [[T0:%.*]] = load ptr, ptr [[V12]]
// CHECK-NEXT: call void @llvm.objc.release(ptr [[T0]])
// CHECK-NEXT: br label
// CHECK: call void @llvm.lifetime.end.p0(i64 8, ptr [[B]])
// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr [[X]]
// CHECK-NEXT: call void @llvm.objc.release(ptr [[T0]])
// CHECK-NEXT: ret void
}
void test14(void) {
void (^const x[1])(void) = { ^{} };
}
// Don't make invalid ASTs and crash.
void test15_helper(void (^block)(void), int x);
void test15(int a) {
test15_helper(^{ (void) a; }, ({ a; }));
}
void test16(void) {
void (^BLKVAR)(void) = ^{ BLKVAR(); };
// CHECK-LABEL: define{{.*}} void @test16(
// CHECK: [[BLKVAR:%.*]] = alloca ptr, align 8
// CHECK-NEXT: [[BLOCK:%.*]] = alloca [[BLOCK_T:<{.*}>]],
// CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 8, ptr [[BLKVAR]])
// CHECK-NEXT: store ptr null, ptr [[BLKVAR]], align 8
}
// This is an intentional exception to our conservative jump-scope
// checking for full-expressions containing block literals with
// non-trivial cleanups: if the block literal appears in the operand
// of a return statement, there's no need to extend its lifetime.
id (^test17(id self, int which))(void) {
switch (which) {
case 1: return ^{ return self; };
case 0: return ^{ return self; };
}
return (void*) 0;
}
// CHECK-LABEL: define{{.*}} ptr @test17(
// CHECK: [[RET:%.*]] = alloca ptr, align
// CHECK-NEXT: [[SELF:%.*]] = alloca ptr,
// CHECK: [[B0:%.*]] = alloca [[BLOCK:<.*>]], align
// CHECK: [[B1:%.*]] = alloca [[BLOCK]], align
// CHECK: [[T0:%.*]] = call ptr @llvm.objc.retain(ptr
// CHECK-NEXT: store ptr [[T0]], ptr [[SELF]], align
// CHECK-NOT: objc_retain
// CHECK-NOT: objc_release
// CHECK: [[CAPTURED:%.*]] = getelementptr inbounds [[BLOCK]], ptr [[B0]], i32 0, i32 5
// CHECK-NEXT: [[T1:%.*]] = load ptr, ptr [[SELF]], align
// CHECK-NEXT: [[T2:%.*]] = call ptr @llvm.objc.retain(ptr [[T1]])
// CHECK-NEXT: store ptr [[T2]], ptr [[CAPTURED]],
// CHECK-NEXT: [[T2:%.*]] = call ptr @llvm.objc.retainBlock(ptr [[B0]])
// CHECK-NEXT: store ptr [[T2]], ptr [[RET]]
// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr [[CAPTURED]]
// CHECK-NEXT: call void @llvm.objc.release(ptr [[T0]])
// CHECK-NEXT: store i32
// CHECK-NEXT: br label
// CHECK-NOT: objc_retain
// CHECK-NOT: objc_release
// CHECK: [[CAPTURED:%.*]] = getelementptr inbounds [[BLOCK]], ptr [[B1]], i32 0, i32 5
// CHECK-NEXT: [[T1:%.*]] = load ptr, ptr [[SELF]], align
// CHECK-NEXT: [[T2:%.*]] = call ptr @llvm.objc.retain(ptr [[T1]])
// CHECK-NEXT: store ptr [[T2]], ptr [[CAPTURED]],
// CHECK-NEXT: [[T2:%.*]] = call ptr @llvm.objc.retainBlock(ptr [[B1]])
// CHECK-NEXT: store ptr [[T2]], ptr [[RET]]
// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr [[CAPTURED]]
// CHECK-NEXT: call void @llvm.objc.release(ptr [[T0]])
// CHECK-NEXT: store i32
// CHECK-NEXT: br label
void test18(id x) {
// CHECK-UNOPT-LABEL: define{{.*}} void @test18(
// CHECK-UNOPT: [[X:%.*]] = alloca ptr,
// CHECK-UNOPT-NEXT: [[BLOCK:%.*]] = alloca [[BLOCK_T:<{.*}>]],
// CHECK-UNOPT-NEXT: store ptr null, ptr [[X]]
// CHECK-UNOPT-NEXT: call void @llvm.objc.storeStrong(ptr [[X]],
// CHECK-UNOPT: %[[BLOCK_DESCRIPTOR:.*]] = getelementptr inbounds [[BLOCK_T]], ptr [[BLOCK]], i32 0, i32 4
// CHECK-UNOPT: store ptr @[[BLOCK_DESCRIPTOR_TMP44]], ptr %[[BLOCK_DESCRIPTOR]], align 8
// CHECK-UNOPT: [[SLOT:%.*]] = getelementptr inbounds [[BLOCK_T]], ptr [[BLOCK]], i32 0, i32 5
// CHECK-UNOPT-NEXT: [[T0:%.*]] = load ptr, ptr [[X]],
// CHECK-UNOPT-NEXT: [[T1:%.*]] = call ptr @llvm.objc.retain(ptr [[T0]])
// CHECK-UNOPT-NEXT: store ptr [[T1]], ptr [[SLOT]],
// CHECK-UNOPT-NEXT: call void @test18_helper(
// CHECK-UNOPT-NEXT: call void @llvm.objc.storeStrong(ptr [[SLOT]], ptr null) [[NUW:#[0-9]+]]
// CHECK-UNOPT-NEXT: call void @llvm.objc.storeStrong(ptr [[X]], ptr null) [[NUW]]
// CHECK-UNOPT-NEXT: ret void
extern void test18_helper(id (^)(void));
test18_helper(^{ return x; });
}
// Ensure that we don't emit helper code in copy/dispose routines for variables
// that are const-captured.
void testUnsafeUnretainedLifetimeInCopyAndDestroyHelpers(id x, id y) {
id __unsafe_unretained unsafeObject = x;
(^ { testUnsafeUnretainedLifetimeInCopyAndDestroyHelpers(x, unsafeObject); })();
}
// CHECK-LABEL: define{{.*}} void @testUnsafeUnretainedLifetimeInCopyAndDestroyHelpers
// %[[BLOCK_DESCRIPTOR:.*]] = getelementptr inbounds <{ ptr, i32, i32, ptr, ptr, ptr, ptr }>, ptr %{{.*}}, i32 0, i32 4
// CHECK: store ptr @[[BLOCK_DESCRIPTOR_TMP46]], ptr %[[BLOCK_DESCRIPTOR]], align 8
// CHECK-LABEL: define internal void @__testUnsafeUnretainedLifetimeInCopyAndDestroyHelpers_block_invoke
// CHECK-UNOPT-LABEL: define internal void @__testUnsafeUnretainedLifetimeInCopyAndDestroyHelpers_block_invoke
void test19_sink(void (^)(int));
void test19(void (^b)(void)) {
// CHECK-LABEL: define{{.*}} void @test19(
// Prologue.
// CHECK: [[B:%.*]] = alloca ptr,
// CHECK-NEXT: [[BLOCK:%.*]] = alloca [[BLOCK_T:<{.*}>]],
// CHECK-NEXT: [[T1:%.*]] = call ptr @llvm.objc.retain(ptr {{%.*}})
// CHECK-NEXT: store ptr [[T1]], ptr [[B]]
// Block setup. We skip most of this. Note the bare retain.
// CHECK: %[[BLOCK_DESCRIPTOR:.*]] = getelementptr inbounds [[BLOCK_T]], ptr [[BLOCK]], i32 0, i32 4
// CHECK: store ptr @[[BLOCK_DESCRIPTOR_TMP48]], ptr %[[BLOCK_DESCRIPTOR]], align 8
// CHECK: [[SLOT:%.*]] = getelementptr inbounds [[BLOCK_T]], ptr [[BLOCK]], i32 0, i32 5
// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr [[B]],
// CHECK-NEXT: [[T2:%.*]] = call ptr @llvm.objc.retain(ptr [[T0]])
// CHECK-NEXT: store ptr [[T2]], ptr [[SLOT]],
// Call.
// CHECK-NEXT: call void @test19_sink(ptr noundef [[BLOCK]])
test19_sink(^(int x) { b(); });
// Block teardown.
// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr [[SLOT]]
// CHECK-NEXT: call void @llvm.objc.release(ptr [[T0]])
// Local cleanup.
// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr [[B]]
// CHECK-NEXT: call void @llvm.objc.release(ptr [[T0]])
// CHECK-NEXT: ret void
}
// CHECK-LABEL: define{{.*}} void @test20(
// CHECK: [[XADDR:%.*]] = alloca ptr
// CHECK-NEXT: [[BLOCK:%.*]] = alloca <[[BLOCKTY:.*]]>
// CHECK-NEXT: [[RETAINEDX:%.*]] = call ptr @llvm.objc.retain(ptr %{{.*}})
// CHECK-NEXT: store ptr [[RETAINEDX]], ptr [[XADDR]]
// CHECK: [[BLOCKCAPTURED:%.*]] = getelementptr inbounds <[[BLOCKTY]]>, ptr [[BLOCK]], i32 0, i32 5
// CHECK: [[CAPTURED:%.*]] = load ptr, ptr [[XADDR]]
// CHECK: store ptr [[CAPTURED]], ptr [[BLOCKCAPTURED]]
// CHECK: [[CAPTURE:%.*]] = load ptr, ptr [[BLOCKCAPTURED]]
// CHECK-NEXT: call void (...) @llvm.objc.clang.arc.use(ptr [[CAPTURE]])
// CHECK-NEXT: [[X:%.*]] = load ptr, ptr [[XADDR]]
// CHECK-NEXT: call void @llvm.objc.release(ptr [[X]])
// CHECK-NEXT: ret void
// CHECK-UNOPT-LABEL: define{{.*}} void @test20(
// CHECK-UNOPT: [[XADDR:%.*]] = alloca ptr
// CHECK-UNOPT-NEXT: [[BLOCK:%.*]] = alloca <[[BLOCKTY:.*]]>
// CHECK-UNOPT: [[BLOCKCAPTURED:%.*]] = getelementptr inbounds <[[BLOCKTY]]>, ptr [[BLOCK]], i32 0, i32 5
// CHECK-UNOPT: [[CAPTURED:%.*]] = load ptr, ptr [[XADDR]]
// CHECK-UNOPT: [[RETAINED:%.*]] = call ptr @llvm.objc.retain(ptr [[CAPTURED]])
// CHECK-UNOPT: store ptr [[RETAINED]], ptr [[BLOCKCAPTURED]]
// CHECK-UNOPT: call void @llvm.objc.storeStrong(ptr [[BLOCKCAPTURED]], ptr null)
void test20_callee(void (^)(void));
void test20(const id x) {
test20_callee(^{ (void)x; });
}
// CHECK-LABEL: define{{.*}} void @test21(
// CHECK: %[[V6:.*]] = call ptr @llvm.objc.retainBlock(
// CHECK: call void (i32, ...) @test21_callee(i32 noundef 1, ptr noundef %[[V6]]),
void test21_callee(int n, ...);
void test21(id x) {
test21_callee(1, ^{ (void)x; });
}
// The lifetime of 'x', which is captured by the block in the statement
// expression, should be extended.
// CHECK-COMMON-LABEL: define{{.*}} ptr @test22(
// CHECK-COMMON: %[[BLOCK_CAPTURED:.*]] = getelementptr inbounds <{ ptr, i32, i32, ptr, ptr, ptr }>, ptr %{{.*}}, i32 0, i32 5
// CHECK-COMMON: %[[V3:.*]] = call ptr @llvm.objc.retain(ptr %{{.*}})
// CHECK-COMMON: store ptr %[[V3]], ptr %[[BLOCK_CAPTURED]], align 8
// CHECK-COMMON: call void @test22_1()
// CHECK-UNOPT: call void @llvm.objc.storeStrong(ptr %[[BLOCK_CAPTURED]], ptr null)
// CHECK: %[[V15:.*]] = load ptr, ptr %[[BLOCK_CAPTURED]], align 8
// CHECK: call void @llvm.objc.release(ptr %[[V15]])
id test22(int c, id x) {
extern id test22_0(void);
extern void test22_1(void);
return c ? test22_0() : ({ id (^b)(void) = ^{ return x; }; test22_1(); b(); });
}
@interface Test23
-(void)m:(int)i, ...;
@end
// CHECK-COMMON-LABEL: define{{.*}} void @test23(
// CHECK-COMMON: %[[V9:.*]] = call ptr @llvm.objc.retainBlock(
// CHECK-COMMON: call void (ptr, ptr, i32, ...) @objc_msgSend(ptr noundef %{{.*}}, ptr noundef %{{.*}}, i32 noundef 123, ptr noundef %[[V9]])
void test23(id x, Test23 *t) {
[t m:123, ^{ (void)x; }];
}
// CHECK-COMMON-LABEL: define internal void @"\01+[Test24 m]"(
// CHECK-COMMON: %[[BLOCK_DESCRIPTOR:.*]] = getelementptr inbounds <{ ptr, i32, i32, ptr, ptr, ptr }>, ptr %{{.*}}, i32 0, i32 4
// CHECK: store ptr @[[BLOCK_DESCRIPTOR_TMP10]], ptr %[[BLOCK_DESCRIPTOR]],
@interface Test24
@property (class) void (^block)(void);
+(void)m;
@end
@implementation Test24
+(void)m {
self.block = ^{ (void)self; };
}
@end
// CHECK: attributes [[NUW]] = { nounwind }
// CHECK-UNOPT: attributes [[NUW]] = { nounwind }
Reference in New Issue View Git Blame Copy Permalink