clang/test/CodeGenObjC/arc-loadweakretained-release.m

   1 // RUN: %clang_cc1 -no-opaque-pointers -triple x86_64-apple-darwin10 -emit-llvm -fblocks -fobjc-arc -fobjc-runtime-has-weak -o - %s | FileCheck %s
   2 // rdar://10849570
   3
   4 @interface NSObject @end
   5
   6 @interface SomeClass : NSObject
   7 - (id) init;
   8 @end
   9
  10 @implementation SomeClass
  11 - (void)foo {
  12 }
  13 - (id) init {
  14     return 0;
  15 }
  16 + alloc { return 0; }
  17 @end
  18
  19 int main (int argc, const char * argv[]) {
  20     @autoreleasepool {
  21         SomeClass *objPtr1 = [[SomeClass alloc] init];
  22         __weak SomeClass *weakRef = objPtr1;
  23
  24         [weakRef foo];
  25
  26         objPtr1 = (void *)0;
  27         return 0;
  28     }
  29 }
  30
  31 // CHECK: [[SIXTEEN:%.*]]  = call i8* @llvm.objc.loadWeakRetained(i8** {{%.*}})
  32 // CHECK-NEXT:  [[SEVENTEEN:%.*]] = bitcast i8* [[SIXTEEN]] to {{%.*}}
  33 // CHECK-NEXT:  [[NINETEEN:%.*]] = bitcast %0* [[SEVENTEEN]] to i8*
  34 // CHECK-NEXT:  [[EIGHTEEN:%.*]] = load i8*, i8** @OBJC_SELECTOR_REFERENCES_.6
  35 // CHECK-NEXT:  call void bitcast (i8* (i8*, i8*, ...)* @objc_msgSend
  36 // CHECK-NEXT:  [[TWENTY:%.*]] = bitcast %0* [[SEVENTEEN]] to i8*
  37 // CHECK-NEXT:  call void @llvm.objc.release(i8* [[TWENTY]])
  38
  39 void test1(int cond) {
  40   extern void test34_sink(id *);
  41   __weak id weak;
  42   test34_sink(cond ? &weak : 0);
  43 }
  44
  45 // CHECK-LABEL: define{{.*}} void @test1(
  46 // CHECK: [[CONDADDR:%.*]] = alloca i32
  47 // CHECK-NEXT: [[WEAK:%.*]] = alloca i8*
  48 // CHECK-NEXT: [[INCRTEMP:%.*]] = alloca i8*
  49 // CHECK-NEXT: [[CONDCLEANUPSAVE:%.*]] = alloca i8*
  50 // CHECK-NEXT: [[CONDCLEANUP:%.*]] = alloca i1
  51 // CHECK-NEXT: store i32
  52 // CHECK-NEXT: store i8* null, i8** [[WEAK]]
  53 // CHECK:  [[COND1:%.*]] = phi i8**
  54 // CHECK-NEXT: [[ICRISNULL:%.*]] = icmp eq i8** [[COND1]], null
  55 // CHECK-NEXT: [[ICRARGUMENT:%.*]] = select i1 [[ICRISNULL]], i8** null, i8** [[INCRTEMP]]
  56 // CHECK-NEXT: store i1 false, i1* [[CONDCLEANUP]]
  57 // CHECK-NEXT: br i1 [[ICRISNULL]], label [[ICRCONT:%.*]], label [[ICRCOPY:%.*]]
  58 // CHECK:  [[ONE:%.*]] = call i8* @llvm.objc.loadWeakRetained(
  59 // CHECK-NEXT: store i8* [[ONE]], i8** [[CONDCLEANUPSAVE]]
  60 // CHECK-NEXT: store i1 true, i1* [[CONDCLEANUP]]
  61 // CHECK-NEXT: store i8* [[ONE]], i8** [[INCRTEMP]]
  62 // CHECK-NEXT: br label
  63
  64 // CHECK: call void @test34_sink(
  65 // CHECK-NEXT: [[ICRISNULL1:%.*]] = icmp eq i8** [[COND1]], null
  66 // CHECK-NEXT: br i1 [[ICRISNULL1]], label [[ICRDONE:%.*]], label [[ICRWRITEBACK:%.*]]
  67 // CHECK:  [[TWO:%.*]] = load i8*, i8** [[INCRTEMP]]
  68 // CHECK-NEXT:  [[THREE:%.*]] = call i8* @llvm.objc.storeWeak(
  69 // CHECK-NEXT:  br label [[ICRDONE]]
  70 // CHECK:  [[CLEANUPISACTIVE:%.*]] = load i1, i1* [[CONDCLEANUP]]
  71 // CHECK-NEXT:  br i1 [[CLEANUPISACTIVE]], label [[CLEASNUPACTION:%.*]], label [[CLEANUPDONE:%.*]]
  72
  73 // CHECK: [[FOUR:%.*]] = load i8*, i8** [[CONDCLEANUPSAVE]]
  74 // CHECK-NEXT: call void @llvm.objc.release(i8* [[FOUR]])
  75 // CHECK-NEXT:  br label
  76 // CHECK:  call void @llvm.objc.destroyWeak(i8** [[WEAK]])
  77 // CHECK-NEXT: ret void