61 lines · c
1// RUN: %clang_cc1 %s -emit-llvm -o - -fblocks -triple x86_64-apple-darwin10 | FileCheck %s2 3// CHECK: [[AGG:%.*]] = type { i32 }4typedef struct { int v; } Agg;5Agg makeAgg(void);6 7// When assigning into a __block variable, ensure that we compute that8// address *after* evaluating the RHS when the RHS has the capacity to9// cause a block copy.10void test0(void) {11 __block Agg a = {100};12 ^{ (void)a; };13 14 a = makeAgg();15}16// CHECK-LABEL: define{{.*}} void @test0()17// CHECK: [[A:%.*]] = alloca [[BYREF:%.*]], align 818// CHECK-NEXT: alloca <{ ptr, i32, i32, ptr, ptr, ptr }>, align 819// CHECK-NEXT: [[TEMP:%.*]] = alloca [[AGG]], align 420// CHECK: [[RESULT:%.*]] = call i32 @makeAgg()21// CHECK-NEXT: [[T0:%.*]] = getelementptr inbounds nuw [[AGG]], ptr [[TEMP]], i32 0, i32 022// CHECK-NEXT: store i32 [[RESULT]], ptr [[T0]]23// Check that we properly assign into the forwarding pointer.24// CHECK-NEXT: [[A_FORWARDING:%.*]] = getelementptr inbounds nuw [[BYREF]], ptr [[A]], i32 0, i32 125// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr [[A_FORWARDING]]26// CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds nuw [[BYREF]], ptr [[T0]], i32 0, i32 427// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 8 [[T1]], ptr align 4 [[TEMP]], i64 4, i1 false)28// Verify that there's nothing else significant in the function.29// CHECK-NEXT: call void @_Block_object_dispose(ptr [[A]], i32 8)30// CHECK-NEXT: ret void31 32// When chaining assignments into __block variables, make sure we33// propagate the actual value into the outer variable.34void test1(void) {35 __block Agg a, b;36 ^{ (void)a; (void)b; };37 a = b = makeAgg();38}39// CHECK-LABEL: define{{.*}} void @test1()40// CHECK: [[A:%.*]] = alloca [[A_BYREF:%.*]], align 841// CHECK-NEXT: [[B:%.*]] = alloca [[B_BYREF:%.*]], align 842// CHECK-NEXT: alloca <{ ptr, i32, i32, ptr, ptr, ptr, ptr }>, align 843// CHECK-NEXT: [[TEMP:%.*]] = alloca [[AGG]], align 444// CHECK: [[RESULT:%.*]] = call i32 @makeAgg()45// CHECK-NEXT: [[T0:%.*]] = getelementptr inbounds nuw [[AGG]], ptr [[TEMP]], i32 0, i32 046// CHECK-NEXT: store i32 [[RESULT]], ptr [[T0]]47// Check that we properly assign into the forwarding pointer, first for b:48// CHECK-NEXT: [[B_FORWARDING:%.*]] = getelementptr inbounds nuw [[B_BYREF]], ptr [[B]], i32 0, i32 149// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr [[B_FORWARDING]]50// CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds nuw [[B_BYREF]], ptr [[T0]], i32 0, i32 451// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 8 [[T1]], ptr align 4 [[TEMP]], i64 4, i1 false)52// Then for 'a':53// CHECK-NEXT: [[A_FORWARDING:%.*]] = getelementptr inbounds nuw [[A_BYREF]], ptr [[A]], i32 0, i32 154// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr [[A_FORWARDING]]55// CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds nuw [[A_BYREF]], ptr [[T0]], i32 0, i32 456// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 8 [[T1]], ptr align 4 [[TEMP]], i64 4, i1 false)57// Verify that there's nothing else significant in the function.58// CHECK-NEXT: call void @_Block_object_dispose(ptr [[B]], i32 8)59// CHECK-NEXT: call void @_Block_object_dispose(ptr [[A]], i32 8)60// CHECK-NEXT: ret void61