clang/test/CodeGen/block-byref-aggr.c

   1 // RUN: %clang_cc1 %s -emit-llvm -o - -fblocks -triple x86_64-apple-darwin10 | FileCheck %s
   2
   3 // CHECK: [[AGG:%.*]] = type { i32 }
   4 typedef struct { int v; } Agg;
   5 Agg makeAgg(void);
   6
   7 // When assigning into a __block variable, ensure that we compute that
   8 // address *after* evaluating the RHS when the RHS has the capacity to
   9 // cause a block copy.  rdar://9309454
  10 void 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 8
  18 // CHECK-NEXT: alloca <{ ptr, i32, i32, ptr, ptr, ptr }>, align 8
  19 // CHECK-NEXT: [[TEMP:%.*]] = alloca [[AGG]], align 4
  20 // CHECK:      [[RESULT:%.*]] = call i32 @makeAgg()
  21 // CHECK-NEXT: [[T0:%.*]] = getelementptr inbounds [[AGG]], ptr [[TEMP]], i32 0, i32 0
  22 // CHECK-NEXT: store i32 [[RESULT]], ptr [[T0]]
  23 //   Check that we properly assign into the forwarding pointer.
  24 // CHECK-NEXT: [[A_FORWARDING:%.*]] = getelementptr inbounds [[BYREF]], ptr [[A]], i32 0, i32 1
  25 // CHECK-NEXT: [[T0:%.*]] = load ptr, ptr [[A_FORWARDING]]
  26 // CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds [[BYREF]], ptr [[T0]], i32 0, i32 4
  27 // 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 void
  31
  32 // When chaining assignments into __block variables, make sure we
  33 // propagate the actual value into the outer variable.
  34 // rdar://11757470
  35 void test1(void) {
  36   __block Agg a, b;
  37   ^{ (void)a; (void)b; };
  38   a = b = makeAgg();
  39 }
  40 // CHECK-LABEL:    define{{.*}} void @test1()
  41 // CHECK:      [[A:%.*]] = alloca [[A_BYREF:%.*]], align 8
  42 // CHECK-NEXT: [[B:%.*]] = alloca [[B_BYREF:%.*]], align 8
  43 // CHECK-NEXT: alloca <{ ptr, i32, i32, ptr, ptr, ptr, ptr }>, align 8
  44 // CHECK-NEXT: [[TEMP:%.*]] = alloca [[AGG]], align 4
  45 // CHECK:      [[RESULT:%.*]] = call i32 @makeAgg()
  46 // CHECK-NEXT: [[T0:%.*]] = getelementptr inbounds [[AGG]], ptr [[TEMP]], i32 0, i32 0
  47 // CHECK-NEXT: store i32 [[RESULT]], ptr [[T0]]
  48 //   Check that we properly assign into the forwarding pointer, first for b:
  49 // CHECK-NEXT: [[B_FORWARDING:%.*]] = getelementptr inbounds [[B_BYREF]], ptr [[B]], i32 0, i32 1
  50 // CHECK-NEXT: [[T0:%.*]] = load ptr, ptr [[B_FORWARDING]]
  51 // CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds [[B_BYREF]], ptr [[T0]], i32 0, i32 4
  52 // CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 8 [[T1]], ptr align 4 [[TEMP]], i64 4, i1 false)
  53 //   Then for 'a':
  54 // CHECK-NEXT: [[A_FORWARDING:%.*]] = getelementptr inbounds [[A_BYREF]], ptr [[A]], i32 0, i32 1
  55 // CHECK-NEXT: [[T0:%.*]] = load ptr, ptr [[A_FORWARDING]]
  56 // CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds [[A_BYREF]], ptr [[T0]], i32 0, i32 4
  57 // CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 8 [[T1]], ptr align 4 [[TEMP]], i64 4, i1 false)
  58 //   Verify that there's nothing else significant in the function.
  59 // CHECK-NEXT: call void @_Block_object_dispose(ptr [[B]], i32 8)
  60 // CHECK-NEXT: call void @_Block_object_dispose(ptr [[A]], i32 8)
  61 // CHECK-NEXT: ret void