clang/test/CodeGen/assignment-tracking/assignment-tracking.cpp

   1 // RUN: %clang_cc1 -triple x86_64-none-linux-gnu -debug-info-kind=standalone -O0 \
   2 // RUN:     -emit-llvm  -fexperimental-assignment-tracking=forced %s -o -        \
   3 // RUN:     -disable-O0-optnone                                                  \
   4 // RUN: | FileCheck %s --implicit-check-not="call void @llvm.dbg"
   5
   6 // Based on llvm/test/DebugInfo/Generic/track-assignments.ll - check that using
   7 // -Xclang -fexperimental-assignment-tracking results in emitting (or, as it is
   8 // set up currently, telling llvm to create) assignment tracking metadata.
   9 //
  10 // See the original test for more info.
  11
  12 struct Inner { int A, B; };
  13 struct Outer { Inner A, B; };
  14 struct Large { int A[10]; };
  15 struct LCopyCtor { int A[4]; LCopyCtor(); LCopyCtor(LCopyCtor const &); };
  16 int Value, Index, Cond;
  17 Inner InnerA, InnerB;
  18 Large L;
  19
  20 void zeroInit() { int Z[3] = {0, 0, 0}; }
  21 // CHECK-LABEL: define dso_local void @_Z8zeroInitv
  22 // CHECK:       %Z = alloca [3 x i32], align 4, !DIAssignID ![[ID_0:[0-9]+]]
  23 // CHECK-NEXT:  call void @llvm.dbg.assign(metadata i1 undef, metadata ![[VAR_0:[0-9]+]], metadata !DIExpression(), metadata ![[ID_0]], metadata ptr %Z, metadata !DIExpression())
  24 // CHECK:        @llvm.memset{{.*}}, !DIAssignID ![[ID_1:[0-9]+]]
  25 // CHECK-NEXT:   call void @llvm.dbg.assign(metadata i8 0, metadata ![[VAR_0]], metadata !DIExpression(), metadata ![[ID_1]], metadata ptr %Z, metadata !DIExpression())
  26
  27 void memcpyInit() { int A[4] = {0, 1, 2, 3}; }
  28 // CHECK-LABEL: define dso_local void @_Z10memcpyInitv
  29 // CHECK:       %A = alloca [4 x i32], align 16, !DIAssignID ![[ID_2:[0-9]+]]
  30 // CHECK-NEXT:  call void @llvm.dbg.assign(metadata i1 undef, metadata ![[VAR_1:[0-9]+]], metadata !DIExpression(), metadata ![[ID_2]], metadata ptr %A, metadata !DIExpression())
  31 // CHECK:        @llvm.memcpy{{.*}}, !DIAssignID ![[ID_3:[0-9]+]]
  32 // CHECK-NEXT:   call void @llvm.dbg.assign(metadata i1 undef, metadata ![[VAR_1]], metadata !DIExpression(), metadata ![[ID_3]], metadata ptr %A, metadata !DIExpression())
  33
  34 void setField() {
  35   Outer O;
  36   O.A.B = Value;
  37 }
  38 // CHECK-LABEL: define dso_local void @_Z8setFieldv
  39 // CHECK:       %O = alloca %struct.Outer, align 4, !DIAssignID ![[ID_4:[0-9]+]]
  40 // CHECK-NEXT:  call void @llvm.dbg.assign(metadata i1 undef, metadata ![[VAR_2:[0-9]+]], metadata !DIExpression(), metadata ![[ID_4]], metadata ptr %O, metadata !DIExpression())
  41 // CHECK:       store i32 %0, ptr %B, align 4,{{.*}}!DIAssignID ![[ID_5:[0-9]+]]
  42 // CHECK-NEXT:  call void @llvm.dbg.assign(metadata i32 %0, metadata ![[VAR_2]], metadata !DIExpression(DW_OP_LLVM_fragment, 32, 32), metadata ![[ID_5]], metadata ptr %B, metadata !DIExpression())
  43
  44 void unknownOffset() {
  45   int A[2];
  46   A[Index] = Value;
  47 }
  48 // CHECK-LABEL: define dso_local void @_Z13unknownOffsetv
  49 // CHECK:       %A = alloca [2 x i32], align 4, !DIAssignID ![[ID_6:[0-9]+]]
  50 // CHECK-NEXT:  call void @llvm.dbg.assign(metadata i1 undef, metadata ![[VAR_3:[0-9]+]], metadata !DIExpression(), metadata ![[ID_6]], metadata ptr %A, metadata !DIExpression())
  51
  52 Inner sharedAlloca() {
  53   if (Cond) {
  54     Inner A = InnerA;
  55     return A;
  56   } else {
  57     Inner B = InnerB;
  58     return B;
  59   }
  60 }
  61 // CHECK-LABEL: define dso_local i64 @_Z12sharedAllocav
  62 // CHECK:       %retval = alloca %struct.Inner, align 4, !DIAssignID ![[ID_7:[0-9]+]]
  63 // CHECK-NEXT:  call void @llvm.dbg.assign(metadata i1 undef, metadata ![[VAR_4:[0-9]+]], metadata !DIExpression(), metadata ![[ID_7]], metadata ptr %retval, metadata !DIExpression())
  64 // CHECK-NEXT:  call void @llvm.dbg.assign(metadata i1 undef, metadata ![[VAR_5:[0-9]+]], metadata !DIExpression(), metadata ![[ID_7]], metadata ptr %retval, metadata !DIExpression())
  65 // CHECK:     if.then:
  66 // CHECK:       call void @llvm.memcpy{{.*}}, !DIAssignID ![[ID_8:[0-9]+]]
  67 // CHECK-NEXT:  call void @llvm.dbg.assign(metadata i1 undef, metadata ![[VAR_4]], metadata !DIExpression(), metadata ![[ID_8]], metadata ptr %retval, metadata !DIExpression())
  68 // CHECK-NEXT:  call void @llvm.dbg.assign(metadata i1 undef, metadata ![[VAR_5]], metadata !DIExpression(), metadata ![[ID_8]], metadata ptr %retval, metadata !DIExpression())
  69 // CHECK:     if.else:
  70 // CHECK:       call void @llvm.memcpy{{.*}}, !DIAssignID ![[ID_9:[0-9]+]]
  71 // CHECK-NEXT:  call void @llvm.dbg.assign(metadata i1 undef, metadata ![[VAR_4]], metadata !DIExpression(), metadata ![[ID_9]], metadata ptr %retval, metadata !DIExpression())
  72 // CHECK-NEXT:  call void @llvm.dbg.assign(metadata i1 undef, metadata ![[VAR_5]], metadata !DIExpression(), metadata ![[ID_9]], metadata ptr %retval, metadata !DIExpression())
  73
  74 Large sret() {
  75   Large X = L;
  76   return X;
  77 }
  78 // CHECK-LABEL: define dso_local void @_Z4sretv
  79 // CHECK:       llvm.dbg.declare
  80
  81 void byval(Large X) {}
  82 // CHECK-LABEL: define dso_local void @_Z5byval5Large
  83 // CHECK:       llvm.dbg.declare
  84
  85 LCopyCtor indirectReturn() {
  86   LCopyCtor R;
  87   return R;
  88 }
  89 // CHECK-LABEL: define dso_local void @_Z14indirectReturnv
  90 // CHECK:       call void @llvm.dbg.declare
  91
  92 // CHECK-DAG: ![[VAR_0]] = !DILocalVariable(name: "Z",
  93 // CHECK-DAG: ![[VAR_1]] = !DILocalVariable(name: "A",
  94 // CHECK-DAG: ![[VAR_2]] = !DILocalVariable(name: "O",
  95 // CHECK-DAG: ![[VAR_3]] = !DILocalVariable(name: "A",
  96 // CHECK-DAG: ![[VAR_4]] = !DILocalVariable(name: "B",
  97 // CHECK-DAG: ![[VAR_5]] = !DILocalVariable(name: "A",