derek.holloway
7502bf64a4
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144 lines
7.2 KiB
C++
144 lines
7.2 KiB
C++
// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -fclangir -emit-cir %s -o - | FileCheck --check-prefix=CIR %s
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// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -fclangir -emit-llvm %s -o - | FileCheck --check-prefix=LLVM %s
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// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -emit-llvm %s -o - | FileCheck --check-prefix=OGCG %s
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struct A { int a; virtual int aa(); };
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struct B { int b; virtual int bb(); };
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struct C : virtual A, virtual B { int c; virtual int aa(); virtual int bb(); };
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struct AA { int a; virtual int aa(); };
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struct BB { int b; virtual int bb(); };
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struct CC : AA, BB { virtual int aa(); virtual int bb(); virtual int cc(); };
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struct D : virtual C, virtual CC { int e; };
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D* x;
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// CIR-LABEL: @_Z1av()
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// This uses the vtable to get the offset to the base object. The offset from
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// the vptr to the base object offset in the vtable is a compile-time constant.
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// CIR: %[[X_ADDR:.*]] = cir.get_global @x : !cir.ptr<!cir.ptr<!rec_D>>
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// CIR: %[[X:.*]] = cir.load{{.*}} %[[X_ADDR]]
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// CIR: %[[X_VPTR_ADDR:.*]] = cir.vtable.get_vptr %[[X]] : !cir.ptr<!rec_D> -> !cir.ptr<!cir.vptr>
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// CIR: %[[X_VPTR_BASE:.*]] = cir.load{{.*}} %[[X_VPTR_ADDR]] : !cir.ptr<!cir.vptr>, !cir.vptr
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// CIR: %[[X_BASE_I8PTR:.*]] = cir.cast bitcast %[[X_VPTR_BASE]] : !cir.vptr -> !cir.ptr<!u8i>
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// CIR: %[[OFFSET_OFFSET:.*]] = cir.const #cir.int<-32> : !s64i
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// CIR: %[[OFFSET_PTR:.*]] = cir.ptr_stride %[[X_BASE_I8PTR]], %[[OFFSET_OFFSET]] : (!cir.ptr<!u8i>, !s64i) -> !cir.ptr<!u8i>
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// CIR: %[[OFFSET_PTR_CAST:.*]] = cir.cast bitcast %[[OFFSET_PTR]] : !cir.ptr<!u8i> -> !cir.ptr<!s64i>
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// CIR: %[[OFFSET:.*]] = cir.load{{.*}} %[[OFFSET_PTR_CAST]] : !cir.ptr<!s64i>, !s64i
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// CIR: %[[VBASE_ADDR:.*]] = cir.ptr_stride {{.*}}, %[[OFFSET]] : (!cir.ptr<!u8i>, !s64i) -> !cir.ptr<!u8i>
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// CIR: cir.cast bitcast %[[VBASE_ADDR]] : !cir.ptr<!u8i> -> !cir.ptr<!rec_D>
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// LLVM-LABEL: @_Z1av(
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// LLVM: [[OBJ:%.*]] = load ptr, ptr @x
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// LLVM-NEXT: [[VTABLE:%.*]] = load ptr, ptr [[OBJ]]
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// LLVM-NEXT: [[VBASE_OFFSET_PTR:%.*]] = getelementptr i8, ptr [[VTABLE]], i64 -32
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// LLVM-NEXT: [[VBASE_OFFSET:%.*]] = load i64, ptr [[VBASE_OFFSET_PTR]]
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// LLVM-NEXT: [[ADD_PTR:%.*]] = getelementptr i8, ptr [[OBJ]], i64 [[VBASE_OFFSET]]
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// LLVM: ret ptr
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// OGCG-LABEL: @_Z1av(
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// OGCG: [[ENTRY:.*]]:
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// OGCG-NEXT: [[TMP0:%.*]] = load ptr, ptr @x, align 8
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// OGCG-NEXT: [[TMP1:%.*]] = icmp eq ptr [[TMP0]], null
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// OGCG-NEXT: br i1 [[TMP1]], label %[[CAST_END:.*]], label %[[CAST_NOTNULL:.*]]
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// OGCG: [[CAST_NOTNULL]]:
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// OGCG-NEXT: [[VTABLE:%.*]] = load ptr, ptr [[TMP0]], align 8
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// OGCG-NEXT: [[VBASE_OFFSET_PTR:%.*]] = getelementptr i8, ptr [[VTABLE]], i64 -32
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// OGCG-NEXT: [[VBASE_OFFSET:%.*]] = load i64, ptr [[VBASE_OFFSET_PTR]], align 8
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// OGCG-NEXT: [[ADD_PTR:%.*]] = getelementptr inbounds i8, ptr [[TMP0]], i64 [[VBASE_OFFSET]]
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// OGCG-NEXT: br label %[[CAST_END]]
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// OGCG: [[CAST_END]]:
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// OGCG-NEXT: [[CAST_RESULT:%.*]] = phi ptr [ [[ADD_PTR]], %[[CAST_NOTNULL]] ], [ null, %[[ENTRY]] ]
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// OGCG-NEXT: ret ptr [[CAST_RESULT]]
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A* a() { return x; }
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// LLVM-LABEL: @_Z1bv(
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// LLVM: [[OBJ:%.*]] = load ptr, ptr @x
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// LLVM-NEXT: [[VTABLE:%.*]] = load ptr, ptr [[OBJ]]
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// LLVM-NEXT: [[VBASE_OFFSET_PTR:%.*]] = getelementptr i8, ptr [[VTABLE]], i64 -40
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// LLVM-NEXT: [[VBASE_OFFSET:%.*]] = load i64, ptr [[VBASE_OFFSET_PTR]]
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// LLVM-NEXT: [[ADD_PTR:%.*]] = getelementptr i8, ptr [[OBJ]], i64 [[VBASE_OFFSET]]
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// LLVM: ret ptr
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// OGCG-LABEL: @_Z1bv(
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// OGCG: [[ENTRY:.*]]:
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// OGCG-NEXT: [[TMP0:%.*]] = load ptr, ptr @x, align 8
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// OGCG-NEXT: [[TMP1:%.*]] = icmp eq ptr [[TMP0]], null
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// OGCG-NEXT: br i1 [[TMP1]], label %[[CAST_END:.*]], label %[[CAST_NOTNULL:.*]]
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// OGCG: [[CAST_NOTNULL]]:
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// OGCG-NEXT: [[VTABLE:%.*]] = load ptr, ptr [[TMP0]], align 8
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// OGCG-NEXT: [[VBASE_OFFSET_PTR:%.*]] = getelementptr i8, ptr [[VTABLE]], i64 -40
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// OGCG-NEXT: [[VBASE_OFFSET:%.*]] = load i64, ptr [[VBASE_OFFSET_PTR]], align 8
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// OGCG-NEXT: [[ADD_PTR:%.*]] = getelementptr inbounds i8, ptr [[TMP0]], i64 [[VBASE_OFFSET]]
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// OGCG-NEXT: br label %[[CAST_END]]
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// OGCG: [[CAST_END]]:
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// OGCG-NEXT: [[CAST_RESULT:%.*]] = phi ptr [ [[ADD_PTR]], %[[CAST_NOTNULL]] ], [ null, %[[ENTRY]] ]
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// OGCG-NEXT: ret ptr [[CAST_RESULT]]
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//
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B* b() { return x; }
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// LLVM-LABEL: @_Z1cv(
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// LLVM: [[OBJ:%.*]] = load ptr, ptr @x
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// LLVM-NEXT: [[VTABLE:%.*]] = load ptr, ptr [[OBJ]]
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// LLVM-NEXT: [[VBASE_OFFSET_PTR:%.*]] = getelementptr i8, ptr [[VTABLE]], i64 -48
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// LLVM-NEXT: [[VBASE_OFFSET:%.*]] = load i64, ptr [[VBASE_OFFSET_PTR]]
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// LLVM-NEXT: [[OFFSET:%.*]] = add i64 [[VBASE_OFFSET]], 16
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// LLVM-NEXT: [[ADD_PTR:%.*]] = getelementptr i8, ptr [[OBJ]], i64 [[OFFSET]]
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// LLVM: ret ptr
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// OGCG-LABEL: @_Z1cv(
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// OGCG: [[ENTRY:.*]]:
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// OGCG-NEXT: [[TMP0:%.*]] = load ptr, ptr @x, align 8
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// OGCG-NEXT: [[TMP1:%.*]] = icmp eq ptr [[TMP0]], null
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// OGCG-NEXT: br i1 [[TMP1]], label %[[CAST_END:.*]], label %[[CAST_NOTNULL:.*]]
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// OGCG: [[CAST_NOTNULL]]:
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// OGCG-NEXT: [[VTABLE:%.*]] = load ptr, ptr [[TMP0]], align 8
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// OGCG-NEXT: [[VBASE_OFFSET_PTR:%.*]] = getelementptr i8, ptr [[VTABLE]], i64 -48
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// OGCG-NEXT: [[VBASE_OFFSET:%.*]] = load i64, ptr [[VBASE_OFFSET_PTR]], align 8
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// OGCG-NEXT: [[TMP2:%.*]] = add i64 [[VBASE_OFFSET]], 16
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// OGCG-NEXT: [[ADD_PTR:%.*]] = getelementptr inbounds i8, ptr [[TMP0]], i64 [[TMP2]]
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// OGCG-NEXT: br label %[[CAST_END]]
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// OGCG: [[CAST_END]]:
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// OGCG-NEXT: [[CAST_RESULT:%.*]] = phi ptr [ [[ADD_PTR]], %[[CAST_NOTNULL]] ], [ null, %[[ENTRY]] ]
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// OGCG-NEXT: ret ptr [[CAST_RESULT]]
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//
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BB* c() { return x; }
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struct E { int e; };
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struct F : E, D { int f; };
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F* y;
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// CIR-LABEL: @_Z1dv
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// CIR: %[[OFFSET:.*]] = cir.load{{.*}} {{.*}} : !cir.ptr<!s64i>, !s64i
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// CIR: %[[ADJUST:.*]] = cir.const #cir.int<16> : !s64i
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// CIR: cir.add %[[OFFSET]], %[[ADJUST]] : !s64i
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// LLVM-LABEL: @_Z1dv(
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// LLVM: [[OBJ:%.*]] = load ptr, ptr @y
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// LLVM-NEXT: [[VTABLE:%.*]] = load ptr, ptr [[OBJ]]
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// LLVM-NEXT: [[VBASE_OFFSET_PTR:%.*]] = getelementptr i8, ptr [[VTABLE]], i64 -48
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// LLVM-NEXT: [[VBASE_OFFSET:%.*]] = load i64, ptr [[VBASE_OFFSET_PTR]]
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// LLVM-NEXT: [[OFFSET:%.*]] = add i64 [[VBASE_OFFSET]], 16
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// LLVM-NEXT: [[ADD_PTR:%.*]] = getelementptr i8, ptr [[OBJ]], i64 [[OFFSET]]
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// LLVM: ret ptr
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// OGCG-LABEL: @_Z1dv(
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// OGCG: [[ENTRY:.*]]:
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// OGCG-NEXT: [[TMP0:%.*]] = load ptr, ptr @y, align 8
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// OGCG-NEXT: [[TMP1:%.*]] = icmp eq ptr [[TMP0]], null
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// OGCG-NEXT: br i1 [[TMP1]], label %[[CAST_END:.*]], label %[[CAST_NOTNULL:.*]]
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// OGCG: [[CAST_NOTNULL]]:
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// OGCG-NEXT: [[VTABLE:%.*]] = load ptr, ptr [[TMP0]], align 8
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// OGCG-NEXT: [[VBASE_OFFSET_PTR:%.*]] = getelementptr i8, ptr [[VTABLE]], i64 -48
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// OGCG-NEXT: [[VBASE_OFFSET:%.*]] = load i64, ptr [[VBASE_OFFSET_PTR]], align 8
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// OGCG-NEXT: [[TMP2:%.*]] = add i64 [[VBASE_OFFSET]], 16
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// OGCG-NEXT: [[ADD_PTR:%.*]] = getelementptr inbounds i8, ptr [[TMP0]], i64 [[TMP2]]
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// OGCG-NEXT: br label %[[CAST_END]]
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// OGCG: [[CAST_END]]:
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// OGCG-NEXT: [[CAST_RESULT:%.*]] = phi ptr [ [[ADD_PTR]], %[[CAST_NOTNULL]] ], [ null, %[[ENTRY]] ]
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// OGCG-NEXT: ret ptr [[CAST_RESULT]]
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//
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BB* d() { return y; }
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