| 1 | // RUN: %clang_cc1 -emit-llvm %s -o - -triple i686-pc-linux-gnu | FileCheck %s |
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| 2 | // RUN: %clang_cc1 -emit-llvm %s -o - -triple i686-pc-win32 | FileCheck -check-prefix MSVC %s |
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| 3 | |
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| 4 | struct A { int a; virtual int aa(); }; |
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| 5 | struct B { int b; virtual int bb(); }; |
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| 6 | struct C : virtual A, virtual B { int c; virtual int aa(); virtual int bb(); }; |
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| 7 | struct AA { int a; virtual int aa(); }; |
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| 8 | struct BB { int b; virtual int bb(); }; |
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| 9 | struct CC : AA, BB { virtual int aa(); virtual int bb(); virtual int cc(); }; |
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| 10 | struct D : virtual C, virtual CC { int e; }; |
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| 11 | |
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| 12 | D* x; |
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| 13 | |
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| 14 | A* a() { return x; } |
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| 15 | // CHECK: @_Z1av() [[NUW:#[0-9]+]] |
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| 16 | // CHECK: [[VBASEOFFSETPTRA:%[a-zA-Z0-9\.]+]] = getelementptr i8, i8* {{.*}}, i64 -16 |
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| 17 | // CHECK: [[CASTVBASEOFFSETPTRA:%[a-zA-Z0-9\.]+]] = bitcast i8* [[VBASEOFFSETPTRA]] to i32* |
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| 18 | // CHECK: load i32, i32* [[CASTVBASEOFFSETPTRA]] |
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| 19 | // CHECK: } |
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| 20 | |
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| 21 | // MSVC: @"?a@@YAPAUA@@XZ"() [[NUW:#[0-9]+]] { |
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| 22 | // MSVC: %[[vbptr_off:.*]] = getelementptr inbounds i8, i8* {{.*}}, i32 0 |
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| 23 | // MSVC: %[[vbptr:.*]] = bitcast i8* %[[vbptr_off]] to i32** |
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| 24 | // MSVC: %[[vbtable:.*]] = load i32*, i32** %[[vbptr]] |
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| 25 | // MSVC: %[[entry:.*]] = getelementptr inbounds i32, i32* {{.*}}, i32 1 |
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| 26 | // MSVC: %[[offset:.*]] = load i32, i32* %[[entry]] |
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| 27 | // MSVC: add nsw i32 0, %[[offset]] |
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| 28 | // MSVC: } |
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| 29 | |
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| 30 | B* b() { return x; } |
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| 31 | // CHECK: @_Z1bv() [[NUW]] |
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| 32 | // CHECK: [[VBASEOFFSETPTRA:%[a-zA-Z0-9\.]+]] = getelementptr i8, i8* {{.*}}, i64 -20 |
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| 33 | // CHECK: [[CASTVBASEOFFSETPTRA:%[a-zA-Z0-9\.]+]] = bitcast i8* [[VBASEOFFSETPTRA]] to i32* |
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| 34 | // CHECK: load i32, i32* [[CASTVBASEOFFSETPTRA]] |
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| 35 | // CHECK: } |
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| 36 | |
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| 37 | // Same as 'a' except we use a different vbtable offset. |
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| 38 | // MSVC: @"?b@@YAPAUB@@XZ"() [[NUW:#[0-9]+]] { |
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| 39 | // MSVC: %[[vbptr_off:.*]] = getelementptr inbounds i8, i8* {{.*}}, i32 0 |
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| 40 | // MSVC: %[[vbptr:.*]] = bitcast i8* %[[vbptr_off]] to i32** |
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| 41 | // MSVC: %[[vbtable:.*]] = load i32*, i32** %[[vbptr]] |
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| 42 | // MSVC: %[[entry:.*]] = getelementptr inbounds i32, i32* {{.*}}, i32 2 |
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| 43 | // MSVC: %[[offset:.*]] = load i32, i32* %[[entry]] |
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| 44 | // MSVC: add nsw i32 0, %[[offset]] |
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| 45 | // MSVC: } |
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| 46 | |
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| 47 | |
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| 48 | BB* c() { return x; } |
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| 49 | // CHECK: @_Z1cv() [[NUW]] |
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| 50 | // CHECK: [[VBASEOFFSETPTRC:%[a-zA-Z0-9\.]+]] = getelementptr i8, i8* {{.*}}, i64 -24 |
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| 51 | // CHECK: [[CASTVBASEOFFSETPTRC:%[a-zA-Z0-9\.]+]] = bitcast i8* [[VBASEOFFSETPTRC]] to i32* |
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| 52 | // CHECK: [[VBASEOFFSETC:%[a-zA-Z0-9\.]+]] = load i32, i32* [[CASTVBASEOFFSETPTRC]] |
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| 53 | // CHECK: add i32 [[VBASEOFFSETC]], 8 |
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| 54 | // CHECK: } |
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| 55 | |
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| 56 | // Same as 'a' except we use a different vbtable offset. |
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| 57 | // MSVC: @"?c@@YAPAUBB@@XZ"() [[NUW:#[0-9]+]] { |
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| 58 | // MSVC: %[[vbptr_off:.*]] = getelementptr inbounds i8, i8* {{.*}}, i32 0 |
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| 59 | // MSVC: %[[vbptr:.*]] = bitcast i8* %[[vbptr_off]] to i32** |
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| 60 | // MSVC: %[[vbtable:.*]] = load i32*, i32** %[[vbptr]] |
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| 61 | // MSVC: %[[entry:.*]] = getelementptr inbounds i32, i32* {{.*}}, i32 4 |
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| 62 | // MSVC: %[[offset:.*]] = load i32, i32* %[[entry]] |
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| 63 | // MSVC: add nsw i32 0, %[[offset]] |
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| 64 | // MSVC: } |
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| 65 | |
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| 66 | // Put the vbptr at a non-zero offset inside a non-virtual base. |
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| 67 | struct E { int e; }; |
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| 68 | struct F : E, D { int f; }; |
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| 69 | |
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| 70 | F* y; |
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| 71 | |
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| 72 | BB* d() { return y; } |
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| 73 | |
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| 74 | // Same as 'c' except the vbptr offset is 4, changing the initial GEP and the |
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| 75 | // final add. |
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| 76 | // MSVC: @"?d@@YAPAUBB@@XZ"() [[NUW:#[0-9]+]] { |
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| 77 | // MSVC: %[[vbptr_off:.*]] = getelementptr inbounds i8, i8* {{.*}}, i32 4 |
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| 78 | // MSVC: %[[vbptr:.*]] = bitcast i8* %[[vbptr_off]] to i32** |
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| 79 | // MSVC: %[[vbtable:.*]] = load i32*, i32** %[[vbptr]] |
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| 80 | // MSVC: %[[entry:.*]] = getelementptr inbounds i32, i32* {{.*}}, i32 4 |
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| 81 | // MSVC: %[[offset:.*]] = load i32, i32* %[[entry]] |
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| 82 | // MSVC: add nsw i32 4, %[[offset]] |
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| 83 | // MSVC: } |
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| 84 | |
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| 85 | // CHECK: attributes [[NUW]] = { noinline nounwind{{.*}} } |
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| 86 | |
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