1// RUN: %clang_cc1 -emit-llvm %s -o - -triple i686-pc-linux-gnu | FileCheck %s 2// RUN: %clang_cc1 -emit-llvm %s -o - -triple i686-pc-win32 | FileCheck -check-prefix MSVC %s 3 4struct A { int a; virtual int aa(); }; 5struct B { int b; virtual int bb(); }; 6struct C : virtual A, virtual B { int c; virtual int aa(); virtual int bb(); }; 7struct AA { int a; virtual int aa(); }; 8struct BB { int b; virtual int bb(); }; 9struct CC : AA, BB { virtual int aa(); virtual int bb(); virtual int cc(); }; 10struct D : virtual C, virtual CC { int e; }; 11 12D* x; 13 14A* a() { return x; } 15// CHECK: @_Z1av() [[NUW:#[0-9]+]] 16// CHECK: [[VBASEOFFSETPTRA:%[a-zA-Z0-9\.]+]] = getelementptr i8* {{.*}}, i64 -16 17// CHECK: [[CASTVBASEOFFSETPTRA:%[a-zA-Z0-9\.]+]] = bitcast i8* [[VBASEOFFSETPTRA]] to i32* 18// CHECK: load i32* [[CASTVBASEOFFSETPTRA]] 19// CHECK: } 20 21// MSVC: @"\01?a@@YAPAUA@@XZ"() [[NUW:#[0-9]+]] { 22// MSVC: %[[vbptr_off:.*]] = getelementptr inbounds i8* {{.*}}, i32 0 23// MSVC: %[[vbptr:.*]] = bitcast i8* %[[vbptr_off]] to i8** 24// MSVC: %[[vbtable:.*]] = load i8** %[[vbptr]] 25// MSVC: %[[entry:.*]] = getelementptr inbounds i8* {{.*}}, i32 4 26// MSVC: %[[entry_i32:.*]] = bitcast i8* %[[entry]] to i32* 27// MSVC: %[[offset:.*]] = load i32* %[[entry_i32]] 28// MSVC: add nsw i32 0, %[[offset]] 29// MSVC: } 30 31B* b() { return x; } 32// CHECK: @_Z1bv() [[NUW]] 33// CHECK: [[VBASEOFFSETPTRA:%[a-zA-Z0-9\.]+]] = getelementptr i8* {{.*}}, i64 -20 34// CHECK: [[CASTVBASEOFFSETPTRA:%[a-zA-Z0-9\.]+]] = bitcast i8* [[VBASEOFFSETPTRA]] to i32* 35// CHECK: load i32* [[CASTVBASEOFFSETPTRA]] 36// CHECK: } 37 38// Same as 'a' except we use a different vbtable offset. 39// MSVC: @"\01?b@@YAPAUB@@XZ"() [[NUW:#[0-9]+]] { 40// MSVC: %[[vbptr_off:.*]] = getelementptr inbounds i8* {{.*}}, i32 0 41// MSVC: %[[vbptr:.*]] = bitcast i8* %[[vbptr_off]] to i8** 42// MSVC: %[[vbtable:.*]] = load i8** %[[vbptr]] 43// MSVC: %[[entry:.*]] = getelementptr inbounds i8* {{.*}}, i32 8 44// MSVC: %[[entry_i32:.*]] = bitcast i8* %[[entry]] to i32* 45// MSVC: %[[offset:.*]] = load i32* %[[entry_i32]] 46// MSVC: add nsw i32 0, %[[offset]] 47// MSVC: } 48 49 50BB* c() { return x; } 51// CHECK: @_Z1cv() [[NUW]] 52// CHECK: [[VBASEOFFSETPTRC:%[a-zA-Z0-9\.]+]] = getelementptr i8* {{.*}}, i64 -24 53// CHECK: [[CASTVBASEOFFSETPTRC:%[a-zA-Z0-9\.]+]] = bitcast i8* [[VBASEOFFSETPTRC]] to i32* 54// CHECK: [[VBASEOFFSETC:%[a-zA-Z0-9\.]+]] = load i32* [[CASTVBASEOFFSETPTRC]] 55// CHECK: add i32 [[VBASEOFFSETC]], 8 56// CHECK: } 57 58// Same as 'a' except we use a different vbtable offset. 59// MSVC: @"\01?c@@YAPAUBB@@XZ"() [[NUW:#[0-9]+]] { 60// MSVC: %[[vbptr_off:.*]] = getelementptr inbounds i8* {{.*}}, i32 0 61// MSVC: %[[vbptr:.*]] = bitcast i8* %[[vbptr_off]] to i8** 62// MSVC: %[[vbtable:.*]] = load i8** %[[vbptr]] 63// MSVC: %[[entry:.*]] = getelementptr inbounds i8* {{.*}}, i32 16 64// MSVC: %[[entry_i32:.*]] = bitcast i8* %[[entry]] to i32* 65// MSVC: %[[offset:.*]] = load i32* %[[entry_i32]] 66// MSVC: add nsw i32 0, %[[offset]] 67// MSVC: } 68 69// Put the vbptr at a non-zero offset inside a non-virtual base. 70struct E { int e; }; 71struct F : E, D { int f; }; 72 73F* y; 74 75BB* d() { return y; } 76 77// Same as 'c' except the vbptr offset is 4, changing the initial GEP and the 78// final add. 79// MSVC: @"\01?d@@YAPAUBB@@XZ"() [[NUW:#[0-9]+]] { 80// MSVC: %[[vbptr_off:.*]] = getelementptr inbounds i8* {{.*}}, i32 4 81// MSVC: %[[vbptr:.*]] = bitcast i8* %[[vbptr_off]] to i8** 82// MSVC: %[[vbtable:.*]] = load i8** %[[vbptr]] 83// MSVC: %[[entry:.*]] = getelementptr inbounds i8* {{.*}}, i32 16 84// MSVC: %[[entry_i32:.*]] = bitcast i8* %[[entry]] to i32* 85// MSVC: %[[offset:.*]] = load i32* %[[entry_i32]] 86// MSVC: add nsw i32 4, %[[offset]] 87// MSVC: } 88 89// CHECK: attributes [[NUW]] = { nounwind{{.*}} } 90