69cd776e1e
arguments. * Adds 'nonnull' and 'dereferenceable(N)' to 'this' pointer arguments * Gates 'nonnull' on -f(no-)delete-null-pointer-checks * Introduces this-nonnull.cpp and microsoft-abi-this-nullable.cpp tests to explicitly test the behavior of this change * Refactors hundreds of over-constrained clang tests to permit these attributes, where needed * Updates Clang12 patch notes mentioning this change Reviewed-by: rsmith, jdoerfert Differential Revision: https://reviews.llvm.org/D17993
37 lines
1.3 KiB
C++
37 lines
1.3 KiB
C++
// Check that the pointer adjustment from the virtual base offset is loaded as a
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// 32-bit int.
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// RUN: %clang_cc1 %s -triple=aarch64-unknown-fuchsia -S -o - -emit-llvm -fexperimental-relative-c++-abi-vtables | FileCheck %s
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// CHECK-LABEL: @_ZTv0_n12_N7Derived1fEi(
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// CHECK-NEXT: entry:
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// CHECK: [[this:%.+]] = bitcast %class.Derived* %this1 to i8*
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// CHECK-NEXT: [[this2:%.+]] = bitcast i8* [[this]] to i8**
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// CHECK-NEXT: [[vtable:%.+]] = load i8*, i8** [[this2]], align 8
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// CHECK-NEXT: [[vbase_offset_ptr:%.+]] = getelementptr inbounds i8, i8* [[vtable]], i64 -12
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// CHECK-NEXT: [[vbase_offset_ptr2:%.+]] = bitcast i8* [[vbase_offset_ptr]] to i32*
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// CHECK-NEXT: [[vbase_offset:%.+]] = load i32, i32* [[vbase_offset_ptr2]], align 4
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// CHECK-NEXT: [[adj_this:%.+]] = getelementptr inbounds i8, i8* [[this]], i32 [[vbase_offset]]
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// CHECK-NEXT: [[adj_this2:%.+]] = bitcast i8* [[adj_this]] to %class.Derived*
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// CHECK: [[call:%.+]] = tail call i32 @_ZN7Derived1fEi(%class.Derived* {{[^,]*}} [[adj_this2]], i32 {{.*}})
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// CHECK: ret i32 [[call]]
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class Base {
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public:
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virtual int f(int x);
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private:
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long x;
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};
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class Derived : public virtual Base {
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public:
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virtual int f(int x);
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private:
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long y;
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};
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int Base::f(int x) { return x + 1; }
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int Derived::f(int x) { return x + 2; }
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