зеркало из https://github.com/microsoft/clang-1.git
60 строки
2.0 KiB
C++
60 строки
2.0 KiB
C++
// RUN: %clang_cc1 -emit-llvm %s -o - -cxx-abi microsoft -triple=i386-pc-win32 | FileCheck %s
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struct ClassWithoutDtor {
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char x;
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};
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void check_array_no_cookies() {
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// CHECK: define void @"\01?check_array_no_cookies@@YAXXZ"() nounwind
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// CHECK: call noalias i8* @"\01??_U@YAPAXI@Z"(i32 42)
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ClassWithoutDtor *array = new ClassWithoutDtor[42];
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// CHECK: call void @"\01??_V@YAXPAX@Z"(
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delete [] array;
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}
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struct ClassWithDtor {
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char x;
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~ClassWithDtor() {}
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};
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void check_array_cookies_simple() {
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// CHECK: define {{.*}} @"\01?check_array_cookies_simple@@YAXXZ"()
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ClassWithDtor *array = new ClassWithDtor[42];
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// CHECK: [[ALLOCATED:%.*]] = call noalias i8* @"\01??_U@YAPAXI@Z"(i32 46)
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// 46 = 42 + size of cookie (4)
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// CHECK: [[COOKIE:%.*]] = bitcast i8* [[ALLOCATED]] to i32*
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// CHECK: store i32 42, i32* [[COOKIE]]
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// CHECK: [[ARRAY:%.*]] = getelementptr inbounds i8* [[ALLOCATED]], i64 4
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// CHECK: bitcast i8* [[ARRAY]] to [[CLASS:%.*]]*
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delete [] array;
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// CHECK: [[ARRAY_AS_CHAR:%.*]] = bitcast [[CLASS]]* {{%.*}} to i8*
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// CHECK: getelementptr inbounds i8* [[ARRAY_AS_CHAR]], i64 -4
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}
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struct __attribute__((aligned(8))) ClassWithAlignment {
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// FIXME: replace __attribute__((aligned(8))) with __declspec(align(8)) once
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// http://llvm.org/bugs/show_bug.cgi?id=12631 is fixed.
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int *x, *y;
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~ClassWithAlignment() {}
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};
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void check_array_cookies_aligned() {
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// CHECK: define {{.*}} @"\01?check_array_cookies_aligned@@YAXXZ"()
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ClassWithAlignment *array = new ClassWithAlignment[42];
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// CHECK: [[ALLOCATED:%.*]] = call noalias i8* @"\01??_U@YAPAXI@Z"(i32 344)
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// 344 = 42*8 + size of cookie (8, due to alignment)
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// CHECK: [[COOKIE:%.*]] = bitcast i8* [[ALLOCATED]] to i32*
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// CHECK: store i32 42, i32* [[COOKIE]]
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// CHECK: [[ARRAY:%.*]] = getelementptr inbounds i8* [[ALLOCATED]], i64 8
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// CHECK: bitcast i8* [[ARRAY]] to [[CLASS:%.*]]*
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delete [] array;
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// CHECK: [[ARRAY_AS_CHAR:%.*]] = bitcast [[CLASS]]*
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// CHECK: getelementptr inbounds i8* [[ARRAY_AS_CHAR]], i64 -8
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}
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