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600e9deacf
This is meant to be used with clang's __builtin_dynamic_object_size. When 'true' is passed to this parameter, the intrinsic has the potential to be folded into instructions that will be evaluated at run time. When 'false', the objectsize intrinsic behaviour is unchanged. rdar://32212419 Differential revision: https://reviews.llvm.org/D56761 llvm-svn: 352664
65 lines
2.2 KiB
C++
65 lines
2.2 KiB
C++
// RUN: %clang_cc1 -triple x86_64-apple-darwin -emit-llvm -o - %s | FileCheck %s
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// C++-specific tests for __builtin_object_size
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int gi;
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// CHECK-LABEL: define void @_Z5test1v()
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void test1() {
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// Guaranteeing that our cast removal logic doesn't break more interesting
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// cases.
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struct A { int a; };
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struct B { int b; };
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struct C: public A, public B {};
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C c;
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// CHECK: store i32 8
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gi = __builtin_object_size(&c, 0);
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// CHECK: store i32 8
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gi = __builtin_object_size((A*)&c, 0);
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// CHECK: store i32 4
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gi = __builtin_object_size((B*)&c, 0);
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// CHECK: store i32 8
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gi = __builtin_object_size((char*)&c, 0);
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// CHECK: store i32 8
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gi = __builtin_object_size((char*)(A*)&c, 0);
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// CHECK: store i32 4
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gi = __builtin_object_size((char*)(B*)&c, 0);
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}
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// CHECK-LABEL: define void @_Z5test2v()
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void test2() {
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struct A { char buf[16]; };
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struct B : A {};
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struct C { int i; B bs[1]; } *c;
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// CHECK: call i64 @llvm.objectsize.i64.p0i8(i8* %{{.*}}, i1 false, i1 true, i1 false)
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gi = __builtin_object_size(&c->bs[0], 0);
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// CHECK: call i64 @llvm.objectsize.i64.p0i8(i8* %{{.*}}, i1 false, i1 true, i1 false)
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gi = __builtin_object_size(&c->bs[0], 1);
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// CHECK: call i64 @llvm.objectsize.i64.p0i8(i8* %{{.*}}, i1 true, i1 true, i1 false)
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gi = __builtin_object_size(&c->bs[0], 2);
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// CHECK: store i32 16
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gi = __builtin_object_size(&c->bs[0], 3);
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// CHECK: call i64 @llvm.objectsize.i64.p0i8(i8* %{{.*}}, i1 false, i1 true, i1 false)
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gi = __builtin_object_size((A*)&c->bs[0], 0);
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// CHECK: store i32 16
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gi = __builtin_object_size((A*)&c->bs[0], 1);
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// CHECK: call i64 @llvm.objectsize.i64.p0i8(i8* %{{.*}}, i1 true, i1 true, i1 false)
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gi = __builtin_object_size((A*)&c->bs[0], 2);
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// CHECK: store i32 16
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gi = __builtin_object_size((A*)&c->bs[0], 3);
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// CHECK: call i64 @llvm.objectsize.i64.p0i8(i8* %{{.*}}, i1 false, i1 true, i1 false)
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gi = __builtin_object_size(&c->bs[0].buf[0], 0);
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// CHECK: store i32 16
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gi = __builtin_object_size(&c->bs[0].buf[0], 1);
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// CHECK: call i64 @llvm.objectsize.i64.p0i8(i8* %{{.*}}, i1 true, i1 true, i1 false)
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gi = __builtin_object_size(&c->bs[0].buf[0], 2);
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// CHECK: store i32 16
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gi = __builtin_object_size(&c->bs[0].buf[0], 3);
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}
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