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6b3351792c
For a definition (of most linkage types), dso_local is set for ELF -fno-pic/-fpie
and COFF, but not for Mach-O. This nuance causes unneeded binary format differences.
This patch replaces (function) `define ` with `define{{.*}} `,
(variable/constant/alias) `= ` with `={{.*}} `, or inserts appropriate `{{.*}} `
if there is an explicit linkage.
* Clang will set dso_local for Mach-O, which is currently implied by TargetMachine.cpp. This will make COFF/Mach-O and executable ELF similar.
* Eventually I hope we can make dso_local the textual LLVM IR default (write explicit "dso_preemptable" when applicable) and -fpic ELF will be similar to everything else. This patch helps move toward that goal.
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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