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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.
83 lines
2.7 KiB
C++
83 lines
2.7 KiB
C++
// RUN: %clang_cc1 -triple x86_64-apple-darwin -emit-llvm -O0 %s -o - 2>&1 -std=c++11 | FileCheck %s
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int gi;
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namespace lambdas {
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// CHECK-LABEL: define{{.*}} void @_ZN7lambdas7LambdasEPc
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void Lambdas(char *ptr) {
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auto L1 = [](void *const p __attribute__((pass_object_size(0)))) {
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return __builtin_object_size(p, 0);
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};
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int i = 0;
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auto L2 = [&i](void *const p __attribute__((pass_object_size(0)))) {
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return __builtin_object_size(p, 0) + i;
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};
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// CHECK: @llvm.objectsize
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gi = L1(ptr);
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// CHECK: @llvm.objectsize
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gi = L2(ptr);
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}
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// CHECK-DAG: define internal i64 @"_ZZN7lambdas7LambdasEPcENK3$_0clEPvU17pass_object_size0"
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// CHECK-NOT: call i64 @llvm.objectsize
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// CHECK-DAG: define internal i64 @"_ZZN7lambdas7LambdasEPcENK3$_1clEPvU17pass_object_size0"
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// CHECK-NOT: call i64 @llvm.objectsize
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}
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// This is here instead of in Sema/ because we need to check to make sure the
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// proper function is called. If it's not, we'll end up with assertion errors.
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namespace addrof {
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void OvlFoo(void *const __attribute__((pass_object_size(0)))) {}
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void OvlFoo(int *const) {}
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// CHECK: define{{.*}} void @_ZN6addrof4TestEv
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void Test() {
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// Treating parens-only calls as though they were direct is consistent with
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// how we handle other implicitly unaddressable functions (e.g. builtins).
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// CHECK: call void @_ZN6addrof6OvlFooEPvU17pass_object_size0
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(OvlFoo)(nullptr);
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// CHECK: call void @_ZN6addrof6OvlFooEPi
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(&OvlFoo)(nullptr);
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}
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}
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namespace delegate {
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struct A {
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A(void *const p __attribute__((pass_object_size(0))));
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};
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A::A(void *const p __attribute__((pass_object_size(0)))) {}
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// Ensure that we forward the size through a delegating constructor call.
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// CHECK: define{{.*}} void @_ZN8delegate1AC1EPvU17pass_object_size0({{[^,]*}}, i8*{{[^,]*}}, i64{{[^,]*}})
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// CHECK: call void @_ZN8delegate1AC2EPvU17pass_object_size0({{[^,]*}}, i8*{{[^,]*}}, i64{{[^,]*}})
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}
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namespace variadic {
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// We had an issue where variadic member/operator calls with pass_object_size
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// would cause crashes.
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struct AsCtor {
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AsCtor(const char *const c __attribute__((pass_object_size(0))), double a,
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...) {}
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};
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struct AsMember {
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void bar(const char *const c __attribute__((pass_object_size(0))), double a,
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...) {}
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void operator()(const char *const c __attribute__((pass_object_size(0))),
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double a, ...) {}
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};
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// CHECK-LABEL: define{{.*}} void @_ZN8variadic4testEv()
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void test() {
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// CHECK-RE: call{{[^@]+}}@_ZN8variadic6AsCtorC1EPKcU17pass_object_size0dz
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AsCtor("a", 1.0);
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// CHECK-RE: call{{[^@]+}}@_ZN8variadic8AsMember3barEPKcU17pass_object_size0dz
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AsMember{}.bar("a", 1.0);
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// CHECK-RE: call{{[^@]+}}@_ZN8variadic8AsMemberclEPKcU17pass_object_size0dz
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AsMember{}("a", 1.0);
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}
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}
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