7638c1df0e
Implement the export pragma that is used in the z/OS XL C/C++ compiler
to indicate that an external symbol is to be exported from the shared
library. The syntax for the pragma is:
```
'#pragma' 'export' '(' name ')'
```
For C++ if `name` is a function it needs to be declared `extern "C"`.
See the following for the XL documentation:
- https://www.ibm.com/docs/en/zos/3.1.0?topic=descriptions-pragma-export
This code was originally in PR
https://github.com/llvm/llvm-project/pull/111035. I have split it out
into separate PRs so the code for #pragma export is in one PR and the
code for _Export keyword is in another. See that original PR for earlier
comments.
70 lines
1.9 KiB
C++
70 lines
1.9 KiB
C++
// REQUIRES: systemz-registered-target
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// RUN: %clang_cc1 -x c++ %s -emit-llvm -triple s390x-none-zos -fzos-extensions -fvisibility=hidden -o - | FileCheck %s
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// Testing pragma export after decl.
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extern "C" void f0(void) {}
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int v0;
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#pragma export(f0)
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#pragma export(v0)
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// Testing pragma export before decl.
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#pragma export(f1)
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#pragma export(v1)
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extern "C" void f1(void) {}
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int v1;
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// Testing overloaded functions.
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#pragma export(f2)
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void f2(double, double) {}
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extern "C" void f2(int) {}
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void f2(int, int) {}
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extern "C" void f3(double) {}
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void f3(int, double) {}
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void f3(double, double) {}
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#pragma export(f3)
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extern "C" void f2b(void) {}
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void t0(void) {
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f2b();
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}
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// Testing pragma export after decl and usage.
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#pragma export(f2b)
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// Testing pragma export with namespace.
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extern "C" void f5(void) {}
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extern "C" void f5a(void) {}
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namespace N0 {
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void f5(void) {}
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#pragma export(f5)
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#pragma export(f5a)
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void f5a(void) {}
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} // namespace N0
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void f10(int);
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#pragma export(f10)
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extern "C" void f10(double) {}
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void f10(int) {}
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// CHECK: @v0 = hidden global i32 0
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// CHECK: @v1 = global i32 0
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// CHECK: define hidden void @f0()
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// CHECK: define void @f1()
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// CHECK: define hidden void @_Z2f2dd(double noundef %0, double noundef %1)
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// CHECK: define void @f2(i32 noundef signext %0)
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// CHECK: define hidden void @_Z2f2ii(i32 noundef signext %0, i32 noundef signext %1)
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// CHECK: define hidden void @f3(double noundef %0)
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// CHECK: define hidden void @_Z2f3id(i32 noundef signext %0, double noundef %1)
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// CHECK: define hidden void @_Z2f3dd(double noundef %0, double noundef %1)
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// CHECK: define hidden void @f2b()
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// CHECK: define hidden void @_Z2t0v()
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// CHECK: define hidden void @f5()
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// CHECK: define hidden void @f5a()
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// CHECK: define hidden void @_ZN2N02f5Ev()
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// CHECK: define hidden void @_ZN2N03f5aEv()
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// CHECK: define void @f10(double noundef %0)
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// CHECK: define hidden void @_Z3f10i(i32 noundef signext %0)
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