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.
43 lines
834 B
C
43 lines
834 B
C
// REQUIRES: systemz-registered-target
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// RUN: %clang_cc1 %s -emit-llvm -fzos-extensions -triple s390x-none-zos -fvisibility=hidden -o - | FileCheck %s
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// Testing pragma export after decl.
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void f0(void) {}
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int v0;
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int vd = 2;
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#pragma export(f0)
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#pragma export(v0)
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#pragma export(vd)
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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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void f1(void) {}
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int v1;
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void f2(void);
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void t0(void) { f2();}
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#pragma export(f2)
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void f2(void) {}
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int func() {
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int local;
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int l2;
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return local+l2;
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}
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int local = 2;
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int l2 =4;
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// CHECK: @vd = hidden global i32
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// CHECK: @local = hidden global i32
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// CHECK: @l2 = hidden global i32
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// CHECK: @v0 = global i32
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// CHECK: @v1 = global i32
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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 @t0()
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// CHECK: define void @f2()
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