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.
25 lines
578 B
C
25 lines
578 B
C
// RUN: %clang_cc1 -triple x86_64-apple-darwin -emit-llvm -o - %s | FileCheck %s
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#pragma GCC visibility push(hidden)
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int x = 2;
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// CHECK: @x = hidden global
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extern int y;
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#pragma GCC visibility pop
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int y = 4;
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// CHECK: @y = hidden global
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#pragma GCC visibility push(hidden)
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extern __attribute((visibility("default"))) int z;
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int z = 0;
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// CHECK: @z ={{.*}} global
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#pragma GCC visibility pop
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#pragma GCC visibility push(hidden)
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void f() {}
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// CHECK-LABEL: define hidden void @f
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__attribute((visibility("default"))) void g();
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void g() {}
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// CHECK-LABEL: define{{.*}} void @g
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