fd739804e0
For a default visibility external linkage definition, dso_local is set for ELF
-fno-pic/-fpie and COFF and Mach-O. Since default clang -cc1 for ELF is similar
to -fpic ("PIC Level" is not set), this nuance causes unneeded binary format differences.
To make emitted IR similar, ELF -cc1 -fpic will default to -fno-semantic-interposition,
which sets dso_local for default visibility external linkage definitions.
To make this flip smooth and enable future (dso_local as definition default),
this patch replaces (function) `define ` with `define{{.*}} `,
(variable/constant/alias) `= ` with `={{.*}} `, or inserts appropriate `{{.*}} `.
25 lines
873 B
C
25 lines
873 B
C
// RUN: %clang_cc1 -triple x86_64-pc-linux-gnu -emit-llvm -fms-extensions -Wno-ignored-attributes -Wno-extern-initializer -o - %s | FileCheck %s -check-prefix CHECK-LNX
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// RUN: %clang_cc1 -triple x86_64-pc-windows-msvc -emit-llvm -fms-extensions -o - -DMSVC %s | FileCheck %s -check-prefix CHECK-MSVC
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// Export const variable.
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// CHECK-MSVC: @x = dso_local dllexport constant i32 3, align 4
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// CHECK-LNX: @x ={{.*}} constant i32 3, align 4
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// CHECK-MSVC: @z = dso_local constant i32 4, align 4
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// CHECK-LNX: @z ={{.*}} constant i32 4, align 4
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// CHECK-MSVC: @y = dso_local dllexport constant i32 0, align 4
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// CHECK-LNX: @y ={{.*}} constant i32 0, align 4
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__declspec(dllexport) int const x = 3;
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__declspec(dllexport) const int y;
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// expected-warning@+1 {{'extern' variable has an initializer}}
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extern int const z = 4;
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int main() {
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int a = x + y + z;
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return a;
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}
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