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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 `{{.*}} `.
42 lines
1.3 KiB
C++
42 lines
1.3 KiB
C++
// RUN: %clang_cc1 -triple=x86_64-linux-gnu -emit-llvm -o - %s | FileCheck %s
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// CHECK: @defn ={{.*}} global i32 undef
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int defn [[clang::loader_uninitialized]];
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// CHECK: @_ZL11defn_static = internal global i32 undef
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static int defn_static [[clang::loader_uninitialized]] __attribute__((used));
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// CHECK: @_ZZ4funcvE4data = internal global i32 undef
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int* func(void)
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{
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static int data [[clang::loader_uninitialized]];
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return &data;
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}
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class trivial
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{
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float x;
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};
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// CHECK: @ut ={{.*}} global %class.trivial undef
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trivial ut [[clang::loader_uninitialized]];
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// CHECK: @arr ={{.*}} global [32 x double] undef
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double arr[32] __attribute__((loader_uninitialized));
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// Defining as arr2[] [[clang..]] raises the error: attribute cannot be applied to types
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// CHECK: @arr2 ={{.*}} global [4 x double] undef
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double arr2 [[clang::loader_uninitialized]] [4];
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template<typename T> struct templ{T * t;};
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// CHECK: @templ_int ={{.*}} global %struct.templ undef
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templ<int> templ_int [[clang::loader_uninitialized]];
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// CHECK: @templ_trivial ={{.*}} global %struct.templ.0 undef
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templ<trivial> templ_trivial [[clang::loader_uninitialized]];
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// CHECK: @templ_incomplete ={{.*}} global %struct.templ.1 undef
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struct incomplete;
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templ<incomplete> templ_incomplete [[clang::loader_uninitialized]];
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