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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 `{{.*}} `.
17 lines
496 B
C++
17 lines
496 B
C++
// RUN: %clang_cc1 -triple i686-linux-gnu -std=c++11 -S -emit-llvm -o - %s | FileCheck %s
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//
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// Regression test for the issue reported at
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// https://reviews.llvm.org/D78162#1986104
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typedef unsigned long size_t;
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extern "C" __inline__ __attribute__((__gnu_inline__)) void *memcpy(void *a, const void *b, unsigned c) {
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return __builtin_memcpy(a, b, c);
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}
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void *memcpy(void *, const void *, unsigned);
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// CHECK-LABEL: define{{.*}} void @_Z1av
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void a() { (void)memcpy; }
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// CHECK-NOT: nobuiltin
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