e8147ad822
This is a standalone patch and this would help Propeller do a better job of code layout as it can accurately attribute the profiles to the right internal linkage function. This also helps SampledFDO/AutoFDO correctly associate sampled profiles to the right internal function. Currently, if there is more than one internal symbol foo, their profiles are aggregated by SampledFDO. This patch adds a new clang option, -funique-internal-funcnames, to generate unique names for functions with internal linkage. This patch appends the md5 hash of the module name to the function symbol as a best effort to generate a unique name for symbols with internal linkage. Differential Revision: https://reviews.llvm.org/D73307
62 lines
1.9 KiB
C++
62 lines
1.9 KiB
C++
// This test checks if internal linkage symbols get unique names with
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// -funique-internal-linkage-names option.
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// RUN: %clang_cc1 -triple x86_64 -x c++ -S -emit-llvm -o - < %s | FileCheck %s --check-prefix=PLAIN
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// RUN: %clang_cc1 -triple x86_64 -x c++ -S -emit-llvm -funique-internal-linkage-names -o - < %s | FileCheck %s --check-prefix=UNIQUE
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// RUN: %clang_cc1 -triple x86_64 -x c++ -S -emit-llvm -fexperimental-new-pass-manager -funique-internal-linkage-names -o - < %s | FileCheck %s --check-prefix=UNIQUE
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static int glob;
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static int foo() {
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return 0;
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}
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int (*bar())() {
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return foo;
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}
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int getGlob() {
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return glob;
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}
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// Function local static variable and anonymous namespace namespace variable.
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namespace {
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int anon_m;
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int getM() {
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return anon_m;
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}
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} // namespace
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int retAnonM() {
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static int fGlob;
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return getM() + fGlob;
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}
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// Multiversioning symbols
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__attribute__((target("default"))) static int mver() {
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return 0;
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}
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__attribute__((target("sse4.2"))) static int mver() {
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return 1;
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}
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int mver_call() {
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return mver();
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}
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// PLAIN: @_ZL4glob = internal global
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// PLAIN: @_ZZ8retAnonMvE5fGlob = internal global
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// PLAIN: @_ZN12_GLOBAL__N_16anon_mE = internal global
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// PLAIN: define internal i32 @_ZL3foov()
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// PLAIN: define internal i32 @_ZN12_GLOBAL__N_14getMEv
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// PLAIN: define weak_odr i32 ()* @_ZL4mverv.resolver()
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// PLAIN: define internal i32 @_ZL4mverv()
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// PLAIN: define internal i32 @_ZL4mverv.sse4.2()
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// UNIQUE: @_ZL4glob.{{[0-9a-f]+}} = internal global
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// UNIQUE: @_ZZ8retAnonMvE5fGlob.{{[0-9a-f]+}} = internal global
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// UNIQUE: @_ZN12_GLOBAL__N_16anon_mE.{{[0-9a-f]+}} = internal global
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// UNIQUE: define internal i32 @_ZL3foov.{{[0-9a-f]+}}()
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// UNIQUE: define internal i32 @_ZN12_GLOBAL__N_14getMEv.{{[0-9a-f]+}}
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// UNIQUE: define weak_odr i32 ()* @_ZL4mverv.resolver()
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// UNIQUE: define internal i32 @_ZL4mverv.{{[0-9a-f]+}}()
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// UNIQUE: define internal i32 @_ZL4mverv.sse4.2.{{[0-9a-f]+}}
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