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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 `{{.*}} `.
20 lines
950 B
C++
20 lines
950 B
C++
// RUN: echo "[always]" > %t.xray-attrlist
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// RUN: echo "fun:*always*" >> %t.xray-attrlist
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// RUN: echo "[never]" >> %t.xray-attrlist
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// RUN: echo "fun:*never*" >> %t.xray-attrlist
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// RUN: %clang_cc1 -fxray-instrument -x c++ -std=c++11 \
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// RUN: -fxray-attr-list=%t.xray-attrlist -emit-llvm -o - %s \
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// RUN: -triple x86_64-unknown-linux-gnu | FileCheck %s
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void always() {}
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void never() {}
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[[clang::xray_never_instrument]] void alwaysNever() {}
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[[clang::xray_always_instrument]] void neverAlways() {}
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// CHECK: define{{.*}} void @_Z6alwaysv() #[[ALWAYSATTR:[0-9]+]] {
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// CHECK: define{{.*}} void @_Z5neverv() #[[NEVERATTR:[0-9]+]] {
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// CHECK: define{{.*}} void @_Z11alwaysNeverv() #[[NEVERATTR]] {
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// CHECK: define{{.*}} void @_Z11neverAlwaysv() #[[ALWAYSATTR]] {
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// CHECK: attributes #[[ALWAYSATTR]] = {{.*}} "function-instrument"="xray-always" {{.*}}
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// CHECK: attributes #[[NEVERATTR]] = {{.*}} "function-instrument"="xray-never" {{.*}}
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