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 `{{.*}} `.
36 lines
1.3 KiB
C++
36 lines
1.3 KiB
C++
// RUN: %clang_cc1 -std=c++98 -triple i386-unknown-unknown -fno-elide-constructors -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-CXX98
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// RUN: %clang_cc1 -std=c++11 -triple i386-unknown-unknown -fno-elide-constructors -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-CXX11
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// RUN: %clang_cc1 -std=c++98 -triple i386-unknown-unknown -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-CXX98-ELIDE
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// RUN: %clang_cc1 -std=c++11 -triple i386-unknown-unknown -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-CXX11-ELIDE
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// Reduced from PR12208
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class X {
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public:
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X();
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X(const X&);
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#if __cplusplus >= 201103L
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X(X&&);
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#endif
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~X();
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};
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// CHECK-LABEL: define{{.*}} void @_Z4Testv(
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X Test()
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{
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X x;
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// Check that the copy constructor for X is called with result variable as
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// sret argument.
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// CHECK-CXX98: call void @_ZN1XC1ERKS_(
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// CHECK-CXX11: call void @_ZN1XC1EOS_(
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// CHECK-CXX98-ELIDE-NOT: call void @_ZN1XC1ERKS_(
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// CHECK-CXX11-ELIDE-NOT: call void @_ZN1XC1EOS_(
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// Make sure that the destructor for X is called.
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// FIXME: This call is present even in the -ELIDE runs, but is guarded by a
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// branch that is never taken in those cases. We could generate better IR
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// here.
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// CHECK: call void @_ZN1XD1Ev(
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return x;
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}
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