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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 `{{.*}} `.
28 lines
557 B
C++
28 lines
557 B
C++
// RUN: %clang_cc1 -triple x86_64-unknown-unknown -emit-llvm %s -o - | FileCheck %s
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class A {
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int a;
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};
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class B {
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int b;
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public:
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A *getAsA();
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};
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class X : public A, public B {
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int x;
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};
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// PR35909 - https://bugs.llvm.org/show_bug.cgi?id=35909
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A *B::getAsA() {
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return static_cast<X*>(this);
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// CHECK-LABEL: define{{.*}} %class.A* @_ZN1B6getAsAEv
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// CHECK: %[[THIS:.*]] = load %class.B*, %class.B**
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// CHECK-NEXT: %[[BC:.*]] = bitcast %class.B* %[[THIS]] to i8*
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// CHECK-NEXT: getelementptr inbounds i8, i8* %[[BC]], i64 -4
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}
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