2018-01-19 23:14:51 +08:00
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// 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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[CodeGenModule] Assume dso_local for -fpic -fno-semantic-interposition
Summary:
Clang -fpic defaults to -fno-semantic-interposition (GCC -fpic defaults
to -fsemantic-interposition).
Users need to specify -fsemantic-interposition to get semantic
interposition behavior.
Semantic interposition is currently a best-effort feature. There may
still be some cases where it is not handled well.
Reviewers: peter.smith, rnk, serge-sans-paille, sfertile, jfb, jdoerfert
Subscribers: dschuff, jyknight, dylanmckay, nemanjai, jvesely, kbarton, fedor.sergeev, asb, rbar, johnrusso, simoncook, sabuasal, niosHD, jrtc27, zzheng, edward-jones, atanasyan, rogfer01, MartinMosbeck, brucehoult, the_o, arphaman, PkmX, jocewei, jsji, Jim, lenary, s.egerton, pzheng, sameer.abuasal, apazos, luismarques, cfe-commits
Tags: #clang
Differential Revision: https://reviews.llvm.org/D73865
2020-02-03 04:23:47 +08:00
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// CHECK-LABEL: define dso_local %class.A* @_ZN1B6getAsAEv
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2018-01-19 23:14:51 +08:00
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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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