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789a46f2d7
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
37 lines
1.4 KiB
C
37 lines
1.4 KiB
C
// RUN: %clang_cc1 -triple aarch64 -emit-llvm %s -o - | FileCheck %s
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// RUN: %clang_cc1 -triple x86_64 -emit-llvm %s -fpatchable-function-entry=1 -o - | FileCheck --check-prefixes=CHECK,OPT %s
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// CHECK: define dso_local void @f0() #0
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__attribute__((patchable_function_entry(0))) void f0() {}
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// CHECK: define dso_local void @f00() #0
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__attribute__((patchable_function_entry(0, 0))) void f00() {}
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// CHECK: define dso_local void @f2() #1
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__attribute__((patchable_function_entry(2))) void f2() {}
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// CHECK: define dso_local void @f20() #1
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__attribute__((patchable_function_entry(2, 0))) void f20() {}
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// CHECK: define dso_local void @f20decl() #1
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__attribute__((patchable_function_entry(2, 0))) void f20decl();
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void f20decl() {}
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// CHECK: define dso_local void @f44() #2
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__attribute__((patchable_function_entry(4, 4))) void f44() {}
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// CHECK: define dso_local void @f52() #3
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__attribute__((patchable_function_entry(5, 2))) void f52() {}
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// OPT: define dso_local void @f() #4
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void f() {}
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/// No need to emit "patchable-function-entry"="0"
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// CHECK: attributes #0 = { {{.*}}
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// CHECK-NOT: "patchable-function-entry"
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// CHECK: attributes #1 = { {{.*}} "patchable-function-entry"="2"
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// CHECK: attributes #2 = { {{.*}} "patchable-function-entry"="0" "patchable-function-prefix"="4"
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// CHECK: attributes #3 = { {{.*}} "patchable-function-entry"="3" "patchable-function-prefix"="2"
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// OPT: attributes #4 = { {{.*}} "patchable-function-entry"="1"
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