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fa9874c33b
It now includes a fix to not mark available_externally definitions as dso_local. Original message: Start setting dso_local in clang. This starts adding dso_local to clang. The hope is to eventually have TargetMachine::shouldAssumeDsoLocal go away. My objective for now is to move enough of it to clang to remove the need for the TargetMachine one to handle PIE copy relocations and -fno-plt. With that it should then be easy to implement a -fno-copy-reloc in clang. This patch just adds the cases where we assume a symbol to be local based on the file being compiled for an executable or a shared library. llvm-svn: 324500
60 lines
2.7 KiB
C
60 lines
2.7 KiB
C
// RUN: %clang_cc1 -triple x86_64-pc-linux -emit-llvm -mrelocation-model static %s -o - | FileCheck --check-prefix=STATIC %s
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// STATIC-DAG: @bar = external dso_local global i32
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// STATIC-DAG: @weak_bar = extern_weak dso_local global i32
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// STATIC-DAG: declare dso_local void @foo()
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// STATIC-DAG: @baz = dso_local global i32 42
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// STATIC-DAG: define dso_local i32* @zed()
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// RUN: %clang_cc1 -triple x86_64-pc-linux -emit-llvm -pic-is-pie -mpie-copy-relocations %s -o - | FileCheck --check-prefix=PIE-COPY %s
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// PIE-COPY-DAG: @bar = external dso_local global i32
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// PIE-COPY-DAG: @weak_bar = extern_weak global i32
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// PIE-COPY-DAG: declare dso_local void @foo()
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// PIE-COPY-DAG: @baz = dso_local global i32 42
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// PIE-COPY-DAG: define dso_local i32* @zed()
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// RUN: %clang_cc1 -triple x86_64-pc-linux -emit-llvm -pic-is-pie %s -o - | FileCheck --check-prefix=PIE %s
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// PIE-DAG: @bar = external global i32
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// PIE-DAG: @weak_bar = extern_weak global i32
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// PIE-DAG: declare dso_local void @foo()
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// PIE-DAG: @baz = dso_local global i32 42
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// PIE-DAG: define dso_local i32* @zed()
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// RUN: %clang_cc1 -triple x86_64-pc-linux -emit-llvm -mrelocation-model static -fno-plt %s -o - | FileCheck --check-prefix=NOPLT %s
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// NOPLT-DAG: @bar = external dso_local global i32
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// NOPLT-DAG: @weak_bar = extern_weak dso_local global i32
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// NOPLT-DAG: declare void @foo()
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// NOPLT-DAG: @baz = dso_local global i32 42
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// NOPLT-DAG: define dso_local i32* @zed()
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// RUN: %clang_cc1 -triple x86_64-pc-linux -emit-llvm -fno-plt -pic-is-pie -mpie-copy-relocations %s -o - | FileCheck --check-prefix=PIE-COPY-NOPLT %s
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// PIE-COPY-NOPLT-DAG: @bar = external dso_local global i32
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// PIE-COPY-NOPLT-DAG: @weak_bar = extern_weak global i32
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// PIE-COPY-NOPLT-DAG: declare void @foo()
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// PIE-COPY-NOPLT-DAG: @baz = dso_local global i32 42
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// PIE-COPY-NOPLT-DAG: define dso_local i32* @zed()
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// RUN: %clang_cc1 -triple x86_64-pc-linux -emit-llvm -pic-is-pie -fno-plt %s -o - | FileCheck --check-prefix=PIE-NO-PLT %s
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// RUN: %clang_cc1 -triple powerpc64le-pc-linux -emit-llvm -mrelocation-model static %s -o - | FileCheck --check-prefix=PIE-NO-PLT %s
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// PIE-NO-PLT-DAG: @bar = external global i32
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// PIE-NO-PLT-DAG: @weak_bar = extern_weak global i32
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// PIE-NO-PLT-DAG: declare void @foo()
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// PIE-NO-PLT-DAG: @baz = dso_local global i32 42
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// PIE-NO-PLT-DAG: define dso_local i32* @zed()
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// RUN: %clang_cc1 -triple x86_64-pc-linux -emit-llvm %s -o - | FileCheck --check-prefix=SHARED %s
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// SHARED-DAG: @bar = external global i32
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// SHARED-DAG: @weak_bar = extern_weak global i32
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// SHARED-DAG: declare void @foo()
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// SHARED-DAG: @baz = global i32 42
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// SHARED-DAG: define i32* @zed()
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extern int bar;
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__attribute__((weak)) extern int weak_bar;
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void foo(void);
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int baz = 42;
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int *zed() {
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foo();
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return baz ? &weak_bar : &bar;
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}
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