d3b01bc7c6
This adds support for the tls_model attribute. This allows the user to
choose a TLS model that is better than what LLVM would select by
default. For example, a variable might be declared as:
__thread int x __attribute__((tls_model("initial-exec")));
if it will not be used in a shared library that is dlopen'ed.
This depends on LLVM r159077.
llvm-svn: 159078
31 lines
990 B
C
31 lines
990 B
C
// RUN: %clang_cc1 -triple i686-pc-linux-gnu -emit-llvm -o - %s | FileCheck %s
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// CHECK: @b = external thread_local global
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// CHECK: @d.e = internal thread_local global
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// CHECK: @d.f = internal thread_local global
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// CHECK: @f.a = internal thread_local(initialexec) global
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// CHECK: @a = thread_local global
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// CHECK: @g = thread_local global
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// CHECK: @h = thread_local(localdynamic) global
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// CHECK: @i = thread_local(initialexec) global
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// CHECK: @j = thread_local(localexec) global
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__thread int a;
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extern __thread int b;
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int c() { return *&b; }
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int d() {
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__thread static int e;
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__thread static union {float a; int b;} f = {.b = 1};
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return 0;
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}
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__thread int g __attribute__((tls_model("global-dynamic")));
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__thread int h __attribute__((tls_model("local-dynamic")));
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__thread int i __attribute__((tls_model("initial-exec")));
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__thread int j __attribute__((tls_model("local-exec")));
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int f() {
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__thread static int a __attribute__((tls_model("initial-exec")));
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return a++;
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}
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