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 `{{.*}} `.
36 lines
1.2 KiB
C
36 lines
1.2 KiB
C
// RUN: %clang_cc1 -triple i686-pc-linux-gnu -emit-llvm -o - %s | FileCheck %s
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// RUN: %clang_cc1 -triple riscv32 -emit-llvm -o - %s | FileCheck %s
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// RUN: %clang_cc1 -triple riscv64 -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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// CHECK-NOT: @_ZTW
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// CHECK-NOT: @_ZTH
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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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