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 `{{.*}} `.
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{{.*}} void @f0() #0
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__attribute__((patchable_function_entry(0))) void f0() {}
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// CHECK: define{{.*}} void @f00() #0
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__attribute__((patchable_function_entry(0, 0))) void f00() {}
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// CHECK: define{{.*}} void @f2() #1
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__attribute__((patchable_function_entry(2))) void f2() {}
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// CHECK: define{{.*}} void @f20() #1
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__attribute__((patchable_function_entry(2, 0))) void f20() {}
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// CHECK: define{{.*}} 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{{.*}} void @f44() #2
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__attribute__((patchable_function_entry(4, 4))) void f44() {}
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// CHECK: define{{.*}} void @f52() #3
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__attribute__((patchable_function_entry(5, 2))) void f52() {}
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// OPT: define{{.*}} 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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