[llvm-branch-commits] [compiler-rt] [llvm] [libcxxabi] [lld] [libc] [libcxx] [lldb] [flang] [openmp] [clang-tools-extra] [mlir] [clang] [clang] Support __attribute__((ifunc(...))) on Darwin platforms (PR #73687)

[Jon Roelofs via llvm-branch-commits]

https://github.com/jroelofs updated https://github.com/llvm/llvm-project/pull/73687

>From aeb39b92bbd7670fb8c6b9e76a456a92199691b3 Mon Sep 17 00:00:00 2001
From: Jon Roelofs <jonathan_roelofs at apple.com>
Date: Wed, 29 Nov 2023 12:23:46 -0800
Subject: [PATCH] adjust tests per review feedback

Created using spr 1.3.4
---
 clang/test/CodeGen/attr-ifunc.c               | 20 +++++++++++++++++++
 clang/test/CodeGen/attr-ifunc.cpp             |  4 ++++
 .../CodeGenCXX/externc-ifunc-resolver.cpp     |  2 ++
 clang/test/SemaCXX/externc-ifunc-resolver.cpp |  4 ++++
 4 files changed, 30 insertions(+)

diff --git a/clang/test/CodeGen/attr-ifunc.c b/clang/test/CodeGen/attr-ifunc.c
index 4f8fe13530fdb7..2ad41edf20dfa0 100644
--- a/clang/test/CodeGen/attr-ifunc.c
+++ b/clang/test/CodeGen/attr-ifunc.c
@@ -1,6 +1,7 @@
 // RUN: %clang_cc1 -triple x86_64-windows -fsyntax-only -verify %s
 // RUN: %clang_cc1 -triple x86_64-linux -fsyntax-only -verify -emit-llvm-only -DCHECK_ALIASES %s
 // RUN: %clang_cc1 -triple x86_64-linux -fsyntax-only -verify -emit-llvm-only %s
+// RUN: %clang_cc1 -triple x86_64-apple-macosx -fsyntax-only -verify -emit-llvm-only %s
 
 #if defined(_WIN32)
 void foo(void) {}
@@ -36,6 +37,25 @@ void *f6_resolver(void) __attribute__((ifunc("f6_resolver_resolver")));
 void f6(void) __attribute__((ifunc("f6_resolver")));
 // expected-error at -1 {{ifunc must point to a defined function}}
 
+#elif defined(__APPLE__)
+
+// NOTE: aliases are not supported on Darwin, so the above tests are not relevant.
+
+#define STR2(X) #X
+#define STR(X) STR2(X)
+#define PREFIX STR(__USER_LABEL_PREFIX__)
+
+void f1a(void) __asm("f1");
+void f1a(void) {}
+// expected-note at -1 {{previous definition is here}}
+void f1(void) __attribute__((ifunc(PREFIX "f1_ifunc"))) __asm("f1");
+// expected-error at -1 {{definition with same mangled name '<U+0001>f1' as another definition}}
+void *f1_ifunc(void) { return 0; }
+
+void *f6_ifunc(int i);
+void __attribute__((ifunc(PREFIX "f6_ifunc"))) f6(void) {}
+// expected-error at -1 {{definition 'f6' cannot also be an ifunc}}
+
 #else
 void f1a(void) __asm("f1");
 void f1a(void) {}
diff --git a/clang/test/CodeGen/attr-ifunc.cpp b/clang/test/CodeGen/attr-ifunc.cpp
index 5b5b2c14b4074b..b6e342df46eb58 100644
--- a/clang/test/CodeGen/attr-ifunc.cpp
+++ b/clang/test/CodeGen/attr-ifunc.cpp
@@ -1,5 +1,9 @@
 // RUN: %clang_cc1 -triple x86_64-linux -fsyntax-only -verify -emit-llvm-only %s
+// RUN: %clang_cc1 -triple x86_64-apple-macosx -fsyntax-only -verify -emit-llvm-only %s
+// RUN: %clang_cc1 -triple arm64-apple-macosx -fsyntax-only -verify -emit-llvm-only %s
 // RUN: not %clang_cc1 -triple x86_64-linux -emit-llvm-only -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s
+// RUN: not %clang_cc1 -triple x86_64-apple-macosx -emit-llvm-only -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s
+// RUN: not %clang_cc1 -triple arm64-apple-macosx -emit-llvm-only -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s
 
 void *f1_ifunc(void) { return nullptr; }
 void f1(void) __attribute__((ifunc("f1_ifunc")));
diff --git a/clang/test/CodeGenCXX/externc-ifunc-resolver.cpp b/clang/test/CodeGenCXX/externc-ifunc-resolver.cpp
index 0518a8dcc831dd..be4453ae7eb08c 100644
--- a/clang/test/CodeGenCXX/externc-ifunc-resolver.cpp
+++ b/clang/test/CodeGenCXX/externc-ifunc-resolver.cpp
@@ -1,4 +1,6 @@
 // RUN: %clang_cc1 -triple x86_64-linux-gnu -emit-llvm -o - %s | FileCheck %s
+// RUN: %clang_cc1 -triple x86_64-apple-macosx -emit-llvm -o - %s | FileCheck %s
+// RUN: %clang_cc1 -triple arm64-apple-macosx -emit-llvm -o - %s | FileCheck %s
 
 extern "C" {
 __attribute__((used)) static void *resolve_foo() { return 0; }
diff --git a/clang/test/SemaCXX/externc-ifunc-resolver.cpp b/clang/test/SemaCXX/externc-ifunc-resolver.cpp
index aa44525bde2cae..6c6c262c5f09d8 100644
--- a/clang/test/SemaCXX/externc-ifunc-resolver.cpp
+++ b/clang/test/SemaCXX/externc-ifunc-resolver.cpp
@@ -1,5 +1,9 @@
 // RUN: %clang_cc1 -emit-llvm-only -triple x86_64-linux-gnu -verify %s
+// RUN: %clang_cc1 -emit-llvm-only -triple x86_64-apple-macosx -verify %s
+// RUN: %clang_cc1 -emit-llvm-only -triple arm64-apple-macosx -verify %s
 // RUN: not %clang_cc1 -triple x86_64-linux -emit-llvm-only -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s
+// RUN: not %clang_cc1 -triple x86_64-apple-macosx -emit-llvm-only -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s
+// RUN: not %clang_cc1 -triple arm64-apple-macosx -emit-llvm-only -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s
 
 extern "C" {
 __attribute__((used)) static void *resolve_foo() { return 0; }