Basic: fix profiling with GNU EABI

The GNU profiling support indicates that the interface is `_mcount` rather than
`mcount`.  Conditionalise the behaviour according to the `-meabi gnu` flag.

Resolves PR27311

llvm-svn: 266039

2 files changed, 25 insertions, 11 deletions

diff --git a/clang/lib/Basic/Targets.cpp b/clang/lib/Basic/Targets.cpp
index b6253de1570..7639b04d25a 100644
--- a/clang/lib/Basic/Targets.cpp
+++ b/clang/lib/Basic/Targets.cpp
@@ -5464,6 +5464,10 @@ public:
 
     // AArch64 targets default to using the ARM C++ ABI.
     TheCXXABI.set(TargetCXXABI::GenericAArch64);
+
+    if (Triple.getOS() == llvm::Triple::Linux ||
+        Triple.getOS() == llvm::Triple::UnknownOS)
+      this->MCountName = Opts.EABIVersion == "gnu" ? "\01_mcount" : "mcount";
   }
 
   StringRef getABI() const override { return ABI; }
diff --git a/clang/test/Frontend/gnu-mcount.c b/clang/test/Frontend/gnu-mcount.c
index a5100174303..c279b89ddad 100644
--- a/clang/test/Frontend/gnu-mcount.c
+++ b/clang/test/Frontend/gnu-mcount.c
@@ -1,23 +1,23 @@
 // RUN: %clang -target armv7-unknown-none-eabi -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM-EABI
 // RUN: %clang -target armv7-unknown-none-eabi -pg -meabi gnu -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM-EABI-MEABI-GNU
 // RUN: %clang -target aarch64-unknown-none-eabi -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI
-// RUN: %clang -target aarch64-unknown-none-eabi -pg -meabi gnu -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI
+// RUN: %clang -target aarch64-unknown-none-eabi -pg -meabi gnu -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI-MEABI-GNU
 // RUN: %clang -target armv7-unknown-linux-gnueabi -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM-EABI
 // RUN: %clang -target armv7-unknown-linux-gnueabi -meabi gnu -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM-EABI-MEABI-GNU
 // RUN: %clang -target aarch64-unknown-linux-gnueabi -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI
-// RUN: %clang -target aarch64-unknown-linux-gnueabi -meabi gnu -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI
+// RUN: %clang -target aarch64-unknown-linux-gnueabi -meabi gnu -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI-MEABI-GNU
 // RUN: %clang -target armv7-unknown-linux-gnueabihf -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM-EABI
 // RUN: %clang -target armv7-unknown-linux-gnueabihf -meabi gnu -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM-EABI-MEABI-GNU
 // RUN: %clang -target aarch64-unknown-linux-gnueabihf -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI
-// RUN: %clang -target aarch64-unknown-linux-gnueabihf -meabi gnu -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI
+// RUN: %clang -target aarch64-unknown-linux-gnueabihf -meabi gnu -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI-MEABI-GNU
 // RUN: %clang -target armv7-unknown-freebsd-gnueabihf -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM-EABI-FREEBSD
 // RUN: %clang -target armv7-unknown-freebsd-gnueabihf -meabi gnu -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM-EABI-FREEBSD
 // RUN: %clang -target aarch64-unknown-freebsd-gnueabihf -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI-FREEBSD
 // RUN: %clang -target aarch64-unknown-freebsd-gnueabihf -meabi gnu -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI-FREEBSD
 // RUN: %clang -target armv7-unknown-openbsd-gnueabihf -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM-EABI-OPENBSD
 // RUN: %clang -target armv7-unknown-openbsd-gnueabihf -meabi gnu -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM-EABI-OPENBSD
-// RUN: %clang -target aarch64-unknown-openbsd-gnueabihf -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI
-// RUN: %clang -target aarch64-unknown-openbsd-gnueabihf -meabi gnu -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI
+// RUN: %clang -target aarch64-unknown-openbsd-gnueabihf -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI-OPENBSD
+// RUN: %clang -target aarch64-unknown-openbsd-gnueabihf -meabi gnu -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI-OPENBSD
 // RUN: %clang -target armv7-unknown-netbsd-gnueabihf -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM-EABI-NETBSD
 // RUN: %clang -target armv7-unknown-netbsd-gnueabihf -meabi gnu -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM-EABI-NETBSD
 // RUN: %clang -target aarch64-unknown-netbsd-gnueabihf -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI-NETBSD
@@ -28,16 +28,16 @@
 // RUN: %clang -target arm64-apple-ios -pg -meabi gnu -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM-IOS
 // RUN: %clang -target armv7-unknown-bitrig-gnueabihf -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM-EABI-BIGRIG
 // RUN: %clang -target armv7-unknown-bitrig-gnueabihf -meabi gnu -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM-EABI-BIGRIG
-// RUN: %clang -target aarch64-unknown-bitrig-gnueabihf -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI
-// RUN: %clang -target aarch64-unknown-bitrig-gnueabihf -meabi gnu -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI
+// RUN: %clang -target aarch64-unknown-bitrig-gnueabihf -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI-BITRIG
+// RUN: %clang -target aarch64-unknown-bitrig-gnueabihf -meabi gnu -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI-BITRIG
 // RUN: %clang -target armv7-unknown-rtems-gnueabihf -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM-EABI-RTEMS
 // RUN: %clang -target armv7-unknown-rtems-gnueabihf -meabi gnu -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM-EABI-RTEMS
-// RUN: %clang -target aarch64-unknown-rtems-gnueabihf -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI
-// RUN: %clang -target aarch64-unknown-rtems-gnueabihf -meabi gnu -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI
+// RUN: %clang -target aarch64-unknown-rtems-gnueabihf -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI-RTEMS
+// RUN: %clang -target aarch64-unknown-rtems-gnueabihf -meabi gnu -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI-RTEMS
 // RUN: %clang -target armv7-unknown-cloudabi-gnueabihf -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM-EABI-CLOUDABI
 // RUN: %clang -target armv7-unknown-cloudabi-gnueabihf -meabi gnu -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM-EABI-CLOUDABI
-// RUN: %clang -target aarch64-unknown-cloudabi-gnueabihf -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI
-// RUN: %clang -target aarch64-unknown-cloudabi-gnueabihf -meabi gnu -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI
+// RUN: %clang -target aarch64-unknown-cloudabi-gnueabihf -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI-CLOUDABI
+// RUN: %clang -target aarch64-unknown-cloudabi-gnueabihf -meabi gnu -pg -S -emit-llvm -o - %s | FileCheck %s -check-prefix CHECK -check-prefix CHECK-ARM64-EABI-CLOUDABI
 
 int f() {
   return 0;
@@ -49,6 +49,7 @@ int f() {
 // CHECK-ARM-EABI: call void @"\01mcount"()
 // CHECK-ARM-EABI-NOT: call void @"\01__gnu_mcount_nc"()
 // CHECK-ARM64-EABI: call void @mcount()
+// CHECK-ARM64-EABI-MEABI-GNU: call void @"\01_mcount"()
 // CHECK-ARM64-EABI-NOT: call void @"\01__gnu_mcount_nc"()
 // CHECK-ARM-EABI-FREEBSD: call void @__mcount()
 // CHECK-ARM-EABI-FREEBSD-NOT: call void @"\01__gnu_mcount_nc"()
@@ -58,11 +59,20 @@ int f() {
 // CHECK-ARM-EABI-NETBSD-NOT: call void @"\01__gnu_mcount_nc"()
 // CHECK-ARM-EABI-OPENBSD: call void @__mcount()
 // CHECK-ARM-EABI-OPENBSD-NOT: call void @"\01__gnu_mcount_nc"()
+// CHECK-ARM64-EABI-OPENBSD: call void @mcount()
+// CHECK-ARM64-EABI-OPENBSD-NOT: call void @"\01__gnu_mcount_nc"()
 // CHECK-ARM-EABI-MEABI-GNU-NOT: call void @mcount()
 // CHECK-ARM-EABI-MEABI-GNU: call void @"\01__gnu_mcount_nc"()
 // CHECK-ARM-EABI-BITRIG: call void @__mcount()
 // CHECK-ARM-EABI-BITRIG-NOT: call void @"\01__gnu_mcount_nc"()
+// CHECK-ARM54-EABI-BITRIG: call void @mcount()
+// CHECK-ARM54-EABI-BITRIG-NOT: call void @"\01__gnu_mcount_nc"()
 // CHECK-ARM-EABI-RTEMS: call void @mcount()
 // CHECK-ARM-EABI-RTEMS-NOT: call void @"\01__gnu_mcount_nc"()
+// CHECK-ARM64-EABI-RTEMS: call void @mcount()
+// CHECK-ARM64-EABI-RTEMS-NOT: call void @"\01__gnu_mcount_nc"()
 // CHECK-ARM-EABI-CLOUDABI: call void @mcount()
 // CHECK-ARM-EABI-CLOUDABI-NOT: call void @"\01__gnu_mcount_nc"()
+// CHECK-ARM64-EABI-CLOUDABI: call void @mcount()
+// CHECK-ARM64-EABI-CLOUDABI-NOT: call void @"\01__gnu_mcount_nc"()
+