[ItaniumMangle] Mangle long double as __float128 for some Power targets
GCC mangles long double like __float128 in order to support
compatibility with ABI variants which had a different interpretation of
long double.
This fixes PR23791.
llvm-svn: 239421
diff --git a/clang/test/CodeGenCXX/mangle-long-double.cpp b/clang/test/CodeGenCXX/mangle-long-double.cpp
new file mode 100644
index 0000000..4a476fb
--- /dev/null
+++ b/clang/test/CodeGenCXX/mangle-long-double.cpp
@@ -0,0 +1,10 @@
+// RUN: %clang_cc1 -triple powerpc64-unknown-linux-gnu %s -emit-llvm -o - | FileCheck %s --check-prefix=POWER64-LINUX
+// RUN: %clang_cc1 -triple powerpc-unknown-linux-gnu %s -emit-llvm -o - | FileCheck %s --check-prefix=POWER-LINUX
+// RUN: %clang_cc1 -triple powerpc64-apple-darwin9 %s -emit-llvm -o - | FileCheck %s --check-prefix=POWER64-DARWIN
+// RUN: %clang_cc1 -triple powerpc-apple-darwin9 %s -emit-llvm -o - | FileCheck %s --check-prefix=POWER-DARWIN
+
+void f(long double) {}
+// POWER64-LINUX: _Z1fg
+// POWER-LINUX: _Z1fg
+// POWER64-DARWIN: _Z1fe
+// POWER-DARWIN: _Z1fe