ARM/APCS: Fix alignment of long double.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@94685 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Basic/Targets.cpp

@@ -1240,7 +1240,7 @@ public:
     // FIXME: We need support for -meabi... we could just mangle it into the
     // name.
     if (Name == "apcs-gnu") {
-      DoubleAlign = LongLongAlign = 32;
+      DoubleAlign = LongLongAlign = LongDoubleAlign = 32;
       SizeType = UnsignedLong;
 
       if (IsThumb) {

test/Sema/arm-layout.c

@@ -0,0 +1,20 @@
+// RUN: %clang_cc1 -triple armv7-unknown-unknown -target-abi apcs-gnu %s -verify
+// RUN: %clang_cc1 -triple armv7-unknown-unknown -target-abi aapcs %s -verify
+
+#ifdef __ARM_EABI__
+
+struct s0 { char field0; double field1; };
+int g0[sizeof(struct s0) == 16 ? 1 : -1];
+
+struct s1 { char field0; long double field1; };
+int g1[sizeof(struct s1) == 16 ? 1 : -1];
+
+#else
+
+struct s0 { char field0; double field1; };
+int g0[sizeof(struct s0) == 12 ? 1 : -1];
+
+struct s1 { char field0; long double field1; };
+int g1[sizeof(struct s1) == 12 ? 1 : -1];
+
+#endif