New test, see comments.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47078 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/C++Frontend/2008-02-13-sret.cpp b/test/C++Frontend/2008-02-13-sret.cpp
new file mode 100644 (file)
index 0000000..11595ba
--- /dev/null
+++ b/test/C++Frontend/2008-02-13-sret.cpp
@@ -0,0 +1,48 @@
+// RUN: %llvmgxx -S -O0 -emit-llvm %s -o - | grep retval | grep S242 | grep {i32 1} | count 2
+
+// Test that all 8 bytes of ret in check242 are copied.  llvm-gcc was
+// treating S242 as if it were S93, which does not need to have the
+// last 4 padding bytes copied.
+typedef __builtin_va_list va_list;
+typedef unsigned long size_t;
+void *memset(void *, int, size_t);
+struct S92 { int a:14; } ;
+ extern struct S92 s92;
+
+ struct S92 check92 () { struct S92 ret;
+ memset (&ret, 0, sizeof (ret));
+ ret.a = s92.a;
+ return ret; }
+
+struct S93 { __attribute__((aligned (8))) void * a; } ;
+ extern struct S93 s93;
+ struct S93 check93 () { 
+  struct S93 ret;
+ memset (&ret, 0, sizeof (ret));
+ ret.a = s93.a; 
+ return ret; }
+
+struct S242 { char * a;int b[1]; } ;
+ extern struct S242 s242;
+
+ struct S242 check242 () {
+ struct S242 ret;
+ memset (&ret, 0, sizeof (ret));
+ ret.a = s242.a;
+ ret.b[0] = s242.b[0];
+ return ret; }
+
+void check93va (int z, ...) { 
+ struct S93 arg;
+ va_list ap;
+ __builtin_va_start(ap,z);
+ arg = __builtin_va_arg(ap,struct S93);
+  __builtin_va_end(ap); }
+
+void check242va (int z, ...) { 
+struct S242 arg;
+va_list ap;
+__builtin_va_start(ap,z);
+ arg = __builtin_va_arg(ap,struct S242);
+ __builtin_va_end(ap); }
+