Darwin x86_32: Ignore arrays of empty structures inside records.

 - This eliminates 5/1000 failures on return-types-32, on the current
   ABITest config.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@71250 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 7 insertions, 0 deletions

diff --git a/lib/CodeGen/CGCall.cpp b/lib/CodeGen/CGCall.cpp
index 27322525bb..e9f2bba303 100644
--- a/lib/CodeGen/CGCall.cpp
+++ b/lib/CodeGen/CGCall.cpp
@@ -350,6 +350,13 @@ bool X86_32ABIInfo::shouldReturnTypeInRegister(QualType Ty,
     if (isEmptyRecord(Context, FD->getType()))
       continue;
 
+    // As are arrays of empty structures, but not generally, so we
+    // can't add this test higher in this routine.
+    if (const ConstantArrayType *AT = 
+        Context.getAsConstantArrayType(FD->getType()))
+      if (isEmptyRecord(Context, AT->getElementType()))
+        continue;
+
     // Check fields recursively.
     if (!shouldReturnTypeInRegister(FD->getType(), Context))
       return false;