Handle va_arg on struct types for the le32 target (PNaCl and Emscripten)
PNaCl and Emscripten can both handle va_arg IR instructions with
struct type.
Also add a test to cover generating a va_arg IR instruction from
va_arg in C on le32 (as already handled by VisitVAArgExpr() in
CGExprScalar.cpp), which was not covered by a test before.
(This fixes https://code.google.com/p/nativeclient/issues/detail?id=2381)
Differential Revision: http://llvm-reviews.chandlerc.com/D2539
llvm-svn: 199830
diff --git a/clang/lib/CodeGen/CGExprAgg.cpp b/clang/lib/CodeGen/CGExprAgg.cpp
index 3395bd7..ef56c0b 100644
--- a/clang/lib/CodeGen/CGExprAgg.cpp
+++ b/clang/lib/CodeGen/CGExprAgg.cpp
@@ -935,7 +935,11 @@
llvm::Value *ArgPtr = CGF.EmitVAArg(ArgValue, VE->getType());
if (!ArgPtr) {
- CGF.ErrorUnsupported(VE, "aggregate va_arg expression");
+ // If EmitVAArg fails, we fall back to the LLVM instruction.
+ llvm::Value *Val =
+ Builder.CreateVAArg(ArgValue, CGF.ConvertType(VE->getType()));
+ if (!Dest.isIgnored())
+ Builder.CreateStore(Val, Dest.getAddr());
return;
}