From 4c788699aef85965273402d082ecfc9ef84ebb05 Mon Sep 17 00:00:00 2001
From: David Nadlinger <code@klickverbot.at>
Date: Wed, 12 Jun 2013 18:10:17 +0200
Subject: [PATCH] Initial, incomplete ClassReferenceExp::toConstElem
 implementation.

Allows us to get through a Phobos build without errors.
---
 dmd2/ctfe.h  |  1 +
 gen/toir.cpp | 19 +++++++++++++++++--
 2 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/dmd2/ctfe.h b/dmd2/ctfe.h
index 0244a37b..7dc157c3 100644
--- a/dmd2/ctfe.h
+++ b/dmd2/ctfe.h
@@ -55,6 +55,7 @@ struct ClassReferenceExp : Expression
     /// Same as getFieldIndex, but checks for a direct match with the VarDeclaration
     int findFieldIndexByName(VarDeclaration *v);
 #if IN_LLVM
+    llvm::Constant* toConstElem(IRState *irs);
 #else
     dt_t **toDt(dt_t **pdt);
     dt_t **toDtI(dt_t **pdt, int offset);
diff --git a/gen/toir.cpp b/gen/toir.cpp
index defd63f7..d66b5894 100644
--- a/gen/toir.cpp
+++ b/gen/toir.cpp
@@ -43,6 +43,9 @@
 #include <math.h>
 #include <stdio.h>
 
+// Needs other includes.
+#include "ctfe.h"
+
 llvm::cl::opt<bool> checkPrintf("check-printf-calls",
     llvm::cl::desc("Validate printf call format strings against arguments"),
     llvm::cl::ZeroOrMore);
@@ -2824,7 +2827,7 @@ static LLValue* write_zeroes(LLValue* mem, unsigned start, unsigned end) {
 
 DValue* StructLiteralExp::toElem(IRState* p)
 {
-    Logger::print("StructLiteralExp::toElem: %s @ %s\n", toChars(), type->toChars());
+    IF_LOG Logger::print("StructLiteralExp::toElem: %s @ %s\n", toChars(), type->toChars());
     LOG_SCOPE;
 
     if (sinit)
@@ -2933,7 +2936,9 @@ DValue* StructLiteralExp::toElem(IRState* p)
 
 LLConstant* StructLiteralExp::toConstElem(IRState* p)
 {
-    Logger::print("StructLiteralExp::toConstElem: %s @ %s\n", toChars(), type->toChars());
+    // type can legitimately be null for ClassReferenceExp::value.
+    IF_LOG Logger::print("StructLiteralExp::toConstElem: %s @ %s\n",
+        toChars(), type ? type->toChars() : "(null)");
     LOG_SCOPE;
 
     if (sinit)
@@ -2965,6 +2970,16 @@ LLConstant* StructLiteralExp::toConstElem(IRState* p)
     return sd->ir.irStruct->createInitializerConstant(varInits);
 }
 
+llvm::Constant* ClassReferenceExp::toConstElem(IRState *p)
+{
+    IF_LOG Logger::print("ClassReferenceExp::toConstElem: %s @ %s\n",
+        toChars(), type->toChars());
+    LOG_SCOPE;
+
+    // FIXME: Handle type->sym->isInterfaceDeclaration().
+    return value->toConstElem(p);
+}
+
 //////////////////////////////////////////////////////////////////////////////////////////
 
 DValue* InExp::toElem(IRState* p)