[cfe-commits] r142863 - in /cfe/trunk: lib/CodeGen/CGExprConstant.cpp test/CodeGenCXX/const-init.cpp

[Eli Friedman]

Author: efriedma
Date: Mon Oct 24 17:25:55 2011
New Revision: 142863

URL: http://llvm.org/viewvc/llvm-project?rev=142863&view=rev
Log:
Don't try to emit CK_LValueBitCast casts as constants.  PR9558.


Modified:
    cfe/trunk/lib/CodeGen/CGExprConstant.cpp
    cfe/trunk/test/CodeGenCXX/const-init.cpp

Modified: cfe/trunk/lib/CodeGen/CGExprConstant.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGExprConstant.cpp?rev=142863&r1=142862&r2=142863&view=diff
==============================================================================
--- cfe/trunk/lib/CodeGen/CGExprConstant.cpp (original)
+++ cfe/trunk/lib/CodeGen/CGExprConstant.cpp Mon Oct 24 17:25:55 2011
@@ -573,7 +573,6 @@
     case CK_CPointerToObjCPointerCast:
     case CK_BlockPointerToObjCPointerCast:
     case CK_AnyPointerToBlockPointerCast:
-    case CK_LValueBitCast:
     case CK_BitCast:
       if (C->getType() == destType) return C;
       return llvm::ConstantExpr::getBitCast(C, destType);
@@ -589,6 +588,7 @@
     case CK_ARCConsumeObject:
     case CK_ARCReclaimReturnedObject:
     case CK_ARCExtendBlockObject:
+    case CK_LValueBitCast:
       return 0;
 
     // These might need to be supported for constexpr.

Modified: cfe/trunk/test/CodeGenCXX/const-init.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenCXX/const-init.cpp?rev=142863&r1=142862&r2=142863&view=diff
==============================================================================
--- cfe/trunk/test/CodeGenCXX/const-init.cpp (original)
+++ cfe/trunk/test/CodeGenCXX/const-init.cpp Mon Oct 24 17:25:55 2011
@@ -36,3 +36,7 @@
   double t0 = A::d;
   double t1[] = { A::d, A::f };
 }
+
+// We don't expect to fold this in the frontend, but make sure it doesn't crash.
+// CHECK: @PR9558 = global float 0.000000e+0
+float PR9558 = reinterpret_cast<const float&>("asd");