[llvm-commits] [llvm] r126019 - in /llvm/trunk/include/llvm/ADT: PointerIntPair.h PointerUnion.h
Argyrios Kyrtzidis
akyrtzi at gmail.com
Fri Feb 18 19:55:58 PST 2011
Author: akirtzidis
Date: Fri Feb 18 21:55:58 2011
New Revision: 126019
URL: http://llvm.org/viewvc/llvm-project?rev=126019&view=rev
Log:
Allow getting the address of the value in a PointerUnion or PointerIntPair if one is
confident enough that he knows what he is doing.
Modified:
llvm/trunk/include/llvm/ADT/PointerIntPair.h
llvm/trunk/include/llvm/ADT/PointerUnion.h
Modified: llvm/trunk/include/llvm/ADT/PointerIntPair.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/ADT/PointerIntPair.h?rev=126019&r1=126018&r2=126019&view=diff
==============================================================================
--- llvm/trunk/include/llvm/ADT/PointerIntPair.h (original)
+++ llvm/trunk/include/llvm/ADT/PointerIntPair.h Fri Feb 18 21:55:58 2011
@@ -91,6 +91,13 @@
Value |= IntVal << IntShift; // Set new integer.
}
+ PointerTy const *getAddrOfPointer() const {
+ assert(Value == reinterpret_cast<intptr_t>(getPointer()) &&
+ "Can only return the address if IntBits is cleared and "
+ "PtrTraits doesn't change the pointer");
+ return reinterpret_cast<PointerTy const *>(&Value);
+ }
+
void *getOpaqueValue() const { return reinterpret_cast<void*>(Value); }
void setFromOpaqueValue(void *Val) { Value = reinterpret_cast<intptr_t>(Val);}
Modified: llvm/trunk/include/llvm/ADT/PointerUnion.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/ADT/PointerUnion.h?rev=126019&r1=126018&r2=126019&view=diff
==============================================================================
--- llvm/trunk/include/llvm/ADT/PointerUnion.h (original)
+++ llvm/trunk/include/llvm/ADT/PointerUnion.h Fri Feb 18 21:55:58 2011
@@ -107,6 +107,18 @@
if (is<T>()) return get<T>();
return T();
}
+
+ /// \brief If the union is set to the first pointer type we can get an
+ /// address pointing to it.
+ template <typename T>
+ PT1 const *getAddrOf() const {
+ assert(is<PT1>() && "Val is not the first pointer");
+ assert(get<PT1>() == Val.getPointer() &&
+ "Can't get the address because PointerLikeTypeTraits changes the ptr");
+ T const *can_only_get_address_of_first_pointer_type
+ = reinterpret_cast<PT1 const *>(Val.getAddrOfPointer());
+ return can_only_get_address_of_first_pointer_type;
+ }
/// Assignment operators - Allow assigning into this union from either
/// pointer type, setting the discriminator to remember what it came from.
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