[llvm-commits] CVS: llvm/examples/ParallelJIT/ParallelJIT.cpp

Jeff Cohen jeffc at jolt-lang.org
Sat Oct 22 21:37:39 PDT 2005

Changes in directory llvm/examples/ParallelJIT:

ParallelJIT.cpp updated: 1.3 -> 1.4
Log message:

When a function takes a variable number of pointer arguments, with a zero
pointer marking the end of the list, the zero *must* be cast to the pointer
type.  An un-cast zero is a 32-bit int, and at least on x86_64, gcc will
not extend the zero to 64 bits, thus allowing the upper 32 bits to be
random junk.

The new END_WITH_NULL macro may be used to annotate a such a function
so that GCC (version 4 or newer) will detect the use of un-casted zero
at compile time.

Diffs of the changes:  (+4 -2)

 ParallelJIT.cpp |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

Index: llvm/examples/ParallelJIT/ParallelJIT.cpp
diff -u llvm/examples/ParallelJIT/ParallelJIT.cpp:1.3 llvm/examples/ParallelJIT/ParallelJIT.cpp:1.4
--- llvm/examples/ParallelJIT/ParallelJIT.cpp:1.3	Wed Jul 27 01:12:33 2005
+++ llvm/examples/ParallelJIT/ParallelJIT.cpp	Sat Oct 22 23:37:19 2005
@@ -33,7 +33,8 @@
   // Create the add1 function entry and insert this entry into module M.  The
   // function will have a return type of "int" and take an argument of "int".
   // The '0' terminates the list of argument types.
-  Function *Add1F = M->getOrInsertFunction("add1", Type::IntTy, Type::IntTy, 0);
+  Function *Add1F = M->getOrInsertFunction("add1", Type::IntTy, Type::IntTy,
+                                           (Type *)0);
   // Add a basic block to the function. As before, it automatically inserts
   // because of the last argument.
@@ -61,7 +62,8 @@
   // Create the fib function and insert it into module M.  This function is said
   // to return an int and take an int parameter.
-  Function *FibF = M->getOrInsertFunction("fib", Type::IntTy, Type::IntTy, 0);
+  Function *FibF = M->getOrInsertFunction("fib", Type::IntTy, Type::IntTy,
+                                          (Type *)0);
   // Add a basic block to the function.
   BasicBlock *BB = new BasicBlock("EntryBlock", FibF);

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