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author | Jeff Cohen <jeffc@jolt-lang.org> | 2005-10-23 04:37:20 +0000 |
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committer | Jeff Cohen <jeffc@jolt-lang.org> | 2005-10-23 04:37:20 +0000 |
commit | 66c5fd6c537269eaef0f630fa14360dcaff6a295 (patch) | |
tree | 90ec39b9c89faa77f29186419eb3f67def5383b1 /examples | |
parent | 8b7f14e970d87eb52ac34e443bb508a403a2ac0d (diff) | |
download | llvm-66c5fd6c537269eaef0f630fa14360dcaff6a295.tar.gz llvm-66c5fd6c537269eaef0f630fa14360dcaff6a295.tar.bz2 llvm-66c5fd6c537269eaef0f630fa14360dcaff6a295.tar.xz |
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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23888 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'examples')
-rw-r--r-- | examples/Fibonacci/fibonacci.cpp | 3 | ||||
-rw-r--r-- | examples/HowToUseJIT/HowToUseJIT.cpp | 5 | ||||
-rw-r--r-- | examples/ParallelJIT/ParallelJIT.cpp | 6 |
3 files changed, 9 insertions, 5 deletions
diff --git a/examples/Fibonacci/fibonacci.cpp b/examples/Fibonacci/fibonacci.cpp index af17d094c3..e9d0136f4f 100644 --- a/examples/Fibonacci/fibonacci.cpp +++ b/examples/Fibonacci/fibonacci.cpp @@ -37,7 +37,8 @@ using namespace llvm; static Function *CreateFibFunction(Module *M) { // 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); diff --git a/examples/HowToUseJIT/HowToUseJIT.cpp b/examples/HowToUseJIT/HowToUseJIT.cpp index 192c76dcce..5ba8a7f1a8 100644 --- a/examples/HowToUseJIT/HowToUseJIT.cpp +++ b/examples/HowToUseJIT/HowToUseJIT.cpp @@ -51,7 +51,8 @@ int main() { // 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. @@ -76,7 +77,7 @@ int main() { // Now we going to create function `foo', which returns an int and takes no // arguments. - Function *FooF = M->getOrInsertFunction("foo", Type::IntTy, 0); + Function *FooF = M->getOrInsertFunction("foo", Type::IntTy, (Type *)0); // Add a basic block to the FooF function. BB = new BasicBlock("EntryBlock", FooF); diff --git a/examples/ParallelJIT/ParallelJIT.cpp b/examples/ParallelJIT/ParallelJIT.cpp index 5c605c002e..56ace0322e 100644 --- a/examples/ParallelJIT/ParallelJIT.cpp +++ b/examples/ParallelJIT/ParallelJIT.cpp @@ -33,7 +33,8 @@ static Function* createAdd1(Module* M) // 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 @@ static Function *CreateFibFunction(Module *M) { // 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); |