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Use malloc to allocate storage for task parameters on Windows.

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Fixes bug #55.  A number of tests were crashing on Windows due to the task
launch code using alloca to allocate space for the tasks' parameters.  On
Windows, the stack isn't generally big enough for this to be a good idea.
Also added an alignment parmaeter to ISPCMalloc() to pass the alignment
requirement along.
This commit is contained in:
Matt Pharr
2011-07-06 05:53:25 -07:00
parent 4d733af3c7
commit 6e4c165c7e
8 changed files with 80 additions and 14 deletions
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7
builtins.cpp
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@@ -516,11 +516,12 @@ DefineStdlib(SymbolTable *symbolTable, llvm::LLVMContext *ctx, llvm::Module *mod
FATAL("logic error");
}
// Add a declaration of void *ISPCMalloc(int64_t). The user is
// responsible for linking in a definition of this if it's needed by
// the compiled program.
// Add a declaration of void *ISPCMalloc(int64_t size, int alignment).
// The user is responsible for linking in a definition of this if it's
// needed by the compiled program.
{ std::vector<const llvm::Type *> argTypes;
argTypes.push_back(llvm::Type::getInt64Ty(*ctx));
argTypes.push_back(llvm::Type::getInt32Ty(*ctx));
llvm::FunctionType *ftype = llvm::FunctionType::get(LLVMTypes::VoidPointerType,
argTypes, false);
llvm::Function *func =