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If we support structs as va_list, we must pass pointers to them to va_copy

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See last commit for LangRef, this implements it on all targets.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22273 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andrew Lenharth
2005-06-22 21:04:42 +00:00
parent d0a4c62a03
commit 213e557cef
9 changed files with 43 additions and 66 deletions
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12
lib/Bytecode/Reader/ReaderWrappers.cpp
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@ -221,20 +221,24 @@ static ModuleProvider* CheckVarargs(ModuleProvider* MP) {
//foo = vacopy(bar)
// ->
//a = alloca 1 of typeof(foo)
//vacopy(a, bar)
//b = alloca 1 of typeof(foo)
//store bar -> b
//vacopy(a, b)
//foo = load a
const Type* RetTy = Type::getPrimitiveType(Type::VoidTyID);
const Type* ArgTy = F->getFunctionType()->getReturnType();
const Type* ArgTyPtr = PointerType::get(ArgTy);
Function* NF = M->getOrInsertFunction("llvm.va_copy",
RetTy, ArgTyPtr, ArgTy, 0);
RetTy, ArgTyPtr, ArgTyPtr, 0);
for(Value::use_iterator I = F->use_begin(), E = F->use_end(); I != E;)
if (CallInst* CI = dyn_cast<CallInst>(*I++)) {
AllocaInst* a = new AllocaInst(ArgTy, 0, "vacopy.fix.1", CI);
new CallInst(NF, a, CI->getOperand(1), "", CI);
Value* foo = new LoadInst(a, "vacopy.fix.2", CI);
AllocaInst* b = new AllocaInst(ArgTy, 0, "vacopy.fix.2", CI);
new StoreInst(CI->getOperand(1), b, CI);
new CallInst(NF, a, b, "", CI);
Value* foo = new LoadInst(a, "vacopy.fix.3", CI);
CI->replaceAllUsesWith(foo);
CI->getParent()->getInstList().erase(CI);
}