implement a first hack at codegen'ing the usual unary conversions.

This allows us to compile:

int func() {
  int A[10];
  if (!A) {

to:

define i32 @func() {
entry:
        %A = alloca [10 x i32]          ; <[10 x i32]*> [#uses=1]
        %arraydecay = getelementptr [10 x i32]* %A, i32 0, i32 0                ; <i32*> [#uses=1]
        %tobool = icmp ne i32* %arraydecay, null                ; <i1> [#uses=1]
        %lnot = xor i1 %tobool, true            ; <i1> [#uses=1]
        br i1 %lnot, label %ifthen, label %ifend

-Chris

llvm-svn: 39564

clang/CodeGen/CodeGenFunction.cpp

@@ -26,6 +26,10 @@ using namespace CodeGen;
 CodeGenFunction::CodeGenFunction(CodeGenModule &cgm) 
   : CGM(cgm), Target(CGM.getContext().Target) {}
 
+ASTContext &CodeGenFunction::getContext() const {
+  return CGM.getContext();
+}
+
 
 llvm::BasicBlock *CodeGenFunction::getBasicBlockForLabel(const LabelStmt *S) {
   BasicBlock *&BB = LabelMap[S];
@@ -131,6 +135,8 @@ const llvm::Type *CodeGenFunction::ConvertType(QualType T, SourceLocation Loc) {
 
 
 void CodeGenFunction::GenerateCode(const FunctionDecl *FD) {
+  LLVMIntTy = ConvertType(getContext().IntTy, FD->getLocation());
+  
   const llvm::FunctionType *Ty = 
     cast<llvm::FunctionType>(ConvertType(FD->getType(), FD->getLocation()));