Implement support for formal arguments. We can now compile this:

int test(int X, short Y, float Z) {
  return (int)(X*Y+Z);
}

to:

define i32 @test(i32 %X, i16 %Y, float %Z) {
entry:
        %promote = sext i16 %Y to i32           ; <i32> [#uses=1]
        %mul = mul i32 %promote, %X             ; <i32> [#uses=1]
        %promote3 = sitofp i32 %mul to float            ; <float> [#uses=1]
        %add = add float %promote3, %Z          ; <float> [#uses=1]
        %conv = fptosi float %add to i32                ; <i32> [#uses=1]
        ret i32 %conv
}

with:

$ clang -emit-llvm t.c | llvm-as | opt -std-compile-opts | llvm-dis

llvm-svn: 39652

1 files changed, 3 insertions, 3 deletions

diff --git a/clang/AST/Decl.cpp b/clang/AST/Decl.cpp
index ca37f7cfc9f..f7301181d72 100644
--- a/clang/AST/Decl.cpp
+++ b/clang/AST/Decl.cpp
@@ -124,14 +124,14 @@ unsigned FunctionDecl::getNumParams() const {
   return cast<FunctionTypeProto>(getType().getTypePtr())->getNumArgs();
 }
 
-void FunctionDecl::setParams(VarDecl **NewParamInfo, unsigned NumParams) {
+void FunctionDecl::setParams(ParmVarDecl **NewParamInfo, unsigned NumParams) {
   assert(ParamInfo == 0 && "Already has param info!");
   assert(NumParams == getNumParams() && "Parameter count mismatch!");
   
   // Zero params -> null pointer.
   if (NumParams) {
-    ParamInfo = new VarDecl*[NumParams];
-    memcpy(ParamInfo, NewParamInfo, sizeof(VarDecl*)*NumParams);
+    ParamInfo = new ParmVarDecl*[NumParams];
+    memcpy(ParamInfo, NewParamInfo, sizeof(ParmVarDecl*)*NumParams);
   }
 }