From ddf53e45b29087c57e0c864c93f86d5e99182d55 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Mon, 26 Feb 2007 02:56:58 +0000
Subject: [PATCH] track signedness of formal argument, though we have a fixme
 here.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34620 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
index 69aa6aedf86..3842db5d9d0 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
@@ -3111,8 +3111,16 @@ TargetLowering::LowerArguments(Function &F, SelectionDAG &DAG) {
     // Flags[31:27] -> OriginalAlignment
     // Flags[2] -> isSRet
     // Flags[1] -> isInReg
+    // Flags[0] -> isSigned
     unsigned Flags = (isInReg << 1) | (isSRet << 2) | (OriginalAlignment << 27);
 
+    // FIXME: Distinguish between a formal with no [sz]ext attribute from one
+    // that is zero extended!
+    if (FTy->paramHasAttr(j, FunctionType::ZExtAttribute))
+      Flags |= 0;
+    if (FTy->paramHasAttr(j, FunctionType::SExtAttribute))
+      Flags |= 1;
+    
     switch (getTypeAction(VT)) {
     default: assert(0 && "Unknown type action!");
     case Legal: